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Document and Entity Information - shares	9 Months Ended
Sep. 30, 2015	Nov. 05, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	dea
Entity Registrant Name	Easterly Government Properties, Inc.
Entity Central Index Key	0001622194
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		24,168,379

Combined Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Real estate properties, net	$ 668,034
Real estate investments, at fair value		$ 267,683
Cash and cash equivalents	4,466	31,437
Restricted cash	1,810
Rents receivable	5,632
Accounts receivable	2,856
Deferred financing, net	2,856
Intangible assets, net	104,657
Prepaid expenses and other assets	2,869	1,385
Total assets	793,180	300,505
Liabilities
Revolving credit facility	50,167
Mortgage notes payable	68,756
Intangible liabilities, net	39,690
Accounts payable and accrued liabilities	6,982	3,321
Total liabilities	165,595	3,321
Commitments and contingencies (Note 9)
Equity
Common stock, par value $0.01, 200,000,000 and 100,000 shares authorized, 24,168,379 and 1,000 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	241
Additional paid-in capital	391,357	1
Retained (deficit)	(1,799)
Cumulative dividends	(7,734)
Total stockholders' equity	382,065	1
Members' capital		13,336
Non-controlling interest		283,847
Non-controlling interest in operating partnership	245,520
Total equity	627,585	297,184
Total liabilities and equity	$ 793,180	$ 300,505

Combined Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Rental income	$ 18,126		$ 45,056
Tenant reimbursements	1,689		4,037
Other income	42		111
Income from real estate investments		$ 1,859		$ 4,601
Total revenues	19,857	1,859	49,204	4,601
Operating expenses
Property operating	3,838		9,126
Real estate taxes	1,980		4,694
Depreciation and amortization	9,344		23,395
Acquisition costs	235		1,870
Formation expenses			1,666
Corporate general and administrative	2,301	3,318	6,112	4,586
Fund general and administrative		154	75	714
Total expenses	17,698	3,472	46,938	5,300
Operating income	2,159	(1,613)	2,266	(699)
Other (expenses) / income
Interest expense, net	(1,341)		(3,362)
Net unrealized gain (loss) on investments		24,645	(5,122)	71,865
Net income (loss)	818	23,032	(6,218)	71,166
Non-controlling interest in operating partnership	(320)		4,419
Net income (loss) available to Easterly Government Properties, Inc.	$ 498	(3,309)	$ (1,799)	(4,664)
Net income (loss) available to Easterly Government Properties, Inc. per share:
Basic	$ 0.02		$ (0.09)
Diluted	$ 0.02		$ (0.09)
Weighted- average common shares outstanding
Basic	24,141,712		20,516,184
Diluted	25,216,716		20,516,184
Easterly Partners, LLC [Member]
Other (expenses) / income
Non-controlling interest in operating partnership		$ (26,341)		$ (75,830)

Combined Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net income (loss)	$ 818	$ (6,218)	$ 71,166
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization	9,344	23,395
Amortization of above- / below-market leases	1,400	3,400
Net unrealized gain (loss) on investments		5,122	(71,865)
Cash flows from financing activities
Dividends and distributions paid		(12,732)
Cash and cash equivalents, beginning of period		31,437
Cash and cash equivalents, end of period	4,466	4,466
Easterly Government Properties LP [Member]
Cash flows from operating activities
Net income (loss)		(6,218)	71,166
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization		23,395
Straight line rent		(165)
Amortization of above- / below-market leases		(3,359)
Amortization of loan premium / discount		(59)
Amortization of deferred financing costs		541
Purchase of investments			(30,316)
Deposits for potential new investments			668
Contributions to investments		(257)	(1,575)
Distributions from investments			5,478
Net unrealized gain (loss) on investments		5,122	(71,865)
Other		1,175
Net change in:
Rents receivable		(4,154)
Accounts receivable		(268)
Prepaid expenses and other assets		(639)	234
Accounts payable and accrued liabilities		3,657	1,341
Net cash provided by (used in) operating activities		18,771	(24,869)
Cash flows from investing activities
Real estate acquisitions and deposits		(52,425)
Cash assumed in formation		6,187
Additions to real estate property		(256)
Restricted cash		(172)
Net cash (used in) investing activities		(46,666)
Cash flows from financing activities
Payment of deferred financing costs		(3,397)
Issuance of common shares		193,545
Repurchase of initial shares		(1)
Proceeds from private placement		75,638
Credit facility draws, net		50,167
Repayments of mortgage payable		(1,512)
Debt payoff		(293,381)
Dividends and distributions paid		(12,732)
Contributions			65,645
Distributions		(5,441)	(11,082)
Payment of offering costs		(1,962)
Net cash provided by financing activities		924	54,563
Net increase (decrease) in cash and cash equivalents		(26,971)	29,694
Cash and cash equivalents, beginning of period		31,437	3,363
Cash and cash equivalents, end of period	$ 4,466	4,466	33,057
Supplemental disclosure of cash flow information is as follows (amounts in thousands):
Cash paid for interest		2,733
Additions to real estate property		41
Other			$ 342
Contribution for shares and OPUs		260,687
Easterly Government Properties LP [Member] \| Western Devcon, Inc [Member]
Supplemental disclosure of cash flow information is as follows (amounts in thousands):
Contribution for shares and OPUs		$ 86,397

Organization and Basis of Presentation	9 Months Ended
Organization and Basis of Presentation	Sep. 30, 2015
Accounting Policies [Abstract]
Organization and Basis of Presentation	1. Organization and Basis of Presentation Easterly Government Properties, Inc. (which may be referred to in these financial statements as the “Company,” “we,” “us,” or “our”) is a Maryland corporation that intends to qualify as a real estate investment trust (a “REIT”) under the Internal Revenue Code (the “Code”) commencing with its taxable period ending on December 31, 2015. The operations of the Company are carried on primarily through Easterly Government Properties LP (the “Operating Partnership”) and the wholly owned subsidiaries of the Operating Partnership. We are an internally managed REIT, focused primarily on the acquisition, development, and management of Class A commercial properties that are leased to U.S. Government agencies that serve essential functions. We generate substantially all of our revenue by leasing our properties to such agencies through the U.S. General Services Administration (the “GSA”). Our objective is to generate attractive risk-adjusted returns for our stockholders over the long term through dividends and capital appreciation. As of September 30, 2015, we wholly owned 32 properties in the United States, including 29 properties that were leased primarily to U.S. Government tenant agencies and three properties that were entirely leased to private tenants, encompassing approximately 2.3 million square feet in the aggregate. We focus on acquiring, developing, and managing GSA-leased properties that are essential to supporting the mission of the tenant agency and strive to be a partner of choice for the U.S. Government, working closely with the GSA to meet the needs and objectives of the tenant agency. We were incorporated in Maryland as a corporation on October 9, 2014 and did not have any meaningful operations until the completion of the formation transactions and our initial public offering on February 11, 2015 (the “IPO”). On February 11, 2015, we completed an initial public offering of 13.8 million shares of our common stock at a price to the public of $15.00 per share, including 1.8 million shares sold in connection with the full exercise of the option to purchase additional shares granted to the underwriters, resulting in gross proceeds of $207.0 million. The aggregate net proceeds to the Company after deducting underwriting discounts and commissions and offering expenses payable by the Company, was approximately $191.6 million. The Company contributed the net proceeds from the IPO to the Operating Partnership in exchange for common units representing limited partnership interests in the Operating Partnership (“common units”). In connection with the IPO, we engaged in certain formation transactions (the “formation transactions”) pursuant to which the Operating Partnership acquired (i) 15 properties previously owned by the Easterly Funds (as defined below) in exchange for 3,308,000 shares of common stock and 8,635,714 common units (ii) 14 properties previously owned by Western Devcon, Inc., a private real estate company and a series of related entities beneficially owned by Michael P. Ibe (collectively, “Western Devcon”), in exchange for 5,759,819 common units and (iii) all of the ownership interests in the management entities (as defined below) in exchange for 1,135,406 common units. Concurrent with the IPO, the Company sold an aggregate of 7,033,712 shares of its common stock to the Easterly Funds in a private placement at a price per share of $15.00 without payment of any underwriting fees, discounts or commissions. Our predecessor (the “Predecessor”) means Easterly Partners, LLC and its consolidated subsidiaries, including (i) all entities or interests in U.S. Government Properties Income and Growth Fund L.P., U.S. Government Properties Income and Growth Fund REIT, Inc. and the related feeder and subsidiary entities (collectively, “Easterly Fund I,”) (ii) all entities or interests in U.S. Government Properties Income and Growth Fund II, LP, USGP II REIT LP, USGP II (Parallel) Fund, LP and their related feeders and subsidiary entities (collectively, “Easterly Fund II” and, together with Easterly Fund I, the “Easterly Funds”) and (iii) the entities that manage the Easterly Funds, (the “management entities”). All of the Company’s assets and its operations are primarily conducted through the Operating Partnership. The Company is the sole general partner of the Operating Partnership. The Company owned 60.9% of the Operating Partnership’s common units at September 30, 2015 and the remaining 39.1% was owned by the Easterly Funds and certain members of management. Principle of Combination and Consolidation The accompanying consolidated financial statements are presented on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and include the accounts of the Company, including Easterly Government Properties TRS, LLC and Easterly Government Services, LLC, and the Operating Partnership. All significant intercompany balances and transactions have been eliminated in consolidation. Upon completion of the IPO and the related formation transactions, the Company succeeded to the operations of the Predecessor. Prior to the IPO, the Predecessor was under the control of Darrell W. Crate, the Chairman of our Board of Directors. These financial statements reflect the consolidated equity ownership structure of the Company as if the IPO and formation transactions related to the Easterly Funds and management entities had been completed as of January 1, 2014. The formation transactions related to the Easterly Funds and the management entities were accounted for at carryover basis due to the existence of common control. Prior to the IPO, the Easterly Funds, as controlled by the Predecessor, qualified as investment companies pursuant to ASC 946 Financial Services – Investment Companies and, as a result, the Predecessor’s consolidated financial statements accounted for the Easterly Funds using specialized investment company accounting based on fair value. Subsequent to the IPO, as the properties contributed to us from the Easterly Funds are no longer held by funds that qualify for investment company accounting, we made a shift, in accordance with GAAP, to account for the properties contributed by the Easterly Funds using historical cost accounting instead of investment company accounting, resulting in a significant change in the presentation of our consolidated financial statements following the formation transactions. The contribution of the Western Devcon properties in the formation transactions has been accounted for as a business combination using the acquisition method of accounting and recognized at the estimated fair value of acquired assets and assumed liabilities on the date of such contribution. Due to the timing of the IPO and the formation transactions, the Company’s financial condition as of December 31, 2014 reflects the financial condition of the Company and the Predecessor and the results of operations for the three and nine months ended September 30, 2014 reflect the financial condition and results of operations of the Predecessor. The Company’s financial condition as of September 30, 2015 and results of operations for the nine months ended September 30, 2015 reflect the financial condition and results of operations of the Predecessor combined with the Company for the period prior to February 11, 2015, and the Company’s consolidated results for the period from February 11, 2015 through September 30, 2015. Interim Financial Information The information in the Company’s combined consolidated financial statements for the three and nine months ended September 30, 2015 and 2014 is unaudited and at December 31, 2014 is audited. All significant inter-company balances and transactions have been eliminated in consolidation. The accompanying financial statements for the three and nine months ended September 30, 2015 and 2014 and at December 31, 2014 include adjustments based on management’s estimates (consisting of normal and recurring accruals), which the Company considers necessary for a fair presentation of the results for the periods. The financial information should be read in conjunction with the combined consolidated financial statements contained in the Company’s 2014 Annual Report on Form 10-K for the year ended December 31, 2014 and the notes thereto and the final prospectus relating to the IPO, dated February 5, 2015, both of which the Company filed with the Securities and Exchange Commission (the “SEC”). Operating results for the three and nine months ended September 30, 2015 and 2014 are not necessarily indicative of actual operating results for the entire year.

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

The accompanying unaudited interim consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements.

