Peakstone Realty Trust (PKST) 10-K 9 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 07, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	Griffin Capital Essential Asset REIT II, Inc.
Entity Central Index Key	1,600,626
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 748,201,708
Class T
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		23,278
Class S
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		270
Class D
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		270
Class I
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		282,531
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		25,985,155
Class AA
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		50,107,715
Class AAA
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		969,016

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents		$ 33,164	$ 49,340
Restricted cash		12,886	14,221
Land		122,482	117,569
Building		815,721	787,999
Tenant origination and absorption cost		240,364	227,407
Construction in progress		299	80
Total real estate		1,178,866	1,133,055
Less: accumulated depreciation and amortization		(83,905)	(39,955)
Total real estate, net		1,094,961	1,093,100
Intangible assets, net		3,294	3,528
Due from affiliates		686	0
Deferred rent		22,733	5,424
Other assets, net		12,224	18,862
Total assets		1,179,948	1,184,475
LIABILITIES AND EQUITY
Revolving Credit Facility		355,561	330,272
AIG Loan		126,287	126,200
Total debt		481,848	456,472
Restricted reserves		13,368	55,797
Accrued expenses and other liabilities		19,903	21,527
Distributions payable		1,689	1,494
Due to affiliates		16,896	22,481
Below market leases, net		51,295	55,319
Total liabilities		584,999	613,090
Commitments and contingencies
Common stock subject to redemption		32,405	16,930
Stockholders' equity:
Common Stock, $0.001 par value - Authorized: 800,000,000 and 700,000,000 shares as of December 31, 2017 and December 31, 2016, respectively;77,175,283 and 70,939,647 shares outstanding in aggregate, as of December 31, 2017 and December 31, 2016, respectively	[1]	76	71
Additional paid-in capital		656,705	615,653
Cumulative distributions		(82,590)	(38,406)
Accumulated deficit		(12,672)	(23,788)
Accumulated other comprehensive income		949	841
Total stockholders' equity		562,468	554,371
Noncontrolling interests		76	84
Total equity		562,544	554,455
Total liabilities and equity		$ 1,179,948	$ 1,184,475
[1]	See Note 8, Equity, for the number of shares outstanding of each class of common stock as of December 31, 2017 and December 31, 2016.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, number of shares authorized (in shares)	800,000,000	700,000,000
Common stock, number of shares outstanding (in shares)	77,175,283	70,939,647

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Rental income	$ 89,797	$ 51,403	$ 21,216
Property expense recovery	17,584	11,409	3,933
Total revenue	107,381	62,812	25,149
Asset management fees to affiliates	8,027	6,413	2,624
Property management fees to affiliates	1,799	1,052	333
Advisory fees to affiliates	2,550	0	0
Property operating	6,724	4,428	1,317
Property tax	10,049	7,046	2,713
Acquisition fees and expenses to non-affiliates	0	1,113	3,058
Performance distribution to affiliates	2,394	0	0
Acquisition fees and expenses to affiliates	0	6,176	10,876
General and administrative	3,445	2,804	1,883
Corporate operating expenses to affiliates	2,336	1,622	1,937
Depreciation and amortization	43,950	27,894	12,061
Total expenses	81,274	58,548	36,802
Income (loss) before other income and (expenses)	26,107	4,264	(11,653)
Interest expense	(15,519)	(10,384)	(4,851)
Other income, net	531	13	0
Net income (loss)	11,119	(6,107)	(16,504)
Distributions to redeemable preferred unit holders	0	0	(398)
Preferred units redemption premium	0	0	(375)
Less: Net (income) loss attributable to noncontrolling interests	(3)	3	30
Net income (loss) attributable to common stockholders	$ 11,116	$ (6,104)	$ (17,247)
Net income (loss) attributable to common stockholders per share, basic and diluted (in usd per share)	$ 0.15	$ (0.12)	$ (1.19)
Weighted average number of common shares outstanding, basic and diluted (in shares)	75,799,415	50,712,589	14,479,960

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11,119	$ (6,107)	$ (16,504)
Change in fair value of swap agreement	108	841	0
Total comprehensive income (loss)	11,227	(5,266)	(16,504)
Distributions to redeemable preferred unit holders	0	0	(398)
Preferred units redemption premium	0	0	(375)
Less: comprehensive (income) loss attributable to noncontrolling interests	(3)	3	30
Comprehensive income (loss) attributable to common stockholders	$ 11,224	$ (5,263)	$ (17,247)

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total Stockholders’ Equity	Common Stock	Additional Paid-In Capital	Cumulative Distributions	Accumulated Deficit	Accumulated Other Comprehensive Income	Non- controlling Interests
Beginning balance (shares) at Dec. 31, 2014			1,133,773
Beginning balance at Dec. 31, 2014	$ 9,479	$ 9,340	$ 11	$ 9,838	$ (72)	$ (437)	$ 0	$ 139
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Gross proceeds from issuance of common stock (shares)			26,897,208
Gross proceeds from issuance of common stock	268,973	268,973	$ 16	268,957
Discount on issuance of common stock	(997)	(997)		(997)
Offering costs including dealer manager fees and stockholder servicing fees to affiliates	(27,514)	(27,514)		(27,514)
Distributions to common stockholders	(3,173)	(3,173)			(3,173)
Issuance of shares for distribution reinvestment plan (shares)			477,638
Issuance of shares for distribution reinvestment plan	4,515		$ 2	4,535	(4,537)
Additions to common stock subject to redemption	(4,538)	(4,538)		(4,538)
Issuance of stock dividends (in shares)			47,551
Issuance of stock dividends				476	(476)
Additions to noncontrolling interests subject to redemption	(375)	(375)			(375)
Distributions to noncontrolling interest								(11)
Distributions for noncontrolling interest	364	375			375			(11)
Net income (loss)	(17,277)	(17,247)				(17,247)		(30)
Ending balance (shares) at Dec. 31, 2015			28,556,170
Ending balance at Dec. 31, 2015	224,942	224,844	$ 29	250,757	(8,258)	(17,684)	0	98
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Gross proceeds from issuance of common stock (shares)			40,700,406
Gross proceeds from issuance of common stock	406,463	406,463	$ 40	406,423
Discount on issuance of common stock	(696)	(696)		(696)
Offering costs including dealer manager fees and stockholder servicing fees to affiliates	(43,340)	(43,340)		(43,340)
Distributions to common stockholders	(12,479)	(12,479)			(12,479)
Issuance of shares for distribution reinvestment plan (shares)			1,599,355
Issuance of shares for distribution reinvestment plan	15,158		$ 2	15,157	(15,159)
Repurchase of common stock (shares)			(167,442)
Repurchase of common stock	(1,627)	(1,627)		(1,627)
Additions to common stock subject to redemption	(13,531)	(13,531)		(13,531)
Issuance of stock dividends (in shares)			251,158
Issuance of stock dividends				2,510	(2,510)