The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the balance sheet and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

In light of the significant differences that exist between our basis of accounting subsequent to the IPO (historical cost accounting) and the pre-IPO basis of accounting (investment company accounting), we present the significant accounting policies for both periods below.

a) Significant Accounting Policies for the Company post-IPO

Real Estate Properties

Real estate properties comprise all tangible assets we hold for rent. Real property is recognized at cost less accumulated depreciation. Betterments, major renovations and certain costs directly related to the improvement of real properties are capitalized. Maintenance and repair expenses are charged to expense as incurred.

When we acquire properties, we allocate the purchase price to numerous tangible and intangible components. Our process for determining the allocation to these components requires many estimates and assumptions, including the following: (1) determination of market rental rates; (2) estimation of leasing and tenant improvement costs associated with the remaining term of acquired leases; (3) assumptions used in determining the in-place lease and if-vacant value including the rental rates, period of time that it would take to lease vacant space and estimated tenant improvement and leasing costs; (4) renewal probabilities; and (5) allocation of the if-vacant value between land and building. A change in any of the above key assumptions can materially change not only the presentation of acquired properties in our consolidated financial statements but also our reported results of operations. The allocation to different components affects the following:

the amount of the purchase price allocated among different categories of assets and liabilities on our consolidated balance sheets; and the amount of costs assigned to individual properties in multiple property acquisitions;

where the amortization of the components appear over time in our consolidated statements of operations. Allocations to above- and below-market leases are amortized into rental revenue, whereas allocations to most of the other tangible and intangible assets are amortized into depreciation and amortization expense. As a REIT, this is important to us since much of the investment community evaluates our operating performance using non-GAAP measures such as funds from operations, the computation of which includes rental revenue but does not include depreciation and amortization expense; and

the timing over which the items are recognized as revenue or expense in our consolidated statements of operations. For example, for allocations to the as-if vacant value, the land portion is not depreciated and the building portion is depreciated over a longer period of time than the other components (generally 40 years). Allocations to above- and below-market leases and in-place lease value are amortized over significantly shorter timeframes, and if individual tenants’ leases are terminated early, any unamortized amounts remaining associated with those tenants are written off upon termination. These differences in timing can materially affect our reported results of operations.

Tenant improvements are capitalized in real property when we own the improvement. When we are required to provide improvements under the terms of a lease, we need to determine whether the improvements constitute landlord assets or tenant assets. If the improvements are considered landlord assets, we capitalize the cost of the improvements and recognize depreciation expense associated with such improvements over the shorter of the useful life of the assets or the term of the lease and recognize any payments from the tenant as rental revenue over the term of the lease. If the improvements are considered tenant assets, we defer the cost of improvements funded by us as a lease incentive asset and amortize it as a reduction of rental revenue over the term of the lease. Our determination of whether improvements are landlord assets or tenant assets also may affect when we commence revenue recognition in connection with a lease. In determining whether improvements constitute landlord or tenant assets, we consider numerous factors that may require subjective or complex judgments, including: whether the improvements are unique to the tenant or reusable by other tenants; whether the tenant is permitted to alter or remove the improvements without our consent or without compensating us for any lost fair value; whether the ownership of the improvements remains with us or remains with the tenant at the end of the lease term; and whether the economic substance of the lease terms is properly reflected.

Depreciation of an asset begins when it is available for use and is calculated using the straight-line method over the estimated useful lives. Each period, depreciation is charged to expense and credited to the related accumulated depreciation account. A used asset acquired is depreciated over its estimated remaining useful life, not to exceed the life of a new asset. Range of useful lives for depreciable assets are as follows:

Category		Term
Buildings		40 years
Building improvements		5 - 40 years
Tenant improvements		Shorter of remaining life of the lease or useful life
Furniture and equipment		3 - 7 years

We regularly evaluate whether events or changes in circumstances have occurred that could indicate an impairment in the value of long lived assets. If there is an indication that the carrying value of an asset is not recoverable, we estimate the projected undiscounted cash flows to determine if an impairment loss should be recognized. We determine the amount of any impairment loss by comparing the historical carrying value to estimated fair value. We estimate fair value through an evaluation of recent financial performance and projected discounted cash flows using standard industry valuation techniques. In addition to consideration of impairment upon the events or changes in circumstances described above, we regularly evaluate the remaining lives of our long lived assets. If we change our estimate of the remaining lives, we allocate the carrying value of the affected assets over their revised remaining lives.

Cash and Cash Equivalents

Cash and cash equivalents include all cash and liquid investments that mature three months or less from when they are purchased. Cash equivalents are reported at cost, which approximates fair value. We maintain our cash in bank accounts in amounts that may exceed federally insured limits at times. We have not experienced any losses in these accounts and believe that we are not exposed to significant credit risk because our accounts are deposited with major financial institutions.

Restricted Cash

Restricted cash consists of amounts escrowed for future real estate taxes, insurance, capital expenditures and debt service, as required by certain of our mortgage debt agreements.

Deferred Financing Costs

Deferred financing fees include issuance costs related to borrowings and we amortize those costs over the terms of the related indebtedness. Any unamortized amounts upon early repayment of mortgage notes payable are written off in the period in which repayment occurs. Fully amortized deferred financing fees are removed from the books upon maturity or repayment of the underlying debt. As of September 30, 2015, we recognized $3.4 million in deferred financing costs associated with entering into a $400.0 million senior unsecured revolving credit facility upon completion of the IPO. Additionally, for the three and nine months ended September 30, 2015 we recognized $0.2 million and $0.5 million, respectively, in accumulated amortization associated with the credit facility.

Non-Controlling Interests

Non-controlling interests relate to the common units of the Operating Partnership not owned by the Company. Common units are owned by the limited partners who contributed properties and other assets to the Operating Partnership in exchange for common units. The Company contributed the net proceeds from the IPO to the Operating Partnership in exchange for common units. Fifteen months after the IPO, limited partners of the Operating Partnership, other than the Company, will have the right to require the Operating Partnership to redeem part or all of their common units for cash, based upon the value of an equivalent number of shares of the Company’s common stock at the time of the election to redeem, or, at the Company’s election, shares of the Company’s common stock on a one-for-one basis. Unitholders receive a distribution per unit equivalent to the dividend per share of the Company’s common stock. Pursuant to the consolidation accounting standard with respect to the accounting and reporting for non-controlling interest changes and changes in ownership interest of a subsidiary, changes in parent’s ownership interest when the parent retains controlling interest in the subsidiary should be accounted for as equity transactions. The carrying amount of the non-controlling interest shall be adjusted to reflect the change in its ownership interest in the subsidiary, with the offset to equity attributable to the Company.

Revenue Recognition

Rental income includes base rents paid by each tenant in accordance with its lease agreement conditions. We recognize rental income on a straight-line basis over the lease term of the respective leases. For acquisitions of existing buildings, we recognize rental income from leases already in place coincident with the date of property closing. Lease incentives are recorded as a deferred asset and amortized as a reduction of revenue on a straight-line basis over the respective lease term. Tenant reimbursement income (scheduled rent increases based on increases in real estate taxes, operating expenses and utility usage) is recognized by us in the consolidated statements of operations when earned and when their amounts can be reasonably estimated. Above- and below-market leases are amortized into rental income over the terms of the respective leases.

Income Taxes

We intend to elect and to qualify as a REIT for U.S. federal income tax purposes commencing with the taxable year ending December 31, 2015. So long as we qualify as a REIT, we generally will not be subject to U.S. federal income tax on our net income that we distribute to our stockholders. To maintain our qualification as a REIT, we are required under the Code to distribute at least 90% of our REIT taxable income (without regard to the deduction for dividends paid and excluding net capital gains) to our stockholders and meet certain other requirements. If we fail to qualify as a REIT in any taxable year, we will be subject to U.S. federal income tax on our taxable income at regular corporate rates. Even if we qualify as a REIT, we will be subject to certain U.S. federal, state and local taxes on our income and property, and on taxable income that we do not distribute to our stockholders. In addition, we may provide services that are not customarily provided by a landlord, hold properties for sale and engage in other activities (such as a management business) through Taxable REIT Subsidiaries (“TRSs”) and the income of those subsidiaries will be subject to U.S. federal income tax at regular corporate rates. For the period ending September 30, 2015, we did not incur any material tax liability associated with any of the above.

We do not anticipate any potential expense related to uncertain tax positions as we closely monitor our REIT compliance, do not have any prohibited transactions related to property sales, and neither the states in which we operate nor our foreign investors subject us to withholding tax requirements.

Stock Based Compensation

Prior to the completion of the IPO, our Board of Directors adopted, and our sole stockholder approved, our 2015 Equity Incentive Plan, under which we may grant future cash and equity incentive awards to our executive officers, non-employee directors and eligible employees. See Note 6 (Equity) for further information. The shares issued to officers, employees, and non-employee directors vest over a period of time as determined by the Board of Directors at the date of grant. The Company recognizes compensation expense for non-vested shares granted to officers, employees and non-employee directors on a straight-line basis over the requisite service and/or performance period based upon the fair market value of the shares on the date of grant, as adjusted for forfeitures.

Earnings Per Share of Common Stock Amount

Basic earnings per share is calculated by dividing net income available to Easterly Government Properties Inc. by the weighted-average number of shares of common stock outstanding during the period, excluding the weighted average number of unvested restricted shares. Diluted earnings per share is calculated by dividing net income by the weighted-average number of shares of common stock outstanding during the period plus other potentially dilutive securities such as stock grants or shares that would be issued in the event that common units of the Operating Partnership are redeemed for shares of common stock of the Company. Unvested restricted shares and LTIP units are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share.

Deferred Offering Costs

The Company capitalizes certain legal, accounting and other third party fees that are directly associated with in-process equity financings as other assets until such financings are consummated. After consummation of the equity financing, these costs are recorded as a reduction to capital. Should the equity financing no longer be considered probable of being consummated, the deferred offering costs would be expensed immediately as a charge to corporate general and administrative expenses in the accompanying combined statement of operations.

Segments

The Company manages its operations as a single segment for the purposes of assessing performance and making operating decisions. All revenue has been generated in the United States and all tangible assets are held in the United States.

Application of new accounting standards

In September 2015, the Financial Accounting Standards Board (“FASB”) issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805). ASU 2015-16 addresses provisional amounts for items in a business combination for which the accounting is incomplete by the end of the reporting period. The guidance requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined, calculated as if the accounting had been completed as of the acquisition date and the amounts disclosed either on the face of the financial statements or the notes. This guidance is to be applied prospectively and is effective for fiscal years beginning after December 15, 2015. The Company is currently in the process of evaluating the impact the adoption of ASU 2015-16 will have on the Company’s financial statements.

In April 2015, FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. The guidance requires that all costs incurred to issue debt be presented in the balance sheet as a direct deduction from the carrying value of the debt. The amortization of these costs will remain under the interest method and will continue to be reported as interest expense. The guidance is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted for financial statements that have not been previously issued. The new guidance will be applied on a retrospective basis. We have not yet determined the impact, if any, that the adoption of this guidance will have on our consolidated financial statements. In August of 2015, the FASB issued ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements (Subtopic 835-30), which clarified the presentation of debt issuance costs related to credit facility arrangements, given the absence of authoritative guidance within ASU 2015-03. Under ASU 2015-15, debt issuance costs paid to third parties other than the lender related to credit facilities may be presented in the balance sheet as an asset, regardless of whether there are any outstanding borrowings on the credit facility. We have not yet determined the impact, if any, that the adoption of this guidance will have on our consolidated financial statements.

In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis. The guidance modifies the analysis a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The guidance does not change the general order in which the consolidation models are applied. A reporting entity that holds an economic interest in, or is otherwise involved with, another legal entity first determines if the variable interest entity model applies, and if so, whether it holds a controlling financial interest under that model. If the entity being evaluated for consolidation is not a variable interest entity, then the voting model should be applied to determine whether the entity should be consolidated by the reporting entity. Key changes to the guidance include, though are not limited to; (i.) limiting the extent to which related party interests are included in the other economic interest criterion to the decision maker’s effective interest holding, (ii.) requiring limited partners of a limited partnership, or the members of a limited liability company that is similar to a limited partnership, to have, at minimum, kick-out or participating rights to demonstrate that the partnership is a voting entity, (iii.) changing the evaluation of whether the equity holders at risk lack decision making rights when decision making is outsourced and (iv.) changing how the economics test is performed. The guidance does not amend the existing disclosure requirements for variable interest entities or voting model entities. The guidance is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. This standard will not have a significant impact as the Company does not have any joint ventures.

b) Significant Accounting Policies of the Company pre-IPO

Real Estate Investments

Real estate investments represent investments in real estate entities that own real estate assets and are stated at the fair value of the net equity interest in the real estate investments as discussed below. Subsequent changes in fair value are recorded as unrealized gains or losses. Upon the disposition of a real estate investment, realized gains and losses are determined by deducting the proceeds received by the Predecessor from the basis of the real estate investment; any previously unrealized gains and losses are reversed.

Distributions from real estate entities are recorded as dividend income when received to the extent distributed from the estimated taxable earnings and profits of the underlying investment vehicle and as a return of capital to the extent not in excess of that amount.

Under investment company accounting, the statements of operations reflect the change in fair value of the real estate investments of the Easterly Funds, prior to the IPO, whether realized or unrealized.

Fair Value of Investments

The fair value of the real estate investments is determined using a fair value hierarchy. The fair value hierarchy is based on the observability of inputs used to measure fair value and requires additional disclosure regarding the fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between marketplace participants at the measurement date (exit price). The fair value of an asset or a liability disregards transaction costs and assumes the asset or liability’s highest and best use. As the investments are in entities that invest in real estate, the estimated values are based on the underlying assets, liabilities, and cash flows of the related properties. The three levels of the fair value hierarchy are described below:

Level 1		Valuation is based upon quoted prices for identical assets or liabilities in an active market.

Level 2		Valuation is based upon observable inputs:

		a) Quoted prices for similar assets or liabilities in active markets,

		b) Quoted prices for identical or similar assets or liabilities in not active markets, or

		c) Model-based valuation techniques for which all significant assumptions are observable in the market.

Level 3		Valuation is based upon prices or valuation techniques that require assumptions not observable in the market which are significant to the overall fair value measurement. These unobservable inputs reflect the Predecessor’s own estimates about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). Valuation techniques include the use of discounted cash flow models, and similar techniques.

Non-Controlling Interest

Consolidation addresses the accounting and reporting standards for ownership interests in subsidiaries held by parties other than the parent, the amount of consolidated capital resulting from operations attributable to the parent and to the non-controlling interest, the changes in a parent’s ownership interest, and the valuation of retained non-controlling equity investments when a subsidiary is deconsolidated per ASC 810.

Prior to the IPO, all of the partners invested in the Easterly Funds represented a non-controlling interest. In addition, prior to the IPO, a third-party member had invested in Federal Properties, GP, LLC, an entity included within the Predecessor, which also represented a non-controlling interest.

Real Estate and Intangibles

9 Months Ended

Sep. 30, 2015

Real Estate [Abstract]

Real Estate and Intangibles

3. Real Estate and Intangibles

Formation transactions

The contribution of the investments of the Easterly Funds to the Operating Partnership pursuant to the formation transactions is accounted for as transactions among entities under common control. As a result, the fair value of the real estate investments at the time of the formation transactions was deemed the initial cost. Such fair value was allocated to the underlying real estate properties, related intangible assets and liabilities and mortgage debt ascribed to the properties. Refer to Note 5 (Fair Value Measurements) for additional discussion on fair value. Prior to the IPO on February 11, 2015, the Easterly Funds qualified as investment companies pursuant to ASC 946 Financial Services – Investment Companies and, as a result, the Predecessor’s consolidated financial statements accounted for the Easterly Funds using investment company accounting based on fair value. Subsequent to the IPO, as the properties contributed to us from the Easterly Funds are no longer held by funds that qualify for investment company accounting, we made a shift, in accordance with GAAP to account for the properties contributed by the Easterly Funds using historical cost accounting instead of investment company accounting, resulting in a significant change in the presentation of our consolidated financial statements following the formation transactions.

As part of the formation transactions, Western Devcon entered into a contribution agreement with us and the Operating Partnership pursuant to which it contributed its 100% equity interest in each of 14 properties to the Operating Partnership upon completion of the IPO. In exchange for its contribution, Western Devcon received 5,759,819 common units in the Operating Partnership valued at the time of the IPO at $86.4 million. This contribution has been accounted for as a business combination using purchase accounting. The total estimated purchase price, equal to the aggregate value of the Operating Partnership’s common units plus the estimated fair value of debt assumed, was allocated to the net tangible assets and intangible assets based on their estimated fair values as of the completion of the acquisition of the Western Devcon properties.

As part of the formation transactions, we acquired the following properties, as set forth in the table below:

Property	Location	Property Type	Rentable Square Feet
Easterly Portfolio
IRS - Fresno	Fresno, CA	Office		180,481
PTO- Arlington	Arlington, VA	Office		189,871
FBI - San Antonio	San Antonio, TX	Office		148,584
FBI - Omaha	Omaha, NE	Office		112,196
ICE - Charleston	North Charleston, SC	Office		86,733
DOT - Lakewood	Lakewood, CO	Office		122,225
USFS II - Albuquerque	Albuquerque, TX	Office		98,720
USFS I - Albuquerque	Albuquerque, TX	Office		92,455
AOC - Del Rio	Del Rio, TX	Courthouse/Office		89,880
DEA - Dallas	Dallas, TX	Office		71,827
DEA - Albany	Albany, NY	Office		31,976
FBI - Little Rock	Little Rock, AR	Office		101,977
CBP - Sunburst	Sunburst, MT	Office		33,000
USCG - Martinsburg	Martinsburg, WV	Office		59,547
MEPCOM - Jacksonville	Jacksonville, FL	Office		30,000
		Total		1,449,472

Western Devcon
CBP - Savannah	Savannah, GA	Laboratory		35,000
AOC - El Centro	El Centro, TX	Courthouse/Office		46,813
DEA - Vista	Vista, CA	Laboratory		54,119
DEA - Santa Ana	Santa Ana, CA	Office		39,905
CBP - Chula Vista	Chula Vista, CA	Office		59,397
DEA - North Highlands	Sacramento, CA	Office		37,975
DEA - Otay	San Diego, CA	Office		32,560
DEA - Riverside	Riverside, CA	Office		34,354
SSA - Mission Viejo	Mission Viejo, CA	Office		11,590
SSA - San Diego	San Diego, CA	Office		11,743
DEA - San Diego	San Diego, CA	Warehouse		16,100
2650 SW 145th Avenue - Parbel of Florida	Miramar, FL	Warehouse/Distribution		81,721
5998 Osceola Court - United Technologies	Midland, GA	Manufacturing Warehouse		105,641
501 East Hunter Street - Lummus Corporation	Lubbock, TX	Distribution		70,078
		Total		636,996

The fair values of the assets acquired and liabilities assumed upon completion of the formation transactions are as follows (dollars in thousands):

	Easterly Portfolio			Western Devcon, Inc.			Total
Real estate
Land	$	43,681		$	35,573		$	79,254
Building		411,472			107,424			518,896
Acquired tenant improvements		27,441			4,388			31,829
Total real estate		482,594			147,385			629,979
Intangible assets
In-place leases		61,218			21,308			82,526
Acquired leasing commissions		11,257			4,350			15,607
Above-market leases		2,644			7,763			10,407
Total intangible assets		75,119			33,421			108,540
Intangible liabilities
Below-market leases		(34,383	)		(2,322	)		(36,705	)
Total intangible liabilities		(34,383	)		(2,322	)		(36,705	)
Debt assumed		(271,622	)		(92,087	)		(363,709	)
Net current assets transferred		8,979			—			8,979
Net assets acquired	$	260,687		$	86,397		$	347,084

Post Formation Acquisition Activities

For the period from February 11, 2015 to September 30, 2015, we acquired three properties, DOE – Lakewood, AOC – Aberdeen, and ICE – Otay for an aggregate purchase price of $50.9 million. We allocated the purchase prices of these acquisitions based on the estimated fair values of the acquired assets and assumed liabilities as follows:

	Total
Real estate
Land	$	4,776
Building		43,767
Acquired tenant improvements		759
Total real estate		49,302
Intangible assets
In-place leases		7,060
Acquired leasing commissions		1,736
Above-market leases		48
Total intangible assets		8,844
Intangible liabilities
Below-market leases		(7,221	)
Total intangible liabilities		(7,221	)
Purchase price	$	50,925

We did not assume any debt upon acquisition of the three properties. The fair value of the assets acquired and liabilities assumed in 2015 are preliminary as we continue to finalize their acquisition date fair value determination.

The intangible assets and liabilities have an aggregate weighted average amortization period of 7.38 years as of September 30, 2015.

For the period of February 11, 2015 to September 30, 2015, we included $49.2 million of revenues and $10.4 million of net income in our consolidated statement of operations related to the properties contributed or acquired. During the nine months ended September 30, 2015, we incurred $1.9 million of acquisition-related costs associated with the contribution of Western Devcon assets and the acquisition of DOE – Lakewood, AOC – Aberdeen and ICE – Otay and $1.7 million in formation expenses, which include costs associated with the contribution of the investments of the Easterly Funds.

Pro Forma Financial Information

The unaudited pro forma financial information set forth below presents results for the nine months ended September 30, 2015 and 2014 as if the formation transactions and the acquisitions of DOE – Lakewood, AOC – Aberdeen and ICE – Otay had occurred on January 1, 2014. The pro forma information is not necessarily indicative of the results that actually would have occurred nor does it intend to indicate future operating results (dollars in thousands):

	For the nine months ended September 30,
Proforma (unaudited)	2015		2014
Total rental revenue	$	60,356	$	60,356
Net income (loss) ⁽¹⁾		3,760		224

(1)

The net income for the nine months ended September 30, 2015 excludes $3.5 million of property acquisition and formation costs incurred in the nine months ended September 30, 2015. Additionally, the net income for the nine months ended September 30, 2014 was adjusted to include these acquisition and formation costs.

Real estate and intangibles consisted of the following as of September 30, 2015 (dollars in thousands):

	Total
Real estate
Land	$	84,030
Building		562,961
Acquired tenant improvements		32,588
Accumulated amortization		(11,545	)
Total Real Estate	$	668,034
Intangible assets
In-place leases	$	89,586
Acquired leasing commissions		17,343
Above market leases		10,454
Accumulated amortization		(12,726	)
Total Intangible assets	$	104,657
Intangible liabilities
Below market leases	$	(43,926	)
Accumulated amortization		4,236
Total Intangible liabilities	$	(39,690	)

The net projected amortization of total intangible assets and intangible liabilities as of September 30, 2015 are as follows (dollars in thousands):

	Total

Intangible assets
2015		5,263
2016		20,020
2017		18,603
2018		15,199
2019		10,427
Thereafter		35,145
	$	104,657
Intangible liabilities
2015		(1,733	)
2016		(6,812	)
2017		(6,614	)
2018		(6,249	)
2019		(4,504	)
Thereafter		(13,778	)
	$	(39,690	)

Debt

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Debt

4. Debt

At September 30, 2015, our borrowings consisted of the following (dollars in thousands):

	Total
Senior unsecured revolving credit facility	$	50,167
Mortgage debt		68,756
Total	$	118,923

a. Senior Unsecured Revolving Credit Facility

Upon the completion of the IPO on February 11, 2015 we entered into a $400.0 million senior unsecured revolving credit facility with Raymond James Bank, N.A. and Royal Bank of Canada, as co-syndication agents and Citigroup Capital Markets Inc., Raymond James Bank, N.A. and Royal Bank of Canada, as joint lead arrangers and joint book running managers. This credit facility has an accordion feature that provides us with additional capacity, subject to the satisfaction of customary terms and conditions, of up to $250.0 million, for a total facility size of not more than $650.0 million. We intend to use the senior unsecured revolving credit facility to repay indebtedness, fund acquisitions, development and redevelopment opportunities, capital expenditures and the costs of securing new and renewal leases and provide working capital.

The Operating Partnership is the borrower under the senior unsecured revolving credit facility and we and certain of our subsidiaries that directly own certain of our properties are guarantors under the credit facility. The senior unsecured revolving credit facility will terminate in approximately four years. In addition, there will be two extension options for the senior unsecured revolving credit facility and each extension option will allow us to extend the senior unsecured revolving credit facility for an additional six months, in each case if certain conditions are satisfied.