Distributions to noncontrolling interest	(11)							(11)
Net income (loss)	(6,107)	(6,104)				(6,104)		(3)
Other comprehensive income	$ 841	841					841
Ending balance (shares) at Dec. 31, 2016	70,939,647		70,939,647
Ending balance at Dec. 31, 2016	$ 554,455	554,371	$ 71	615,653	(38,406)	(23,788)	841	84
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Gross proceeds from issuance of common stock (shares)			4,205,673
Gross proceeds from issuance of common stock	41,826	41,826	$ 4	41,822
Discount on issuance of common stock	(16)	(16)		(16)
Stock-based compensation (shares)			25,500
Stock-based compensation	292	292		292
Offering costs including dealer manager fees and stockholder servicing fees to affiliates	(3,593)	(3,593)		(3,593)
Distributions to common stockholders	(19,427)	(19,427)			(19,427)
Issuance of shares for distribution reinvestment plan (shares)			2,358,188
Issuance of shares for distribution reinvestment plan	22,208		$ 2	22,206	(22,208)
Repurchase of common stock (shares)			(623,499)
Repurchase of common stock	(5,742)	(5,742)	$ (1)	(5,741)
Additions to common stock subject to redemption	(16,467)	(16,467)		(16,467)
Issuance of stock dividends (in shares)			269,774
Issuance of stock dividends				2,549	(2,549)
Distributions to noncontrolling interest	(11)							(11)
Net income (loss)	11,119	11,116				11,116		3
Other comprehensive income	$ 108	108					108
Ending balance (shares) at Dec. 31, 2017	77,175,283		77,175,283
Ending balance at Dec. 31, 2017	$ 562,544	$ 562,468	$ 76	$ 656,705	$ (82,590)	$ (12,672)	$ 949	$ 76

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities:
Net income (loss)	$ 11,119	$ (6,107)	$ (16,504)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation of building and improvements	20,194	11,630	4,916
Amortization of tenant origination and absorption costs	23,756	16,264	7,145
Amortization of above and below market leases	(4,573)	(3,592)	(1,858)
Amortization of deferred financing costs	1,106	1,196	514
Deferred rent	(17,308)	(3,924)	(1,500)
Stock based compensation	292	0	0
Unrealized loss (gain) on interest rate swap	83	(155)	0
Change in operating assets and liabilities:
Other assets, net	4,590	(1,040)	(2,065)
Accrued expenses and other liabilities, net	(2,615)	3,094	6,271
Due to affiliates, net	3,068	(922)	146
Net cash provided by (used in) operating activities	39,712	16,444	(2,935)
Investing Activities:
Acquisition of properties, net	(44,234)	(538,845)	(479,198)
Restricted reserves	(42,430)	(3,541)	0
Improvements to real estate	(21)	(40)	0
Payments for construction in progress	(772)	(80)	0
Real estate acquisition deposits	250	8,700	(6,950)
Net cash used in investing activities	(87,207)	(533,806)	(486,148)
Financing Activities:
Proceeds from borrowings - Credit Facility	24,300	249,900	286,050
Proceeds from borrowings - AIG Loan	0	0	126,970
Principal payoff of indebtedness - Credit Facility	0	(55,000)	(147,492)
Deferred financing costs	(30)	(1,578)	(2,186)
Issuance of common stock, net of offering costs	30,699	383,170	240,596
Issuance of preferred units subject to redemption	0	0	73,260
Redemption of preferred units	0	0	(73,260)
Repurchase of common stock	(5,742)	(1,627)	0
Distributions paid to common stockholders	(19,232)	(11,541)	(2,632)
Distributions paid to noncontrolling interests	(11)	(11)	(11)
Distributions paid to preferred units subject to redemption	0	0	(398)
Preferred offering costs	0	0	(375)
Net cash provided by financing activities	29,984	563,313	500,522
Net (decrease) increase in cash, cash equivalents and restricted cash	(17,511)	45,951	11,439
Cash, cash equivalents and restricted cash at the beginning of the period	63,561	17,610	6,171
Cash, cash equivalents and restricted cash at the end of the period	46,050	63,561	17,610
Supplemental disclosure of cash flow information:
Cash paid for interest	13,116	9,228	2,616
Supplemental disclosures of non-cash investing and financing transactions:
Increase in fair value swap agreement	108	841	0
Increase in Stock Servicing Fee Payable	660	17,449	25
Increase in distributions payable to common stockholders	195	938	541
Common stock issued pursuant to the distribution reinvestment plan	$ 22,208	$ 15,158	$ 4,515

Organization

Organization	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Griffin Capital Essential Asset REIT II, Inc., a Maryland corporation (the “Company”), was formed on November 20, 2013 under the Maryland General Corporation Law and qualified as a real estate investment trust (“REIT”) commencing with the year ended December 31, 2015. The Company was organized primarily with the purpose of acquiring single tenant net lease properties that are considered essential to the occupying tenant, and has used a substantial amount of the net proceeds from its initial public offering ("IPO") to invest in such properties. The Company’s year end is December 31. Griffin Capital Company, LLC, a Delaware limited liability company (the “Sponsor”), is the sponsor of the Company. The Sponsor, which was formerly known as Griffin Capital Corporation, began operations in 1995 to engage principally in acquiring and developing office and industrial properties. Kevin A. Shields, the Company's Chief Executive Officer and Chairman of the Company's board of directors, controls the Sponsor. Griffin Capital Essential Asset Advisor II, LLC, a Delaware limited liability company (the “Advisor”), was formed on November 19, 2013. Griffin Capital Real Estate Company, LLC, a Delaware limited liability company ("GRECO"), is the sole member of the Advisor and Griffin Capital, LLC, a Delaware limited liability company ("GC"), is the sole member of GRECO. The Sponsor is the sole member of GC. The Advisor is responsible for managing the Company’s affairs on a day-to-day basis and identifying and making acquisitions and investments on behalf of the Company under the terms of the Advisory Agreement (as defined below). The Company's officers are also officers of the Advisor and officers of the Sponsor. Griffin Capital Securities, LLC (the “Dealer Manager”) is a Delaware limited liability company and is a wholly-owned subsidiary of GC. The Dealer Manager is responsible for marketing the Company’s shares offered pursuant to the Company's public offerings. The Company’s property manager is Griffin Capital Essential Asset Property Management II, LLC, a Delaware limited liability company (the “Property Manager”), which was formed on November 19, 2013 to manage the Company’s properties, or provide oversight of other property managers engaged by the Company or an affiliate of the Company. The Property Manager derives substantially all of its income from the property management services it performs for the Company. Griffin Capital Essential Asset Operating Partnership II, L.P., a Delaware limited partnership (the “Operating Partnership”), was formed on November 21, 2013. On February 11, 2014, the Advisor purchased a 99% limited partnership interest and special limited partnership interest in the Operating Partnership for $0.2 million and on February 11, 2014, the Company contributed the initial one thousand dollars capital contribution it received to the Operating Partnership in exchange for a 1% general partner interest. The Operating Partnership owns, and will own, directly or indirectly, all of the properties acquired by the Company. The Operating Partnership will conduct certain activities through the Company’s taxable REIT subsidiary, Griffin Capital Essential Asset TRS II, Inc., a Delaware corporation (the “TRS”), formed on November 22, 2013, which is a wholly-owned subsidiary of the Operating Partnership. The TRS had no activity as of December 31, 2017 . In 2014, the Company registered $2.2 billion in common shares in its IPO, consisting of $2.0 billion in common shares to be offered to the public in the primary portion of the IPO and $200.0 million in common shares for sale pursuant to the Company's distribution reinvestment plan (“DRP”). (See Note 8, Equity, for additional details.) In September 2016, the Company's board of directors approved the close of the primary portion of the IPO effective January 20, 2017; however, the Company continued to offer shares pursuant to the DRP under the Company's IPO registration statement through May 2017. On April 6, 2017, the Company filed a Registration Statement on Form S-3 with the Securities and Exchange Commission ("SEC") for the registration of 3.0 million shares for sale pursuant to the DRP. The DRP may be terminated at any time upon 10 days’ prior written notice to stockholders, which may be provided through the Company's filings with the SEC. On September 20, 2017, the Company commenced a follow-on offering of up to $2.2 billion of shares (the "Follow-On Offering"), consisting of up to $2.0 billion of shares in the Company's primary offering and $0.2 billion of shares pursuant to the DRP. The Company reclassified all Class T and Class I shares sold in the IPO as "Class AA" and "Class AAA" shares, respectively. The Company is offering to the public four new classes of shares of common stock: Class T shares, Class S shares, Class D shares and Class I shares (the “New Shares”) with net asset value (“NAV”) based pricing. The share classes have different selling commissions, dealer manager fees and ongoing distribution fees. On September 20, 2017, an affiliated entity purchased 263,992 New Shares for $2.5 million . The Company's charter authorizes up to 1,000,000,000 shares of stock, of which 800,000,000 shares are designated as common stock at $0.001 par value per share and 200,000,000 shares are designated as preferred stock at $0.001 par value per share. The Company's 800,000,000 shares of common stock are authorized as follows: 150,000,000 shares are classified as Class T shares, 150,000,000 shares are classified as Class S shares, 150,000,000 shares are classified as Class D shares, 150,000,000 shares are classified as Class I shares, 70,000,000 shares are classified as Class A shares, 120,000,000 shares are classified as Class AA shares and 10,000,000 shares are classified as Class AAA shares. The Dealer Manager is responsible for marketing the Company’s shares being offered pursuant to the Follow-On Offering. On September 18, 2017, the Company and the Dealer Manager entered into a dealer manager agreement for the Follow-On Offering. The dealer manager agreement may be terminated by either party upon prior written notice. See Note 10, Related Party Transactions , for additional details. The Company, the Operating Partnership and the Advisor were parties to an advisory agreement dated July 31, 2014, as amended by Amendment No. 1 to Advisory Agreement dated March 18, 2015, Amendment No. 2 to Advisory Agreement dated November 2, 2015, Amendment No. 3 to Advisory Agreement dated December 16, 2015, Amendment No. 4 to Advisory Agreement dated February 9, 2016 and Amendment No. 5 to Advisory Agreement dated June 14, 2017 (collectively, the "Original Advisory Agreement"), pursuant to which the Advisor agreed to provide certain services to the Company and the Operating Partnership, and the Company agreed to provide certain compensation to the Advisor in exchange for such services. On September 20, 2017, the Company entered into an amended and restated advisory agreement (the "Advisory Agreement") with the Advisor and the Operating Partnership, which replaced the Original Advisory Agreement and modified various provisions including the fees and expense reimbursements payable to the Advisor. See Note 10, Related Party Transactions , for additional details. On September 20, 2017, the Company, as general partner of the Operating Partnership, entered into a Third Amended and Restated Limited Partnership Agreement of the Operating Partnership (the "Third Amended and Restated Operating Partnership Agreement") on behalf of itself and the limited partners. The Third Amended and Restated Operating Partnership Agreement is substantially similar to the Company's prior limited partnership agreement, except that it has been updated to reflect changes to the distributions and fees to which the Advisor is entitled, include additional classes of Operating Partnership units, and make other conforming changes. See Note 10, Related Party Transactions , for additional details. In connection with the Follow-On Offering, the Company's board of directors adopted an amended and restated DRP effective as of September 30, 2017 to include the New Shares under the DRP. In connection with the Follow-On Offering, the Company’s board of directors adopted a share redemption program for the New Shares (the “New Share Redemption Program”). Under this program, stockholders of the New Shares are allowed to redeem their shares after a one -year holding period at a redemption price equal to the NAV per share for the applicable class generally on the 13th of the month immediately prior to the end of the applicable quarter. The IPO Share Redemption Program (as defined in Note 8, Equity ) remains available for stockholders who purchased shares in the Company’s IPO. See Note 8, Equity , for additional details.