Our senior unsecured revolving credit facility bears interest, at our option, either at:

a fluctuating rate equal to the sum of (a) the highest of (x) Citibank, N.A.’s base rate, (y) the federal funds effective rate plus 0.50% and (z) the one-month LIBOR rate plus 1.00% plus (b) a margin ranging from 0.4% to 0.9%, or

a Eurodollar rate equal to a periodic fixed rate equal to LIBOR plus, a margin ranging from 1.4% to 1.9%, in each case with a margin based on our leverage ratio.

Our senior unsecured revolving credit facility also contains certain customary financial covenants, as follows: (i) the maximum ratio of consolidated total indebtedness to total asset value (each as defined in the agreement) may not exceed 60.0% on any date, provided that the maximum ratio may be increased to 65.0% for the two consecutive quarters following the date on which a material acquisition (as defined in the agreement) occurs, (ii) the maximum ratio of consolidated secured indebtedness (as defined in the agreement) to total asset value may not exceed 40.0% on any date, (iii) the maximum ratio of consolidated secured recourse indebtedness (as defined in the agreement) to total asset value may not exceed 15% on any date, (iv) the minimum consolidated tangible net worth (as defined in the agreement) may not, on any date, be less than the sum of an amount equal to 75.0% of our consolidated tangible net worth as of the closing date of the facility plus an amount equal to 75.0% of the aggregate net cash proceeds received by us from any offering of our capital stock after the closing date of the facility, (v) the minimum ratio of adjusted consolidated EBITDA to consolidated fixed charges (each as defined in the agreement) may not be less than 1.50 to 1.00 on any date, (vi) the maximum ratio of consolidated unsecured indebtedness to unencumbered asset value (each as defined in the agreement) may not exceed 60% as of any date and (vii) the minimum ratio of adjusted consolidated net operating income from unencumbered assets (as defined in the agreement) to interest payable on unsecured debt (as determined in accordance with the agreement) shall not be less than 1.75 to 1.00 on any date. Additionally, under the revolving credit facility, our distributions may not exceed the greater of (i) 95.0% of our FFO or (ii) the amount required for us to maintain our status as a REIT and avoid the payment of federal or state income or excise tax.

Our senior unsecured revolving credit facility also includes customary limits on the percentage of our total asset value that may be invested in unimproved land, unconsolidated joint ventures, redevelopment and development assets (as defined in the agreement), loans, advances or extensions of credit and investments in mixed used assets and require that we obtain consent for mergers in which the company is not the surviving entity. These financial and restrictive covenants may limit the investments we may make and our ability to make distributions. As of September 30, 2015, we were in compliance with all financial and restrictive covenants under our senior unsecured revolving credit facility.

As of September 30, 2015, the interest rate payable on borrowings under our revolving credit facility was 1.61% and the weighted average annual interest rate for borrowings under our revolving credit facility was 1.60% and 1.59% for three and nine months ended September 30, 2015, respectively. As of September 30, 2015, we had $50.2 million outstanding and $349.8 million available under our revolving credit facility.

b. Letters of Credit

As of September 30, 2015, the Company had $0.2 million of standby letters of credit. There were no draws against these letters of credit during the nine months ended September 30, 2015.

c. Mortgage Debt

As part of the formation transaction, we completed the repayment or defeasance of, and full satisfaction of our obligations with respect to, $293.4 million of secured nonrecourse mortgage loans.

The fair value of our mortgage debt was determined at the date of the formation transactions by discounting future contractual principal and interest payments using prevailing market rates for securities with similar terms and characteristics at the date of the IPO. At September 30, 2015, the carrying amount approximated the estimated fair value of the Company’s debt instruments net of any amortization of the notes premium or discount. The table below provides a summary of our mortgage debt at September 30, 2015 (dollars in thousands):

Property	Fixed/Floating	Contractual Interest Rate			Effective Interest Rate			Maturity Date	Principal Balance		Premium/Discount			Carrying Value
CBP - Savannah	Fixed		3.40	%		4.12	%	July 2033	$	15,745	$	(872	)	$	14,873
ICE - Charleston	Fixed		4.21	%		3.93	%	January 2027		22,253		415			22,668
MEPCOM - Jacksonville	Fixed		4.41	%		3.89	%	October 2025		12,690		335			13,025
USFS II - Albuquerque	Fixed		4.46	%		3.92	%	July 2026		17,500		690			18,190
Total									$	68,188	$	568		$	68,756

d. Aggregate Debt Maturities

The Company’s aggregate debt maturities based on outstanding principal as of September 30, 2015 are as follows (dollars in thousands):

	Total
2015	$	650
2016		2,857
2017		2,977
2018		3,100
2019		53,396
Thereafter		55,375
		118,355
Unamortized fair value adjustments		568
	$	118,923

Equity

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Equity

6. Equity

The following table summarizes the changes in our stockholders equity for the nine months ended September 30, 2015 (dollars in thousands):

	Shares			Common Shares Par Value		Additional Paid-in Capital			Retained (deficit)			Distributions in Excess of Earnings			Non- controlling Interest in Operating Partnership			Member Capital / (Deficit)			Non- controlling Interests			Total Equity
Balance at December 31, 2014		1,000		$	—	$	1		$	—		$	—		$	—		$	13,336		$	283,847		$	297,184
Distributions					—		—			—			—			—			(9	)		(5,432	)		(5,441	)
Exchange of members' capital and non controlling interests for OP units and shares		3,308,000			33		67,312			—			—			194,530			(12,738	)		(249,137	)		—
Public Offering		13,800,000			138		191,445			—			—			—			—			—			191,583
Proceeds of private placement		7,033,712			70		105,435			—			—			—			(589	)		(29,278	)		75,638
Contribution of Western Devcon Properties for OP units					—		—			—			—			86,397			—			—			86,397
Stock based compensation					—		209			—			—			966			—			—			1,175
Grant of unvested restricted stock		26,667			—		—			—			—			—			—			—			—
Buyback of common stock		(1,000	)		—		(1	)		—			—			—			—			—			(1	)
Dividends and distributions paid					—		—			—			(7,734	)		(4,998	)		—			—			(12,732	)
Net loss					—		—			(1,799	)		—			(4,419	)		—			—			(6,218	)
Allocation of NCI in Operating Partnership					—		26,956			—			—			(26,956	)		—			—			—
Balance at September 30, 2015		24,168,379		$	241	$	391,357		$	(1,799	)	$	(7,734	)	$	245,520		$	—		$	—		$	627,585

On October 16, 2014, the Company issued 1,000 shares to its sole stockholder, Darrell Crate, for $1,000, which we repurchased upon the IPO.

On February 11, 2015, we completed an initial public offering of 13.8 million shares of our common stock at a price to the public of $15.00 per share, including 1.8 million shares sold in connection with the full exercise of the option to purchase additional shares granted to the underwriters, resulting in gross proceeds of $207.0 million. In connection with the IPO, we engaged in a series of formation transactions by which we acquired 15 properties previously owned by the Easterly Funds and the ownership interests in the management entities in exchange for 9,771,120 common units and 3,308,000 shares of common stock. Additionally, in connection with the IPO, Western Devcon contributed its interest in 14 properties to the Operating Partnership in an exchange for 5,759,819 common units.

Concurrent with the IPO, the Company sold an aggregate of 7,033,712 shares of its common stock to the Easterly Funds in a private placement at a price per share of $15.00 without payment of any underwriting fees, discounts or commissions.

Prior to the completion of the IPO, our Board of Directors adopted, and our sole stockholder approved, our 2015 Equity Incentive Plan, under which we may grant future cash and equity incentive awards to our executive officers, non-employee directors and eligible employees in order to attract, motivate and retain the talent for which we compete. The 2015 Equity Incentive Plan permits us to make grants of options, stock appreciation rights, restricted stock units, restricted stock, dividend equivalent rights, cash-based awards, performance-based awards and other equity-based awards, including LTIP units, or any combination of the foregoing.

On February 10, 2015, we filed with the SEC a registration statement on Form S-8 covering the shares of our common stock issuable under the 2015 Equity Incentive Plan. The 2015 Equity Incentive Plan is administered by the compensation committee of the Board of Directors. The 2015 Equity Incentive Plan permits the granting of both options to purchase shares of our common stock intended to qualify as incentive stock options under Section 422 of the Code and options that do not so qualify. The option exercise price of each option will be determined by our compensation committee but may not be less than 100% of the fair market value of our common stock on the date of grant. The term of each option will be fixed by our compensation committee and may not exceed ten years from the grant date. Our compensation committee may also grant awards of restricted stock, restricted stock units, performance shares or cash-based awards under the 2015 Equity Incentive Plan that are intended to qualify as “performance based compensation” under Section 162(m) of the Code. Those awards would only vest or become payable upon the attainment of performance goals that are established by our compensation committee and related to established performance criteria. From and after the time that we become subject to Section 162(m) of the Code, the maximum award that is intended to qualify as “performance-based compensation” under Section 162(m) of the Code that may be made to any one employee during any one calendar year period is 2,273,959 shares of our common stock with respect to stock-based award and $5.0 million with respect to a cash based award.

The shares issued under the 2015 Equity Incentive Plan are authorized but unissued shares or shares that we reacquire. The shares of our common stock underlying any awards that are forfeited, cancelled, held back upon exercise or settlement of an award to satisfy the exercise price or tax withholding, reacquired by us prior to vesting, satisfied without any issuance of stock, expire or are otherwise terminated (other than by exercise) under the 2015 Equity Incentive Plan are added back to the shares available for issuance under the 2015 Equity Incentive Plan.

We have reserved 2,273,959 shares of our common stock for issuance of awards under the 2015 Equity Incentive Plan, including 26,667 shares of restricted common stock issued to our non-employee directors at the completion of the IPO, which will vest upon the anniversary of the date of grant or the next annual stockholder meeting, as applicable.

On May 6, 2015, the Board approved the issuance of 891,000 LTIP Units of limited partnership interest in the Operating Partnership to members of management under a long-term incentive plan. Earned awards (if any) will vest 50% on February 15, 2018 and 50% on February 6, 2019, subject to the Company achieving certain absolute and relative total shareholder returns and management’s continued employment. Vesting will be accelerated in the event of a change in control, termination of employment by the Company without cause, or termination of employment by the award recipient for good reason, death, disability or retirement. If there is a change of control prior to February 15, 2018, earned awards will be calculated based on total shareholder return performance up to the date of the change of control. The LTIP unit awards (i) are subject to forfeiture to the extent awards are not earned and (ii) prior to the performance measurement date are only entitled to one-tenth (10%) of the regular quarterly distributions payable on common units. The Company measures the LTIP Unit awards at the fair value on date of grant.

We recognized $0.7 million and $1.2 million in compensation expense related to the restricted common stock and the LTIP Unit awards for the three and nine months ended September 30, 2015, respectively. As of September 30, 2015 unrecognized compensation expense for both awards was $6.9 million.

No additional shares of common stock or options were issued under the 2015 Equity Incentive Plan as of September 30, 2015. All shares of our common stock issued to the Easterly Funds as a part of the IPO, the formation transactions and the concurrent private placement will be eligible for future sale following the expiration of the 180-day lock-up period, and certain of such shares held by holders of shares of our common stock and holders of common units in our operating partnership (other than the Company and its affiliates) will have registration rights pursuant to registration rights agreements that we have entered into with those investors. When the restrictions under the lock-up arrangements expire or are waived, the related shares of common stock or securities convertible into, exchangeable for, exercisable for, or repayable with common stock will be available for sale or resale, as the case may be.

Our board of directors declared and paid a dividend for the first quarter of 2015 in the amount of $0.11 per share of common stock and per common unit of the operating partnership, outstanding to stockholders and common unit holders of record as of the close of business on May 18, 2015. Our board of directors also declared and paid a dividend for the first quarter of 2015 for each LTIP unit in an amount equal to 10% of the dividend paid per common unit of our operating partnership.

On August 4, 2015, the board of directors declared a dividend for the second quarter of 2015 in the amount of $0.21 per share of common stock and per common unit of our operating partnership, outstanding to stockholders and common unit holders of record as of the close of business on August 18, 2015. Our board of directors also declared a dividend for the second quarter of 2015 for each LTIP unit in an amount equal to 10% of the dividend paid per common unit of our operating partnership. Such dividends were paid on September 3, 2015.

On November 3, 2015, the board of directors declared a dividend for the third quarter of 2015 in the amount of $0.22 per share of common stock and per common unit of our operating partnership, outstanding to stockholders and common unit holders of record as of the close of business on November 17, 2015. Our board of directors also declared a dividend for the third quarter of 2015 for each LTIP unit in an amount equal to 10% of the dividend paid per common unit of our operating partnership. Such dividends are to be paid on December 3, 2015.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
-Section S99
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-Subparagraph (SAB TOPIC 4.E)
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
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-Name Accounting Standards Codification
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-Subparagraph (SAB TOPIC 4.C)
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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (SX 210.3-04)
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

+ Details

Earnings Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

7. Earnings Per Share

Basic earnings or loss per share of common stock (“EPS”) is calculated by dividing net income or loss attributable to common stockholders by the weighted average shares of common stock outstanding for the periods presented. Diluted EPS is computed after adjusting the basic EPS computation for the effect of dilutive common equivalent shares outstanding during the periods presented. Unvested restricted shares and LTIP units are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. The following table sets for the computation of the Company’s basic and diluted earnings per share of common stock for the three and nine months ended September 30, 2015 (amounts in thousands, except per share amounts):

	For the three months ended			For the nine months ended
	September 30, 2015			September 30, 2015
Numerator
Net income (loss)	$	818		$	(6,218	)
Less: Non-controlling interest in predecessor		—			—
Less: Non-controlling interest in operating partnership		(320	)		4,419
Net income (loss) available to Easterly Government Properties, Inc.		498			(1,799	)
Less: Dividends on participating securities		(24	)		(37	)
Net income (loss) available to common stockholders	$	474		$	(1,836	)
Denominator for basic EPS		24,141,712			20,516,184
Dilutive effect of share-based compensation awards		12,072			—
Dilutive effect of LTIP units		1,062,932			—
Denominator for basic and diluted EPS		25,216,716			20,516,184
Basic EPS	$	0.02		$	(0.09	)
Diluted EPS	$	0.02		$	(0.09	)

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Real Estate Properties

Category		Term
Buildings		40 years
Building improvements		5 - 40 years
Tenant improvements		Shorter of remaining life of the lease or useful life
Furniture and equipment		3 - 7 years

Cash and Cash Equivalents

Restricted Cash

Restricted cash consists of amounts escrowed for future real estate taxes, insurance, capital expenditures and debt service, as required by certain of our mortgage debt agreements.

Deferred Financing Costs

Revenue Recognition

Income Taxes

Stock Based Compensation

Earnings Per Share of Common Stock Amount

Deferred Offering Costs

Segments

Application of new accounting standards

Real Estate Investments

Fair Value of Investments

Level 1		Valuation is based upon quoted prices for identical assets or liabilities in an active market.

Level 2		Valuation is based upon observable inputs:

		a) Quoted prices for similar assets or liabilities in active markets,

		b) Quoted prices for identical or similar assets or liabilities in not active markets, or

		c) Model-based valuation techniques for which all significant assumptions are observable in the market.

Level 3		Valuation is based upon prices or valuation techniques that require assumptions not observable in the market which are significant to the overall fair value measurement. These unobservable inputs reflect the Predecessor’s own estimates about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). Valuation techniques include the use of discounted cash flow models, and similar techniques.

Non-controlling Interests

Non-Controlling Interests

Non-Controlling Interest

Real Estate and Intangibles (Tables)

9 Months Ended

Sep. 30, 2015

Real Estate [Abstract]

Summary of Real Estate Properties Acquired in Formation Transactions

As part of the formation transactions, we acquired the following properties, as set forth in the table below:

Property	Location	Property Type	Rentable Square Feet
Easterly Portfolio
IRS - Fresno	Fresno, CA	Office		180,481
PTO- Arlington	Arlington, VA	Office		189,871
FBI - San Antonio	San Antonio, TX	Office		148,584
FBI - Omaha	Omaha, NE	Office		112,196
ICE - Charleston	North Charleston, SC	Office		86,733
DOT - Lakewood	Lakewood, CO	Office		122,225
USFS II - Albuquerque	Albuquerque, TX	Office		98,720
USFS I - Albuquerque	Albuquerque, TX	Office		92,455
AOC - Del Rio	Del Rio, TX	Courthouse/Office		89,880
DEA - Dallas	Dallas, TX	Office		71,827
DEA - Albany	Albany, NY	Office		31,976
FBI - Little Rock	Little Rock, AR	Office		101,977
CBP - Sunburst	Sunburst, MT	Office		33,000
USCG - Martinsburg	Martinsburg, WV	Office		59,547
MEPCOM - Jacksonville	Jacksonville, FL	Office		30,000
		Total		1,449,472

Western Devcon
CBP - Savannah	Savannah, GA	Laboratory		35,000
AOC - El Centro	El Centro, TX	Courthouse/Office		46,813
DEA - Vista	Vista, CA	Laboratory		54,119
DEA - Santa Ana	Santa Ana, CA	Office		39,905
CBP - Chula Vista	Chula Vista, CA	Office		59,397
DEA - North Highlands	Sacramento, CA	Office		37,975
DEA - Otay	San Diego, CA	Office		32,560
DEA - Riverside	Riverside, CA	Office		34,354
SSA - Mission Viejo	Mission Viejo, CA	Office		11,590
SSA - San Diego	San Diego, CA	Office		11,743
DEA - San Diego	San Diego, CA	Warehouse		16,100
2650 SW 145th Avenue - Parbel of Florida	Miramar, FL	Warehouse/Distribution		81,721
5998 Osceola Court - United Technologies	Midland, GA	Manufacturing Warehouse		105,641
501 East Hunter Street - Lummus Corporation	Lubbock, TX	Distribution		70,078
		Total		636,996

Fair Values of Assets Acquired and Liabilities Assumed

The fair values of the assets acquired and liabilities assumed upon completion of the formation transactions are as follows (dollars in thousands):

	Easterly Portfolio			Western Devcon, Inc.			Total
Real estate
Land	$	43,681		$	35,573		$	79,254
Building		411,472			107,424			518,896
Acquired tenant improvements		27,441			4,388			31,829
Total real estate		482,594			147,385			629,979
Intangible assets
In-place leases		61,218			21,308			82,526
Acquired leasing commissions		11,257			4,350			15,607
Above-market leases		2,644			7,763			10,407
Total intangible assets		75,119			33,421			108,540
Intangible liabilities
Below-market leases		(34,383	)		(2,322	)		(36,705	)
Total intangible liabilities		(34,383	)		(2,322	)		(36,705	)
Debt assumed		(271,622	)		(92,087	)		(363,709	)
Net current assets transferred		8,979			—			8,979
Net assets acquired	$	260,687		$	86,397		$	347,084

Post Formation Acquisition Activities

	Total
Real estate
Land	$	4,776
Building		43,767
Acquired tenant improvements		759
Total real estate		49,302
Intangible assets
In-place leases		7,060
Acquired leasing commissions		1,736
Above-market leases		48
Total intangible assets		8,844
Intangible liabilities
Below-market leases		(7,221	)
Total intangible liabilities		(7,221	)
Purchase price	$	50,925

Proforma Financial Information of Future Operating Results

The pro forma information is not necessarily indicative of the results that actually would have occurred nor does it intend to indicate future operating results (dollars in thousands):

	For the nine months ended September 30,
Proforma (unaudited)	2015		2014
Total rental revenue	$	60,356	$	60,356
Net income (loss) ⁽¹⁾		3,760		224

Schedule of Real Estate and Intangibles

Real estate and intangibles consisted of the following as of September 30, 2015 (dollars in thousands):

	Total
Real estate
Land	$	84,030
Building		562,961
Acquired tenant improvements		32,588
Accumulated amortization		(11,545	)
Total Real Estate	$	668,034
Intangible assets
In-place leases	$	89,586
Acquired leasing commissions		17,343
Above market leases		10,454
Accumulated amortization		(12,726	)
Total Intangible assets	$	104,657
Intangible liabilities
Below market leases	$	(43,926	)
Accumulated amortization		4,236
Total Intangible liabilities	$	(39,690	)

Amortization of Total Intangible Assets and Intangible Liabilities

The net projected amortization of total intangible assets and intangible liabilities as of September 30, 2015 are as follows (dollars in thousands):

	Total

Intangible assets
2015		5,263
2016		20,020
2017		18,603
2018		15,199
2019		10,427
Thereafter		35,145
	$	104,657
Intangible liabilities
2015		(1,733	)
2016		(6,812	)
2017		(6,614	)
2018		(6,249	)
2019		(4,504	)
Thereafter		(13,778	)
	$	(39,690	)

Debt (Tables)

9 Months Ended

Sep. 30, 2015

Summary of Borrowings

At September 30, 2015, our borrowings consisted of the following (dollars in thousands):

	Total
Senior unsecured revolving credit facility	$	50,167
Mortgage debt		68,756
Total	$	118,923

Summary of Aggregate Debt Pay Downs

The Company’s aggregate debt maturities based on outstanding principal as of September 30, 2015 are as follows (dollars in thousands):

	Total
2015	$	650
2016		2,857
2017		2,977
2018		3,100
2019		53,396
Thereafter		55,375
		118,355
Unamortized fair value adjustments		568
	$	118,923

Mortgage Debt [Member]

Summary of Mortgage Debt

The table below provides a summary of our mortgage debt at September 30, 2015 (dollars in thousands):

Property	Fixed/Floating	Contractual Interest Rate			Effective Interest Rate			Maturity Date	Principal Balance		Premium/Discount			Carrying Value
CBP - Savannah	Fixed		3.40	%		4.12	%	July 2033	$	15,745	$	(872	)	$	14,873
ICE - Charleston	Fixed		4.21	%		3.93	%	January 2027		22,253		415			22,668
MEPCOM - Jacksonville	Fixed		4.41	%		3.89	%	October 2025		12,690		335			13,025
USFS II - Albuquerque	Fixed		4.46	%		3.92	%	July 2026		17,500		690			18,190
Total									$	68,188	$	568		$	68,756

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Summary of Changes In Stockholders Equity

The following table summarizes the changes in our stockholders equity for the nine months ended September 30, 2015 (dollars in thousands):

	Shares			Common Shares Par Value		Additional Paid-in Capital			Retained (deficit)			Distributions in Excess of Earnings			Non- controlling Interest in Operating Partnership			Member Capital / (Deficit)			Non- controlling Interests			Total Equity
Balance at December 31, 2014		1,000		$	—	$	1		$	—		$	—		$	—		$	13,336		$	283,847		$	297,184
Distributions					—		—			—			—			—			(9	)		(5,432	)		(5,441	)
Exchange of members' capital and non controlling interests for OP units and shares		3,308,000			33		67,312			—			—			194,530			(12,738	)		(249,137	)		—
Public Offering		13,800,000			138		191,445			—			—			—			—			—			191,583
Proceeds of private placement		7,033,712			70		105,435			—			—			—			(589	)		(29,278	)		75,638
Contribution of Western Devcon Properties for OP units					—		—			—			—			86,397			—			—			86,397
Stock based compensation					—		209			—			—			966			—			—			1,175
Grant of unvested restricted stock		26,667			—		—			—			—			—			—			—			—
Buyback of common stock		(1,000	)		—		(1	)		—			—			—			—			—			(1	)
Dividends and distributions paid					—		—			—			(7,734	)		(4,998	)		—			—			(12,732	)
Net loss					—		—			(1,799	)		—			(4,419	)		—			—			(6,218	)
Allocation of NCI in Operating Partnership					—		26,956			—			—			(26,956	)		—			—			—
Balance at September 30, 2015		24,168,379		$	241	$	391,357		$	(1,799	)	$	(7,734	)	$	245,520		$	—		$	—		$	627,585