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies The accompanying cons olidated financial statements of the Company are prepared by management on the accrual basis of accounting and in accordance with generally accepted accounting principles in the United States (“GAAP”) as contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), and in conjunction with rules and regulations of the SEC. The consolidated financial statements include accounts and related adjustments, which are, in the opinion of management, of a normal recurring nature and necessary for a fair presentation of the Company's financial position, results of operations and cash flows for the years ended December 31, 2017 and 2016 . The consolidated financial statements of the Company include all accounts of the Company, the Operating Partnership, and its subsidiaries. Intercompany transactions are not shown on the consolidated statements. However, each property owning entity is a wholly owned subsidiary which is a special purpose entity ("SPE"), whose assets and credit are not available to satisfy the debts or obligations of any other entity, except to the extent required with respect to any co-borrower or guarantor under the same credit facility. Revenue Recognition Leases associated with the acquisition and contribution of certain real estate assets (see Note 3, Real Estate ) have net minimum rent payment increases during the term of the lease and are recorded to rental revenue on a straight-line basis, commencing as of the contribution or acquisition date. If a lease provides for contingent rental income, the Company will defer the recognition of contingent rental income, such as percentage rents, until the specific target that triggers the contingent rental income is achieved. Tenant reimbursement revenue, which is comprised of additional amounts collected from tenants for the recovery of certain operating expenses, including repair and maintenance, property taxes and insurance, and capital expenditures, to the extent allowed pursuant to the lease (collectively, "Recoverable Expenses"), is recognized as revenue when the additional rent is due. Recoverable Expenses to be reimbursed by a tenant are determined based on the Company's estimate of the property's operating expenses for the year, pro rated based on leased square footage of the property, and are collected in equal installments as additional rent from the tenant, pursuant to the terms of the lease. At least quarterly, the Company reconciles the amount of additional rent paid by the tenant during the quarter to the actual amount of the Recoverable Expenses incurred by the Company for the same period. The difference, if any, is either charged or credited to the tenant pursuant to the provisions of the lease. In certain instances, the lease may restrict the amount the Company can recover from the tenant such as a cap on certain or all property operating expenses. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates. Change in Consolidated Financial Statements Presentation Certain amounts in the Company's prior period consolidated financial statements have been reclassified to conform to the current period presentation. During the year ended December 31, 2017, the Company elected to early adopt Accounting Standards Update ("ASU") No. 2016-18 (as discussed below). As a result, the Company no longer presents transfers between cash and restricted cash in the consolidated statements of cash flows. Instead, restricted cash is included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows. Principles of Consolidation The Company's financial statements, and the financial statements of the Company's Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by the Company is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation. Cash and Cash Equivalents The Company considers all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. Cash and cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value. There were no cash equivalents, nor were there restrictions on the use of the Company’s cash balance as of December 31, 2017 and 2016 . The Company maintains its cash accounts with major financial institutions. The cash balances consist of business checking accounts. These accounts are insured by the Federal Deposit Insurance Corporation up to $250,000 at each institution. The Company has not experienced any losses with respect to cash balances in excess of government provided insurance. Management believes there was no significant concentration of credit risk with respect to these cash balances as of December 31, 2017 . Restricted Cash In conjunction with acquisitions of certain assets, as required by certain lease provisions or certain lenders in conjunction with an acquisition or debt financing, or credits received by the seller of certain assets, the Company assumed or funded reserves for specific property improvements and deferred maintenance, re-leasing costs, and taxes and insurance, which are included on the consolidated balance sheets as restricted cash. As of December 31, 2017 , the Company had approximately $12.9 million in restricted cash, which includes tenant improvement funds. Real Estate Purchase Price Allocation In January 2017, the FASB issued ASU No. 2017-01, Business Combinations, (see “Recently Issued Accounting Pronouncements” below) that clarifies the framework for determining whether an integrated set of assets and activities meets the definition of a business. The revised framework establishes a screen for determining whether an integrated set of assets and activities is a business and narrows the definition of a business, which is expected to result in fewer transactions being accounted for as business combinations. Acquisitions of integrated sets of assets and activities that do not meet the definition of a business are accounted for as asset acquisitions. This update is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted for transactions that have not been reported in previously issued (or available to be issued) financial statements. The Company adopted this accounting standard early effective October 1, 2016. As a result of the Company's adoption of ASU No. 2017-01, Business Combinations, the Company anticipates that many of its future acquisitions will be treated as asset acquisitions, which will result in a lower amount of acquisition-related costs being expensed on the Company's consolidated statement of operations, as the majority of those costs will be capitalized and included as part of the relative fair value allocation of the purchase price. The Company applies the provisions in ASC 805-10, Business Combinations , to account for the acquisition of real estate, or real estate related assets, in which a lease, or other contract, is in place representing an active revenue stream, as an asset acquisition (in rare cases, a business combination). In accordance with the provisions of ASC 805-10 (on an asset acquisition), the Company recognizes an asset acquisition, the assets acquired, the liabilities assumed and any noncontrolling interest in the acquired entity at their relative fair values. The accounting provisions have also established that transaction costs associated with an asset acquisition are capitalized. Acquired in-place leases are valued as above-market or below-market as of the date of acquisition. The valuation is measured based on the present value (using an interest rate, which reflects the risks associated with the leases acquired) of the difference between (a) the contractual amounts to be paid pursuant to the in-place leases and (b) management’s estimate of fair market lease rates for the corresponding in-place leases over a period equal to the remaining non-cancelable term of the lease for above-market leases, taking into consideration below-market extension options for below-market leases. In addition, renewal options are considered and will be included in the valuation of in-place leases if (1) it is likely that the tenant will exercise the option, and (2) the renewal rent is considered to be sufficiently below a fair market rental rate at the time of renewal. The above-market and below-market lease values are capitalized as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases. The aggregate relative fair value of in-place leases includes direct costs associated with obtaining a new tenant, opportunity costs associated with lost rentals, which are avoided by acquiring an in-place lease, and tenant relationships. Direct costs associated with obtaining a new tenant include commissions, tenant improvements, and other direct costs and are estimated using methods similar to those used in independent appraisals and management’s consideration of current market costs to execute a similar lease. These direct costs are considered intangible lease assets and are included with real estate assets on the consolidated balance sheets. The intangible lease assets are amortized to expense over the remaining terms of the respective leases. The value of opportunity costs is calculated using the contractual amounts to be paid, including real estate taxes, insurance, and other operating expenses, pursuant to the in-place leases over a market lease-up period for a similar lease. Customer relationships are valued based on management’s evaluation of certain characteristics of each tenant’s lease and the Company’s overall relationship with that respective tenant. Characteristics management will consider in allocating these values include the nature and extent of the Company’s existing business relationships with tenants, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals (including those existing under the terms of the lease agreement), among other factors. These intangibles will be included in intangible lease assets on the consolidated balance sheets and are amortized to expense over the remaining term of the respective leases. The determination of the relative fair values of the assets and liabilities acquired requires the use of significant assumptions about current market rental rates, rental growth rates, discount rates and other variables. Depreciation and Amortization The purchase price of real estate acquired and the costs related to development, construction, and property improvements are capitalized. Repairs and maintenance costs include all costs that do not extend the useful life of the real estate asset and are expensed as incurred. The Company considers the period of future benefit of an asset to determine the appropriate useful life. The Company anticipates the estimated useful lives of its assets by class to be generally as follows: Buildings 40 years Building Improvements 5-20 years Land Improvements 15-25 years Tenant Improvements Shorter of estimated useful life or remaining contractual lease term Tenant Origination and Absorption Cost Remaining contractual lease term In-place Lease Valuation Remaining contractual lease term with consideration as to below-market extension options for below-market leases If a lease is terminated or amended prior to its scheduled expiration, the Company will accelerate the remaining useful life of the unamortized lease-related costs. Impairment of Real Estate and Related Intangible Assets The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of real estate and related intangible assets may not be recoverable, including credit ratings of all tenants to stay abreast of any material changes in credit quality. The Company monitors tenant credit by (1) reviewing the credit ratings of tenants (or their parent companies or lease guarantors) that are rated by nationally recognized rating agencies; (2) reviewing financial statements and related metrics and information that are publicly available or that are required to be provided pursuant to the lease; (3) monitoring news reports and press releases regarding the tenants (or their parent companies or lease guarantors), and their underlying business and industry; and (4) monitoring the timeliness of rent collections. When indicators of potential impairment are present that indicate that the carrying amounts of real estate and related intangible assets may not be recoverable, management assesses whether the carrying value of the assets will be recovered through the future undiscounted operating cash flows expected from the use of the assets and the eventual disposition. If, based on this analysis, the Company does not believe that it will be able to recover the carrying value of the asset, the Company will record an impairment charge to the extent the carrying value exceeds the net present value of the estimated future cash flows of the asset. Projections of expected future undiscounted cash flows require management to estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, discount rates, the number of months it takes to re-lease the property and the number of years the property is held for investment. For the year ended December 31, 2017 , the Company did not record any impairment charges related to its real estate assets or intangible assets . Derivative Instruments and Hedging Activities ASC Topic 815: Derivatives and Hedgin g ("ASC 815"), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, ASC 815 requires qualitative disclosures regarding the Company’s objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, the Company recorded all derivatives on the consolidated balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, and whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. See Note 5, Interest Rate Contracts. Income Taxes The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Code") for the year ended December 31, 2015. To qualify as a REIT, the Company must meet certain organizational and operational requirements, including a requirement to currently distribute at least 90% of the REIT’s ordinary taxable income to stockholders. As a REIT, the Company generally will not be subject to federal income tax on taxable income that is distributed to stockholders. If the Company fails to qualify as a REIT in any taxable year, after the Company initially qualifies to be taxed as a REIT, the Company will then be subject to federal income taxes on the taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Such an event could materially adversely affect net income and net cash available for distribution to stockholders. However, the Company believes that it is organized and will operate in such a manner as to qualify for treatment as a REIT and intends to operate in the foreseeable future in such a manner that it will remain qualified as a REIT for federal income tax purposes. The Company could engage in certain business activities that could have an adverse effect on its REIT qualification. The Company has elected to isolate