Organization and Basis of Presentation - Additional Information (Detail) $ / shares in Units, ft² in Millions, $ in Millions		9 Months Ended
	Feb. 11, 2015 USD ($) Property $ / shares shares	Sep. 30, 2015 ft² Property $ / shares shares	Dec. 31, 2014 shares
Organization And Significant Accounting Policies [Line Items]
Gross proceeds from initial public offering \| $	$ 207.0
Common stock shares sold		24,168,379	1,000
Outstanding common units of partnership interest owned percentage		60.90%
Noncontrolling interest, ownership percentage by noncontrolling owners		39.10%
Western Devcon, Inc [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property	14	14
Number of stock units exchanged	5,759,819	5,759,819
Management Entities [Member]
Organization And Significant Accounting Policies [Line Items]
Number of stock units exchanged	1,135,406
Easterly Funds [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property	15
Common stock shares exchanged	3,308,000
Number of stock units exchanged	8,635,714
IPO [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property	15
Shares issued, number of shares	13,800,000
Shares issued, price per share \| $ / shares	$ 15.00
Net proceeds from initial public offering \| $	$ 191.6
Over-Allotment Option [Member]
Organization And Significant Accounting Policies [Line Items]
Shares issued, number of shares	1,800,000
Private Placement [Member]
Organization And Significant Accounting Policies [Line Items]
Shares issued, number of shares	7,033,712
Shares issued, price per share \| $ / shares	$ 15.00
Common stock shares sold		7,033,712
Par value per share \| $ / shares		$ 15.00
Wholly Owned Properties [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property		32
Aggregate area of land \| ft²		2.3
Wholly Owned Properties [Member] \| Government [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property		29
Wholly Owned Properties [Member] \| Private Tenants [Member]
Organization And Significant Accounting Policies [Line Items]
Number of properties \| Property		3

Real Estate and Intangibles - Additional Information (Detail) $ in Thousands		3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 11, 2015 Property shares	Sep. 30, 2015 USD ($) Property	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Property	Sep. 30, 2015 USD ($) Property shares	Sep. 30, 2014 USD ($)
Real Estate Properties [Line Items]
Purchase price		$ 347,084		$ 347,084	$ 347,084
Weighted average amortization period					7 years 4 months 17 days
Net loss/income		498	$ (3,309)		$ (1,799)	$ (4,664)
Acquisition-related costs		$ 235			1,870
Formation expenses					$ 1,666
Consolidated Properties [Member]
Real Estate Properties [Line Items]
Revenues				49,200
Net loss/income				$ 10,400
Western Devcon, Inc [Member]
Real Estate Properties [Line Items]
Percentage of ownership		100.00%		100.00%	100.00%
Number of properties \| Property	14	14		14	14
Number of stock units exchanged \| shares	5,759,819				5,759,819
Amount of stock units exchanged					$ 86,400
Purchase price		$ 86,397		$ 86,397	$ 86,397
DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Real Estate Properties [Line Items]
Number of properties \| Property		3		3	3
Purchase price		$ 50,925		$ 50,925	$ 50,925
Western Devcon and DOE - Lakewood, AOC - Aberdeen and - ICE - Otay [Member]
Real Estate Properties [Line Items]
Acquisition-related costs					1,900
Formation expenses					$ 1,700

Real Estate and Intangibles - Schedule of Transactions of Acquired Properties (Detail)	9 Months Ended
	Sep. 30, 2015 ft²
Easterly Partner LLC [Member]
Real Estate Properties [Line Items]
Rentable Square Feet	1,449,472
Easterly Partner LLC [Member] \| IRS Fresno [Member]
Real Estate Properties [Line Items]
Location	Fresno, CA
Property type	Office
Rentable Square Feet	180,481
Easterly Partner LLC [Member] \| PTO Arlington [Member]
Real Estate Properties [Line Items]
Location	Arlington, VA
Property type	Office
Rentable Square Feet	189,871
Easterly Partner LLC [Member] \| FBI San Antonio [Member]
Real Estate Properties [Line Items]
Location	San Antonio, TX
Property type	Office
Rentable Square Feet	148,584
Easterly Partner LLC [Member] \| FBI Omaha [Member]
Real Estate Properties [Line Items]
Location	Omaha, NE
Property type	Office
Rentable Square Feet	112,196
Easterly Partner LLC [Member] \| ICE Charleston [Member]
Real Estate Properties [Line Items]
Location	North Charleston, SC
Property type	Office
Rentable Square Feet	86,733
Easterly Partner LLC [Member] \| DOT Lakewood [Member]
Real Estate Properties [Line Items]
Location	Lakewood, CO
Property type	Office
Rentable Square Feet	122,225
Easterly Partner LLC [Member] \| USFS Two Albuquerque [Member]
Real Estate Properties [Line Items]
Location	Albuquerque, TX
Property type	Office
Rentable Square Feet	98,720
Easterly Partner LLC [Member] \| USFS One Albuquerque [Member]
Real Estate Properties [Line Items]
Location	Albuquerque, TX
Property type	Office
Rentable Square Feet	92,455
Easterly Partner LLC [Member] \| AOC Del Rio [Member]
Real Estate Properties [Line Items]
Location	Del Rio, TX
Property type	Courthouse/Office
Rentable Square Feet	89,880
Easterly Partner LLC [Member] \| DEA Dallas [Member]
Real Estate Properties [Line Items]
Location	Dallas, TX
Property type	Office
Rentable Square Feet	71,827
Easterly Partner LLC [Member] \| DEA Albany [Member]
Real Estate Properties [Line Items]
Location	Albany, NY
Property type	Office
Rentable Square Feet	31,976
Easterly Partner LLC [Member] \| FBI Little Rock [Member]
Real Estate Properties [Line Items]
Location	Little Rock, AR
Property type	Office
Rentable Square Feet	101,977
Easterly Partner LLC [Member] \| CBP Sunburst [Member]
Real Estate Properties [Line Items]
Location	Sunburst, MT
Property type	Office
Rentable Square Feet	33,000
Easterly Partner LLC [Member] \| USCG Martinsburg [Member]
Real Estate Properties [Line Items]
Location	Martinsburg, WV
Property type	Office
Rentable Square Feet	59,547
Easterly Partner LLC [Member] \| MEPCOM Jacksonville [Member]
Real Estate Properties [Line Items]
Location	Jacksonville, FL
Property type	Office
Rentable Square Feet	30,000
Western Devcon, Inc [Member]
Real Estate Properties [Line Items]
Rentable Square Feet	636,996
Western Devcon, Inc [Member] \| CBP Savannah [Member]
Real Estate Properties [Line Items]
Location	Savannah, GA
Property type	Laboratory
Rentable Square Feet	35,000
Western Devcon, Inc [Member] \| AOC El Centro [Member]
Real Estate Properties [Line Items]
Location	El Centro, TX
Property type	Courthouse/Office
Rentable Square Feet	46,813
Western Devcon, Inc [Member] \| DEA Vista [Member]
Real Estate Properties [Line Items]
Location	Vista, CA
Property type	Laboratory
Rentable Square Feet	54,119
Western Devcon, Inc [Member] \| DEA Santa Ana [Member]
Real Estate Properties [Line Items]
Location	Santa Ana, CA
Property type	Office
Rentable Square Feet	39,905
Western Devcon, Inc [Member] \| CBP Chula Vista [Member]
Real Estate Properties [Line Items]
Location	Chula Vista, CA
Property type	Office
Rentable Square Feet	59,397
Western Devcon, Inc [Member] \| DEA North Highlands [Member]
Real Estate Properties [Line Items]
Location	Sacramento, CA
Property type	Office
Rentable Square Feet	37,975
Western Devcon, Inc [Member] \| DEA Otay [Member]
Real Estate Properties [Line Items]
Location	San Diego, CA
Property type	Office
Rentable Square Feet	32,560
Western Devcon, Inc [Member] \| DEA Riverside [Member]
Real Estate Properties [Line Items]
Location	Riverside, CA
Property type	Office
Rentable Square Feet	34,354
Western Devcon, Inc [Member] \| SSA Mission Viejo [Member]
Real Estate Properties [Line Items]
Location	Mission Viejo, CA
Property type	Office
Rentable Square Feet	11,590
Western Devcon, Inc [Member] \| SSA San Diego [Member]
Real Estate Properties [Line Items]
Location	San Diego, CA
Property type	Office
Rentable Square Feet	11,743
Western Devcon, Inc [Member] \| DEA San Diego [Member]
Real Estate Properties [Line Items]
Location	San Diego, CA
Property type	Warehouse
Rentable Square Feet	16,100
Western Devcon, Inc [Member] \| 2650 SW 145th Avenue - Parbel of Florida [Member]
Real Estate Properties [Line Items]
Location	Miramar, FL
Property type	Warehouse/Distribution
Rentable Square Feet	81,721
Western Devcon, Inc [Member] \| 5998 Osceola Court - United Technologies [Member]
Real Estate Properties [Line Items]
Location	Midland, GA
Property type	Manufacturing Warehouse
Rentable Square Feet	105,641
Western Devcon, Inc [Member] \| Distribution [Member] \| 501 East Hunter Street - Lummus Corporation [Member]
Real Estate Properties [Line Items]
Location	Lubbock, TX
Property type	Distribution
Rentable Square Feet	70,078

Real Estate and Intangibles - Fair Values of Assets Acquired and Liabilities Assumed (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Total real estate	$ 629,979
Total Intangibles	108,540
Total Deferred Market Liabilities	(36,705)
Debt assumed	(363,709)
Net current assets transferred	8,979
Net assets acquired	347,084
Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Total real estate	482,594
Total Intangibles	75,119
Total Deferred Market Liabilities	(34,383)
Debt assumed	(271,622)
Net current assets transferred	8,979
Net assets acquired	260,687
Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Total real estate	147,385
Total Intangibles	33,421
Total Deferred Market Liabilities	(2,322)
Debt assumed	(92,087)
Net assets acquired	86,397
DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Total real estate	49,302
Total Intangibles	8,844
Total Deferred Market Liabilities	(7,221)
Net assets acquired	50,925
Real Estate Investment [Member]
Business Acquisition [Line Items]
Land	79,254
Building	518,896
Acquired tenant improvements	31,829
Real Estate Investment [Member] \| Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Land	43,681
Building	411,472
Acquired tenant improvements	27,441
Real Estate Investment [Member] \| Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Land	35,573
Building	107,424
Acquired tenant improvements	4,388
Real Estate Investment [Member] \| DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Land	4,776
Building	43,767
Acquired tenant improvements	759
In-place leases [Member]
Business Acquisition [Line Items]
Total Intangibles	82,526
In-place leases [Member] \| Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Total Intangibles	61,218
In-place leases [Member] \| Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Total Intangibles	21,308
In-place leases [Member] \| DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Total Intangibles	7,060
Acquired Leasing Commissions [Member]
Business Acquisition [Line Items]
Total Intangibles	15,607
Acquired Leasing Commissions [Member] \| Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Total Intangibles	11,257
Acquired Leasing Commissions [Member] \| Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Total Intangibles	4,350
Acquired Leasing Commissions [Member] \| DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Total Intangibles	1,736
Above Market Leases [Member]
Business Acquisition [Line Items]
Total Intangibles	10,407
Above Market Leases [Member] \| Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Total Intangibles	2,644
Above Market Leases [Member] \| Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Total Intangibles	7,763
Above Market Leases [Member] \| DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Total Intangibles	48
Below Market Leases [Member]
Business Acquisition [Line Items]
Total Deferred Market Liabilities	(36,705)
Below Market Leases [Member] \| Easterly Partner LLC [Member]
Business Acquisition [Line Items]
Total Deferred Market Liabilities	(34,383)
Below Market Leases [Member] \| Western Devcon, Inc [Member]
Business Acquisition [Line Items]
Total Deferred Market Liabilities	(2,322)
Below Market Leases [Member] \| DOE - Lakewood and AOC - Aberdeen and ICE - Otay [Member]
Business Acquisition [Line Items]
Total Deferred Market Liabilities	$ (7,221)