these business activities in the books and records of the TRS. In general, the TRS may perform additional services for the Company’s tenants and generally may engage in any real estate or non-real estate related business. The TRS will be subject to corporate federal and state income tax. As of December 31, 2017 , the TRS has not commenced operations. Per Share Data The Company reports earnings per share for the period as (1) basic earnings per share computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period, and (2) diluted earnings per share computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding, including common stock equivalents. As of December 31, 2017 and December 31, 2016 , there were no material common stock equivalents that would have a dilutive effect on earnings (loss) per share for common stockholders. The Company retroactively adjusted the number of common shares outstanding in accordance with ASC 260-10, Earnings per Share. ASC 260-10 requires retroactively adjusting the computations of basic and diluted earnings per share for all periods presented to reflect the change in capital structure, if the number of common shares outstanding increases as a result of a stock dividend or stock split or decreases as a result of a reverse stock split. If changes in common stock resulting from stock dividends, stock splits, or reverse stock splits occur after the close of the period but before the consolidated financial statements are issued or are available to be issued, the per-share computations for those and any prior-period consolidated financial statements presented shall be based on the new number of shares. Segment Information ASC Topic 280, Segment Reporting , establishes standards for reporting financial and descriptive information about a public entity’s reportable segments. The Company internally evaluates all of the properties and interests therein as one reportable segment. Unaudited Data Any references to the number of buildings, square footage, number of leases, occupancy, and any amounts derived from these values in the notes to the consolidated financial statements are unaudited and outside the scope of the Company's independent registered public accounting firm's audit of its consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board. Recently Issued Accounting Pronouncements In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging, that simplifies hedge accounting. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. For cash flow hedges that are highly effective, the new standard requires all changes (effective and ineffective components) in the fair value of the hedging instrument to be recorded in other comprehensive income and to be reclassified into earnings only when the hedged item impacts earnings. Current guidance requires a periodic recognition of hedge ineffectiveness in earnings. Under existing standards a quantitative assessment is made on an ongoing basis to determine if a hedge is highly effective in offsetting changes in cash flows associated with the hedged item. Under the new standard, entities will still be required to perform an initial quantitative test. However, the new standard allows entities to elect to subsequently perform only a qualitative assessment unless facts and circumstances change. The ASU is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. For cash flow hedges in existence at the date of adoption, an entity is required to apply a cumulative-effect adjustment for previously recognized ineffectiveness from retained earnings to accumulated other comprehensive income ("AOCI"), as of the beginning of the fiscal year when an entity adopts the amendments in this ASU. The Company utilizes interest rate hedge agreements to hedge a portion of exposure to variable interest rates primarily associated with borrowings based on London Interbank Offered Rate ("LIBOR"). As a result, all interest rate hedge agreements are designated as cash flow hedges. During the years ended December 31, 2017 and December 31, 2016 , the ineffectiveness related to the Company's interest rate hedge agreement was immaterial. Therefore, the Company does not believe this ASU would have an impact on operating results for the year ended December 31, 2017 . In January 2017, the FASB issued ASU No. 2017-01, Business Combinations, that clarified the definition of a business. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The Company adopted this update on October 1, 2016. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash , that will require companies to include restricted cash and restricted cash equivalents with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU will require a disclosure of a reconciliation between the statement of financial position and the statement of cash flows when the statement of financial position includes more than one line item for cash, cash equivalents, restricted cash, and restricted cash equivalents. Entities with material restricted cash and restricted cash equivalents balances will be required to disclose the nature of the restrictions. This ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to all periods presented. The Company elected to early adopt ASU No. 2016-18 for the reporting period ending December 31, 2017 and applied retrospectively to all periods presented. As a result of the adoption of ASU No. 2016-18, the Company no longer presents the changes within restricted cash in the consolidated statements of cash flows. In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments . ASU No. 2016-15 addresses eight specific cash flow issues with the objective of reducing diversity in practice. The cash flow issues include debt prepayment or debt extinguishment costs and proceeds from the settlement of insurance claims. This ASU is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. The Company elected to early adopt ASU No. 2016-15 for the reporting period ending December 31, 2017. There was no change to the Company's consolidated financial statements or notes as a result of adoption. In February 2016, the FASB issued ASU No. 2016-02, Leases ("ASU No. 2016-02"). ASU No. 2016-02 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU No. 2016-02 will direct how the Company accounts for payments from the elements of leases that are generally fixed and determinable at the inception of the lease (“Fixed Lease Payments”) while ASU No. 2014-09 (defined below) will direct how the Company accounts for the non-lease components of lease contracts, primarily expense reimbursements (“Non-Lease Payments”) and the accounting for the disposition of real estate facilities. ASU No. 2016-02 will be effective beginning in the first quarter of 2019. Early adoption of ASU No. 2016-02 as of its issuance is permitted. ASU No. 2016-02 requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. Based on the required adoption date of January 1, 2019, the modified retrospective method for ASU No. 2016-02 