Debt - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
Debt - Additional Information (Detail) - USD ($)	Sep. 30, 2015	Sep. 30, 2015	Feb. 11, 2015
Debt Instrument [Line Items]
Percentage of minimum proceeds from common stock issuance under covenant		75.00%
Revolving credit facility, Covenant Terms, Minimum EBITDA to Fixed Charges Ratio		1.50%
Outstanding borrowings	$ 50,167,000	$ 50,167,000
Mortgage Debt [Member]
Debt Instrument [Line Items]
Secured nonrecourse debt	293,400,000	293,400,000
Letters of Credit [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 200,000	200,000
Credit facility draws, net		$ 0
Maximum [Member]
Debt Instrument [Line Items]
Total indebtedness to total asset value under covenant	60.00%	60.00%
Unsecured indebtedness to unencumbered asset value under covenant		60.00%
Percentage of fund flow from operation under covenant		95.00%
Minimum [Member]
Debt Instrument [Line Items]
Percentage of minimum tangible net worth under covenant		75.00%
Net operating income from unencumbered assets to interest payable on unsecured debt under covenant		1.75%
Federal Funds [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		0.50%
Federal Funds [Member] \| One Month Libor [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		1.00%
Federal Funds [Member] \| Maximum [Member] \| One Month Libor [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		0.90%
Federal Funds [Member] \| Minimum [Member] \| One Month Libor [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		0.40%
Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility current borrowing capacity	$ 400,000,000	$ 400,000,000	$ 400,000,000
Credit facility additional maximum borrowing capacity			250,000,000
Credit facility maximum borrowing capacity			$ 650,000,000
Debt instrument, termination year		4 years
Line of Credit Facility, Description		In addition, there will be two extension options for the senior unsecured revolving credit facility and each extension option will allow us to extend the senior unsecured revolving credit facility for an additional six months, in each case if certain conditions are satisfied.
Debt Instrument, Description		A fluctuating rate equal to the sum of (a) the highest of (x) Citibank, N.A.'s base rate, (y) the federal funds effective rate plus 0.50% and (z) the one-month LIBOR rate plus 1.00% plus (b) a margin ranging from 0.4% to 0.9%, or a Eurodollar rate equal to a periodic fixed rate equal to LIBOR plus, a margin ranging from 1.4% to 1.9%, in each case with a margin based on our leverage ratio.
Revolving credit facility, covenant terms		(i) the maximum ratio of consolidated total indebtedness to total asset value (each as defined in the agreement) may not exceed 60.0% on any date, provided that the maximum ratio may be increased to 65.0% for the two consecutive quarters following the date on which a material acquisition (as defined in the agreement) occurs, (ii) the maximum ratio of consolidated secured indebtedness (as defined in the agreement) to total asset value may not exceed 40.0% on any date, (iii) the maximum ratio of consolidated secured recourse indebtedness (as defined in the agreement) to total asset value may not exceed 15% on any date, (iv) the minimum consolidated tangible net worth (as defined in the agreement) may not, on any date, be less than the sum of an amount equal to 75.0% of our consolidated tangible net worth as of the closing date of the facility plus an amount equal to 75.0% of the aggregate net cash proceeds received by us from any offering of our capital stock after the closing date of the facility, (v) the minimum ratio of adjusted consolidated EBITDA to consolidated fixed charges (each as defined in the agreement) may not be less than 1.50 to 1.00 on any date, (vi) the maximum ratio of consolidated unsecured indebtedness to unencumbered asset value (each as defined in the agreement) may not exceed 60% as of any date and (vii) the minimum ratio of adjusted consolidated net operating income from unencumbered assets (as defined in the agreement) to interest payable on unsecured debt (as determined in accordance with the agreement) shall not be less than 1.75 to 1.00 on any date. Additionally, under the proposed revolving credit facility, our distributions may not exceed the greater of (i) 95.0% of our FFO or (ii) the amount required for us to maintain our status as a REIT and avoid the payment of federal or state income or excise tax.
Interest rate payable on borrowings	1.61%	1.61%
Weighted average annual interest rate	1.60%	1.59%
Outstanding borrowings	$ 50,167,000	$ 50,167,000
Amount available under revolving credit facility	$ 349,800,000	$ 349,800,000
Senior Unsecured Revolving Credit Facility [Member] \| Maximum [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		1.90%
Senior Unsecured Revolving Credit Facility [Member] \| Minimum [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin		1.40%
Conditional [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Total indebtedness to total asset value under covenant	65.00%	65.00%
Secured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Total indebtedness to total asset value under covenant	40.00%	40.00%
Recourse Indebtedness [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Total indebtedness to total asset value under covenant	15.00%	15.00%

Debt - Summary of Aggregate Debt Pay Downs (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Debt Disclosure [Abstract]
2015	$ 650
2016	2,857
2017	2,977
2018	3,100
2019	53,396
Thereafter	55,375
Debt instrument carrying amount	118,355
Unamortized fair value adjustments	568
Long term debt	$ 118,923

Equity - Summary of Changes In Stockholders Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Shareholders Equity [Line Items]
Balance at December 31, 2014			$ 297,184
Distributions			(5,441)
Public Offering			191,583
Proceeds of private placement			75,638
Contribution of Western Devcon Properties for OP units			86,397
Stock based compensation			1,175
Buyback of common stock			(1)
Dividends and distributions paid			(12,732)
Net loss	$ 818	$ 23,032	(6,218)	$ 71,166
Allocation of NCI in Operating Partnership	245,520		245,520
Balance at September 30, 2015	$ 627,585		$ 627,585
Balance at December 31, 2014, Shares			1,000
Exchange of members' capital and non controlling interests for OP units and shares, shares			3,308,000
controlling interests for OP units and			13,800,000
shares			7,033,712
Grant of unvested restricted stock, Shares			26,667
Buyback of common stock, Shares			(1,000)
Balance at September 30, 2015, Shares	24,168,379		24,168,379
Common Stock Par Value [Member]
Shareholders Equity [Line Items]
Exchange of members' capital and non controlling interests for OP units and shares			$ 33
Public Offering			138
Proceeds of private placement			70
Balance at September 30, 2015	$ 241		241
Additional Paid-in Capital [Member]
Shareholders Equity [Line Items]
Balance at December 31, 2014			1
Exchange of members' capital and non controlling interests for OP units and shares			67,312
Public Offering			191,445
Proceeds of private placement			105,435
Stock based compensation			209
Buyback of common stock			(1)
Allocation of NCI in Operating Partnership	26,956		26,956
Balance at September 30, 2015	391,357		391,357
Dividends in Excess of Earnings [Member]
Shareholders Equity [Line Items]
Balance at September 30, 2015	(1,799)		(1,799)
Distributions in Excess of Earnings [Member]
Shareholders Equity [Line Items]
Dividends and distributions paid			(7,734)
Balance at September 30, 2015	(7,734)		(7,734)
Non-controlling Interest in Operating Partnership [Member]
Shareholders Equity [Line Items]
Exchange of members' capital and non controlling interests for OP units and shares			194,530
Contribution of Western Devcon Properties for OP units			86,397
Stock based compensation			966
Dividends and distributions paid			(4,998)
Allocation of NCI in Operating Partnership	(26,956)		(26,956)
Balance at September 30, 2015	$ 245,520		245,520
Member Capital / (Deficit) [Member]
Shareholders Equity [Line Items]
Balance at December 31, 2014			13,336
Distributions			(9)
Exchange of members' capital and non controlling interests for OP units and shares			(12,738)
Proceeds of private placement			(589)
Partnership [Member]
Shareholders Equity [Line Items]
Net loss			(6,218)
Partnership [Member] \| Dividends in Excess of Earnings [Member]
Shareholders Equity [Line Items]
Net loss			(1,799)
Partnership [Member] \| Non-controlling Interest in Operating Partnership [Member]
Shareholders Equity [Line Items]
Net loss			(4,419)
Easterly Partners, LLC [Member] \| Non-controlling Interest in Operating Partnership [Member]
Shareholders Equity [Line Items]
Balance at December 31, 2014			283,847
Distributions			(5,432)
Exchange of members' capital and non controlling interests for OP units and shares			(249,137)
Proceeds of private placement			$ (29,278)

Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands						3 Months Ended	9 Months Ended
	Nov. 03, 2015 $ / shares	Aug. 04, 2015 $ / shares	May 06, 2015 $ / shares shares	Feb. 11, 2015 USD ($) Property $ / shares shares	Oct. 16, 2014 USD ($) shares	Sep. 30, 2015 USD ($) Property shares	Sep. 30, 2015 USD ($) Property shares	Dec. 31, 2014 shares
Stockholders Equity Note Disclosure [Line Items]
Gross proceeds from initial public offering \| $				$ 207,000
Cash based awards with respect to equity incentive plans \| $							$ 5,000
Stock-based awards with respect to equity incentive plans						2,273,959	2,273,959
Common stock issued to non-employee directors							26,667
Unrecognized compensation expense \| $						$ 6,900	$ 6,900
Common Stock, shares issued						24,168,379	24,168,379	1,000
Dividends per share \| $ / shares	$ 0.22	$ 0.21
Dividends payable, date of record	Nov. 17, 2015	Aug. 18, 2015
Operating partnership dividend rate percentage	10.00%	10.00%	10.00%
Dividends payable, date to be paid	Dec. 03, 2015	Sep. 03, 2015
Dividends payable, date declared	Nov. 03, 2015	Aug. 04, 2015
Board of Directors [Member]
Stockholders Equity Note Disclosure [Line Items]
Dividends per share \| $ / shares			$ 0.11
Dividends payable, date of record			May 18, 2015
Long Term Incentive Plan [Member]
Stockholders Equity Note Disclosure [Line Items]
Issuing of LTIP units of limited partnership interest			891,000
Tranche One [Member] \| Long Term Incentive Plan [Member]
Stockholders Equity Note Disclosure [Line Items]
Percentage of shares vest under long term incentive plan			50.00%
Tranche Two [Member] \| Long Term Incentive Plan [Member]
Stockholders Equity Note Disclosure [Line Items]
Percentage of shares vest under long term incentive plan			50.00%
2015 Equity Incentive Plan [Member]
Stockholders Equity Note Disclosure [Line Items]
Common stock reserved for future issuance under equity incentive plans						2,273,959	2,273,959
Common stock issued to non-employee directors							26,667
Compensation expense recognized \| $						$ 700	$ 1,200
Common Stock, shares issued						0	0
Lock-up period							180 days
Maximum [Member]
Stockholders Equity Note Disclosure [Line Items]
Percentage of exercise price of option over fair market value of common stock							100.00%
Share based compensation, term of options							10 years
IPO [Member]
Stockholders Equity Note Disclosure [Line Items]
Shares issued, number of shares				13,800,000
Shares issued, price per share \| $ / shares				$ 15.00
Number of properties \| Property				15
Over-Allotment Option [Member]
Stockholders Equity Note Disclosure [Line Items]
Shares issued, number of shares				1,800,000
Private Placement [Member]
Stockholders Equity Note Disclosure [Line Items]
Shares issued, number of shares				7,033,712
Shares issued, price per share \| $ / shares				$ 15.00
Common Stock, shares issued						7,033,712	7,033,712
Western Devcon, Inc [Member]
Stockholders Equity Note Disclosure [Line Items]
Number of properties \| Property				14		14	14
Common units issued upon acquisition				5,759,819			5,759,819
Common Stock Par Value [Member]
Stockholders Equity Note Disclosure [Line Items]
Shares issued, number of shares					1,000
Shares issued, value \| $					$ 1
Common Stock Par Value [Member] \| IPO [Member]
Stockholders Equity Note Disclosure [Line Items]
Shares issued upon acquisition				3,308,000
Common Units [Member] \| IPO [Member]
Stockholders Equity Note Disclosure [Line Items]
Common units issued upon acquisition				9,771,120
Common Units [Member] \| Western Devcon, Inc [Member]
Stockholders Equity Note Disclosure [Line Items]
Common units issued upon acquisition				5,759,819

Earnings Per Share - Summary of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share Basic And Diluted [Line Items]
Net income (loss)	$ 818	$ 23,032	$ (6,218)	$ 71,166
Less: Non-controlling interest	(320)		4,419
Net income (loss) available to Easterly Government Properties, Inc.	498	(3,309)	(1,799)	(4,664)
Less: Dividends on participating securities	(24)		(37)
Net income (loss) available to common stockholders	$ 474		$ (1,836)
Denominator for basic EPS	24,141,712		20,516,184
Denominator for basic and diluted EPS	25,216,716		20,516,184
Basic EPS	$ 0.02		$ (0.09)
Diluted EPS	$ 0.02		$ (0.09)
Stock Compensation Plan
Earnings Per Share Basic And Diluted [Line Items]
Dilutive effect	12,072
Long Term Incentive Plan [Member]
Earnings Per Share Basic And Diluted [Line Items]
Dilutive effect	1,062,932
Easterly Partners, LLC [Member]
Earnings Per Share Basic And Diluted [Line Items]
Less: Non-controlling interest		$ (26,341)		$ (75,830)

Concentrations Risk	9 Months Ended
Concentrations Risk	Sep. 30, 2015
Risks And Uncertainties [Abstract]
Concentrations Risk	10. Concentrations Risk Concentrations of credit risk arise for the Company when multiple tenants of the Company are engaged in similar business activities, are located in the same geographic region or have similar economic features that impact in a similar manner their ability to meet contractual obligations, including those to the Company. The Company regularly monitors its tenant base to assess potential concentrations of credit risk. As stated in Note 1 above, the Company leases commercial space to the U.S. Government through the GSA or other federal agencies or nongovernmental tenants. At September 30, 2015, the GSA and other federal agency accounted for approximately 96% of rental income and non-governmental tenants accounted for the remaining approximately 4%. Twelve of our 32 properties are located in California, accounting for approximately 25% of our total rentable square feet and approximately 33% of our total annualized lease income as of September 30, 2015. To the extent that weak economic or real estate conditions or natural disasters affect California more severely than other areas of the country, our business, financial condition and results of operations could be negatively impacted.