requires application of the standard to all leases that exist at, or commence after, January 1, 2017 (beginning of the earliest comparative period presented in the 2019 financial statements), with a cumulative adjustment to the opening balance of accumulated earnings (deficit) on January 1, 2017, for the effect of applying the standard at the date of initial application, and restatement of the amounts presented prior to January 1, 2019. The FASB has also issued a proposed amendment to the standard that would provide an entity an optional transition method to initially account for the impact of the adoption of the standard with a cumulative adjustment to accumulated earnings (deficit) on January 1, 2019 (the effective date of ASU No. 2016-02), rather than January 1, 2017, which would eliminate the need to restate amounts presented prior to January 1, 2019. Under ASU No. 2016-02, an entity may elect a practical expedient package, which allows for (a) an entity need not to reassess whether any expired or existing contracts are or contain leases; (b) an entity need not reassess the lease classification for any expired or existing leases; and (c) an entity need not reassess initial direct costs for any existing leases. These three practical expedients are available as a single election that must be elected as a package and must be consistently applied to all existing leases at the date of adoption. The FASB has also tentatively noted in board meeting minutes of May 2017 that lessors that adopt this package of practical expedients are not expected to reassess expired or existing leases at the date of initial application, which is January 1, 2017 under ASU No. 2016-02, or January 1, 2019, if the Company elects the optional transition method. The FASB noted that the transition provisions generally enable entities to “run off” their existing leases for the remainder of the lease term, which would effectively eliminate the need to calculate adjustment to the opening balance of accumulated earnings (deficit). In January, 2018, the FASB issued a proposed amendment to ASU No. 2016-02 that would allow lessors to elect, as a practical expedient, not to allocate the total consideration to Fixed Lease Payments and Non-Lease Payments based on their relative standalone selling prices. If adopted, this practical expedient will allow lessors to elect a combined single component presentation if (i) the timing and pattern of the revenue recognition for the Fixed Lease Payments and Non-Lease Payments are the same, and (ii) the combined single component of the lease would continue to be classified as an operating lease. The Company does not expect that ASU 2016-02 will impact the Company's accounting for Fixed Lease Payments, because the Company's accounting policy is currently consistent with the provisions of the standard. The Company is currently evaluating the impact of the standard as it relates to Non-Lease Payments. If the proposed practical expedient mentioned above is adopted and the Company elects it, the Company expects payments for expense reimbursements that qualify as Non-Lease Payments will be presented under a single lease component presentation. However, without the proposed practical expedient, the Company expects these reimbursements would be separated into Fixed Lease Payments and Non-Lease Payments. Under ASU No. 2016-02, reimbursements relating to property taxes and insurances are Fixed Lease Payments as the payments relates to the right to use the leased assets, while reimbursements relating to maintenance activities and common area expense are Non-Lease Payments and would be accounted under ASU No. 2014-09 upon the adoption of the ASU No. 2016-02 as these payments for goods or services are transferred separately from the right to use the underlying assets. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”). ASU No. 2014-09 replaces substantially all industry-specific revenue recognition requirements and converges areas under this topic with International Financial Reporting Standards. ASU No. 2014-09 implements a five-step process for customer contract revenue recognition that focuses on transfer of control, as opposed to transfer of risk and rewards. ASU No. 2014-09 also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenues and cash flows from contracts with customers. Other major provisions in ASU No. 2014-09 include capitalizing and amortizing certain contract costs, ensuring the time value of money is considered in the applicable transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. ASU No. 2014-09 was originally effective for reporting periods beginning after December 31, 2016 (for public entities). On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09 by one year to annual reporting periods beginning after December 15, 2017. On July 9, 2015, the FASB affirmed its proposal to defer the effective date to annual reporting periods beginning after December 15, 2017, although entities may elect to adopt the standard as of the original effective date. The Company intends to adopt the guidance using the modified retrospective approach for the fiscal year beginning January 1, 2018. The Company anticipates minimal impact upon adoption of the new accounting guidance on its consolidated financial statements relating to the recognition of gains and losses on the sale of real estate assets as the Company’s current accounting for such transactions is consistent with the new guidance’s core principle. Rental income from leasing arrangements is a substantial portion of the Company’s revenue, is specifically excluded from ASU No. 2014-09 and will be governed by the applicable lease codification ("ASU No. 2016-02"). In conjunction with the adoption of the leasing guidance, the Company is currently in the process of evaluating certain variable payment terms included in these lease arrangements which are governed by ASU No. 2014-09. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) . The amendments clarify how an entity should identify the unit of accounting (i.e., the specified good or service) for the principal versus agent evaluation, and how it should apply the control principle to certain types of arrangements, such as service transactions, by e

Real Estate

Real Estate	12 Months Ended
	Dec. 31, 2017
Real Estate [Abstract]