Related Party	9 Months Ended
Related Party	Sep. 30, 2015
Related Party Transactions [Abstract]
Related Party	11. Related Party Upon completion of the IPO, we were responsible for reimbursing Easterly Capital less than $0.1 million for the three months ended September 30, 2015 and $0.3 million for the nine months ended September 30, 2015 for a portion of rent and office expense at their Beverly, MA office and for the services of certain employees. Additionally, during the three and nine months ended September 30, 2015, Western Devcon was responsible for reimbursing us less than $0.1 million and $0.2 million, respectively, for payroll expenses and interest and defeasance costs at closing that we paid on their behalf.

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	12. Subsequent Events For its consolidated financial statements as of September 30, 2015, the Company evaluated subsequent events and noted the following significant events in addition to the dividends declared by the board of directors for the third quarter of 2015 (see Note 6): On October 21, 2015, the Company acquired a 42,480 square foot Drug Enforcement Administration regional laboratory in Pleasanton, CA that was built in 2015 and is leased to the GSA for a 20-year term. The property was acquired from an entity indirectly owned by Michael P. Ibe, a director and the Company’s Executive Vice President—Development and Acquisitions. Concurrently with the acquisition, the Company also entered into a tax protection agreement with Mr. Ibe, under which the Company agreed to indemnify Mr. Ibe for any taxes incurred as a result of a taxable sale of the DEA – Pleasanton property for a period of eight years after the closing of the acquisition and to offer Mr. Ibe and certain affiliates of Mr. Ibe the opportunity to guarantee, in the aggregate, up to approximately $15.7 million of indebtedness of the Operating Partnership for two years following the contribution of the DEA – Pleasanton property and up to approximately $7.2 million of indebtedness thereafter until the eighth anniversary of the closing of the acquisition, subject to certain conditions. The Company also agreed in the tax protection agreement with Mr. Ibe to use the “traditional method” of making allocations under Section 704(c) of the Code for the eight-year period. The Company also entered into a registration rights agreement pursuant to which Mr. Ibe will have the right to cause the Company to register with the SEC the resale or primary issuance of the shares of common stock that Mr. Ibe or his affiliates may receive in exchange for the common units received in the DEA – Pleasanton acquisition and facilitate the offering and sale of such shares.

Summary of Significant Accounting Policies - Summary of Range of useful Lives For Depreciable Assets (Detail)	9 Months Ended
	Sep. 30, 2015
Building [Member]
Property Plant And Equipment [Line Items]
Building improvements	40 years
Building Improvements [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Building improvements	5 years
Building Improvements [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Building improvements	40 years
Furniture and Equipment [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Building improvements	3 years
Furniture and Equipment [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Building improvements	7 years

Real Estate and Intangibles - Amortization of Total Intangible Assets and Intangible Liabilities (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Real Estate [Abstract]
Intangible assets, 2015	$ 5,263
Intangible assets, 2016	20,020
Intangible assets, 2017	18,603
Intangible assets, 2018	15,199
Intangible assets, 2019	10,427
Intangible assets, Thereafter	35,145
Intangible assets, Total	104,657
Intangible liabilities, 2015	(1,733)
Intangible liabilities, 2016	(6,812)
Intangible liabilities, 2017	(6,614)
Intangible liabilities, 2018	(6,249)
Intangible liabilities, 2019	(4,504)
Intangible liabilities, Thereafter	(13,778)
Intangible liabilities, Total	$ (39,690)

Combined Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	200,000,000	100,000
Common Stock, shares issued	24,168,379	1,000
Common Stock, shares outstanding	24,168,379	1,000

Real Estate and Intangibles - Schedule of Real Estate and Intangibles (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Real estate
Land	$ 84,030
Building	562,961
Acquired tenant improvements	32,588
Accumulated amortization	(11,545)
Total Real Estate	668,034
Intangible assets
Above market leases	32,588
Accumulated amortization	(12,726)
Total Intangible assets	104,657
Intangible Liabilities, Below market leases	(43,926)
Intangible Liabilities, Accumulated amortization	4,236
Total Intangible liabilities	39,690
In-place leases [Member]
Real estate
Acquired tenant improvements	89,586
Intangible assets
Above market leases	89,586
Acquired Leasing Commissions [Member]
Real estate
Acquired tenant improvements	17,343
Intangible assets
Above market leases	17,343
Above Market Leases [Member]
Real estate
Acquired tenant improvements	10,454
Intangible assets
Above market leases	$ 10,454

Debt - Summary of Borrowings (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Revolving credit facility	$ 50,167
Long term debt, Total	68,756
Long term debt, Total	118,923
Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 50,167

Debt - Summary of Mortgage Debt (Detail) $ in Thousands	9 Months Ended
Debt - Summary of Mortgage Debt (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Premium/Discount	$ (568)
Carrying Value	118,923
Mortgage Debt [Member]
Debt Instrument [Line Items]
Principal Balance	68,188
Premium/Discount	568
Carrying Value	$ 68,756
Mortgage Debt [Member] \| CBP Savannah [Member]
Debt Instrument [Line Items]
Fixed/Floating	Fixed
Interest rate payable on borrowings	3.40%
Effective Interest Rate	4.12%
Maturity Date	Jul. 31, 2033
Principal Balance	$ 15,745
Premium/Discount	(872)
Carrying Value	$ 14,873
Mortgage Debt [Member] \| ICE Charleston [Member]
Debt Instrument [Line Items]
Fixed/Floating	Fixed
Interest rate payable on borrowings	4.21%
Effective Interest Rate	3.93%
Maturity Date	Jan. 31, 2027
Principal Balance	$ 22,253
Premium/Discount	415
Carrying Value	$ 22,668
Mortgage Debt [Member] \| MEPCOM Jacksonville [Member]
Debt Instrument [Line Items]
Fixed/Floating	Fixed
Interest rate payable on borrowings	4.41%
Effective Interest Rate	3.89%
Maturity Date	Oct. 31, 2025
Principal Balance	$ 12,690
Premium/Discount	335
Carrying Value	$ 13,025
Mortgage Debt [Member] \| USFS II Albuquerque [Member]
Debt Instrument [Line Items]
Fixed/Floating	Fixed
Interest rate payable on borrowings	4.46%
Effective Interest Rate	3.92%
Maturity Date	Jul. 31, 2026
Principal Balance	$ 17,500
Premium/Discount	690
Carrying Value	$ 18,190

Fair value measurements - Level 3 Based Upon Significance of Unobservable Inputs to Overall Fair Value Measurement (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Purchase of investments		$ 30,316
Contributions to investments	$ 257	1,575
Distributions from investments		(5,478)
Net change in unrealized (depreciation) appreciation	(5,122)	71,865
Sale of investments to the Operating Partnership	(262,818)
Ending Balance	$ 0	$ 271,377

Operating Leases - Summary of Future Minimum Rental Payments (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Leases [Abstract]
Minimum lease payments, Total	$ 409,948
Minimum lease payments, 2015	13,567
Minimum lease payments, 2016	53,323
Minimum lease payments, 2017	52,950
Minimum lease payments, 2018	50,425
Minimum lease payments, 2019	45,302
Minimum lease payments, thereafter	$ 194,381

Operating Leases - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015 USD ($) Tenants	Sep. 30, 2015 USD ($) Tenants
Leases [Abstract]
Number of consolidated properties	100.00%	100.00%
Rental income attributable to base rent	$ 16.6	$ 41.5
Number of tenants \| Tenants	18	18
Straight-line rent adjustments	$ 0.1	$ 0.2
Amortization of above and below market leases	$ 1.4	$ 3.4

Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) ft²	Sep. 30, 2014 USD ($)
Commitments And Contingencies [Line Items]
Tax Protection Agreement Period			8 years
Corporate Office Leases [Member]
Commitments And Contingencies [Line Items]
Rent expense \| $	$ 0.1	$ 0.1	$ 0.2	$ 0.1
DISTRICT OF COLUMBIA
Commitments And Contingencies [Line Items]
Area of leased property			4,731
Operating lease agreement expire date			Mar. 31, 2016
California
Commitments And Contingencies [Line Items]
Area of leased property			5,752
Operating lease agreement expire date			Apr. 30, 2017

Commitments and Contingencies - Summary of Future Minimum Rental Payments Under Company's Corporate Office Leases (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Schedule Of Future Minimum Rental Payments For Operating Leases [Line Items]
Minimum lease payments, Total	$ 409,948
Minimum lease payments, 2015	13,567
Minimum lease payments, 2016	53,323
Minimum lease payments, 2017	52,950
Corporate Office Leases [Member]
Schedule Of Future Minimum Rental Payments For Operating Leases [Line Items]
Minimum lease payments, Total	325
Minimum lease payments, 2015	92
Minimum lease payments, 2016	189
Minimum lease payments, 2017	$ 44

Concentrations Risk - Additional Information (Detail)	9 Months Ended
Concentrations Risk - Additional Information (Detail)	Sep. 30, 2015 Property
Wholly Owned Properties [Member]
Concentration Risk [Line Items]
Number of properties	32
California
Concentration Risk [Line Items]
Number of properties	12
Lease Income [Member] \| Credit Concentration Risk [Member] \| California
Concentration Risk [Line Items]
Percentage of concentrations risk	33.00%
Rentable Square Feet [Member] \| Credit Concentration Risk [Member] \| California
Concentration Risk [Line Items]
Percentage of concentrations risk	25.00%
General Services Administration And Other Federal Agencies [Member] \| Lease Income [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of concentrations risk	96.00%
Non Governmental Tenants [Member] \| Lease Income [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of concentrations risk	4.00%

Related Party - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Easterly Capital [Member]
Related Party Transaction [Line Items]
Reimbursable rent and office expense due to related party		$ 0.3
Easterly Capital [Member] \| Maximum [Member]
Related Party Transaction [Line Items]
Reimbursable rent and office expense due to related party	$ 0.1
Western Devcon, Inc [Member]
Related Party Transaction [Line Items]
Reimbursable payroll expenses interest and defeasance costs due from related party		$ 0.2
Western Devcon, Inc [Member] \| Maximum [Member]
Related Party Transaction [Line Items]
Reimbursable payroll expenses interest and defeasance costs due from related party	$ 0.1

Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] $ in Millions	Oct. 21, 2015 USD ($) ft²
Subsequent Event [Line Items]
Property acquisition, area of laboratory acquired \| ft²	42,480
Lease term	20 years
Property acquisition, tax protection committed amount	$ 15.7
Property acquisition, tax protection committed amount, thereafter	$ 7.2
Property Acquisition, tax protection maximum period	8 years

Label	Element	Value
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 267,683,000
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 173,099,000