Real Estate	Real Estate As of December 31, 2017 , the Company's real estate portfolio consisted of 27 properties ( 35 buildings) in 17 states consisting of office, industrial, distribution, and data center facilities with a combined acquisition value of $1.1 billion including the allocation of the purchase price to above and below-market lease valuation, encompassing approximately 7.3 million square feet. Depreciation expense for buildings and improvements for the year ended December 31, 2017 was $ 20.2 million . Amortization expense for intangibles, including, but not limited to, tenant origination and absorption costs, for the year ended December 31, 2017 was $ 23.8 million . The purchase price and other acquisition items for the properties acquired during the year ended December 31, 2017 are shown below: Paid to Advisor Property Location Tenant/Major Lessee Acquisition Date Purchase Price Approx. Square Feet Acquisition Fees and Reimbursable Expenses (1) Contingent Advisor Payment (2) Year of Lease Expiration Allstate Lone Tree, CO Allstate Insurance Company 1/31/2017 $ 14,750 (3) 70,300 $ 402 $ 273 2026 MISO Carmel, IN Midcontinent Independent System Operator, Inc. 5/15/2017 $ 28,600 133,400 $ 696 $ 529 2028 (1) Under the Original Advisory Agreement, the fee consisted of a 2.0% base acquisition fee and acquisition expense reimbursement for actual acquisition expenses incurred, estimated to be approximately 1.0% of acquisition value. (2) Under the Original Advisory Agreement, the Advisor was entitled to receive an acquisition fee in an amount up to 3.85% of the contract purchase price for each property the Company acquired. The acquisition fee consisted of a 2.0% base acquisition fee and up to an additional 1.85% contingent advisor payment (the "Contingent Advisor Payment"); provided, however, that $5.0 million of amounts advanced by the Advisor for dealer manager fees and organizational and offering expenses (the "Contingent Advisor Payment Holdback") would be retained by the Company until the later of (a) the termination of the IPO, including any follow-on offerings where the Advisor provides up-front funding of offering fees, or (b) July 31, 2017, at which time such amount would be paid to the Advisor. On July 31, 2017, the Company paid to the Advisor the Contingent Advisor Payment Holdback of $5.0 million , which consisted of amounts previously advanced by the Advisor for dealer manager fees and organizational and offering expenses. (3) The purchase price for the Allstate property was $14.8 million , plus closing costs, less a credit in the amount of $0.4 million applied at closing. Real Estate - Valuation and Purchase Price Allocation The Company allocates the purchase price to the fair value of the tangible assets of a property by valuing the property as if it were vacant. This “as-if vacant” value is estimated using an income, or discounted cash flow, approach that relies upon Level 3 inputs, which are unobservable inputs based on the Company's review of the assumptions a market participant would use. These Level 3 inputs include discount rates, capitalization rates, market rents and comparable sales data for similar properties. Estimates of future cash flows are based on a number of factors including historical operating results, known and anticipated trends, and market and economic conditions. In calculating the “as-if vacant” value for acquisitions completed during the year ended December 31, 2017 , the Company used discount rates ranging from 5.75% to 8.25% . In determining the fair value of intangible lease assets or liabilities, the Company also considers Level 3 inputs. Acquired above and below-market leases are valued based on the present value of the difference between prevailing market rates and the in-place rates measured over a period equal to the remaining term of the lease for above-market leases and the initial term plus the term of any below-market fixed rate renewal options for below-market leases, if applicable. The estimated fair value of acquired in-place at-market tenant leases are the costs that would have been incurred to lease the property to the occupancy level of the property at the date of acquisition. Such estimates include the value associated with leasing commissions, legal and other costs, as well as the estimated period necessary to lease such property that would be incurred to lease the property to its occupancy level at the time of its acquisition. Acquisition costs associated with asset acquisitions are capitalized in the period they are incurred. The following summarizes the purchase price allocations for the properties acquired during the year ended December 31, 2017 : Property (1) Land Building and Improvements Tenant Origination and Absorption Cost In-Place Lease Valuation Above Market In-Place Lease Valuation (Below) Market Total Allstate $ 1,808 $ 9,071 $ 5,019 $ — $ (1,001 ) $ 14,897 MISO $ 3,104 $ 18,077 $ 7,937 $ 218 $ — $ 29,336 (1) The Company evaluated the transactions above under the clarified framework for determining whether an integrated set of assets and activities meets the definition of a business, pursuant to ASU No. 2017-01, Business Combinations, issued in January 2017, which the Company early-adopted effective October 1, 2016. Acquisitions that do not meet the definition of a business are accounted for as asset acquisitions. Since the transactions above lacked a substantive process, the transactions did not meet the definition of a business and consequently were accounted for as asset acquisitions. The Company allocated the total consideration (including acquisition costs of approximately $1.2 million ) to the individual assets and liabilities acquired on a relative fair value basis. Future Minimum Contractual Rent Payments The future minimum contractual rent payments pursuant to the current lease terms are shown in the table below. The Company's current leases have expirations ranging from 2020 to 2044. As of December 31, 2017 2018 $ 71,662 2019 78,887 2020 80,492 2021 72,677 2022 73,538 Thereafter 528,803 Total $ 906,059 Intangibles The Company allocated a portion of the acquired real estate asset value to in-place lease valuation and tenant origination and absorption cost. The in-place lease was measured against comparable leasing information and the present value of the difference between the contractual, in-place rent and the fair market rent was calculated using, as the discount rate, the capitalization rate utilized to compute the value of the real estate at acquisition. The intangible assets are amortized over the remaining lease terms of the respective properties, which on a weighted-average basis, was approximately 10.3 and 11.4 years as of December 31, 2017 and December 31, 2016 , respectively. December 31, 2017 December 31, 2016 In-place lease valuation (above market) $ 4,046 $ 3,828 In-place lease valuation (above market), accumulated amortization (752 ) (300 ) Intangible assets, net $ 3,294 $ 3,528 In-place lease valuation (below market) $ (62,070 ) $ (61,069 ) In-place lease valuation (below market) - accumulated amortization 10,775 5,750 In-place lease valuation (below market), net $ (51,295 ) $ (55,319 ) Tenant origination and absorption cost $ 240,364 $ 227,407 Tenant origination and absorption cost - accumulated amortization (47,165 ) (23,409 ) Tenant origination and absorption cost, net $ 193,199 $ 203,998 The amortization of the intangible assets and other leasing costs for the respective periods is as follows: Amortization (income) expense for the year ended December 31, 2017 2016 2015 In-place lease valuation $ (4,573 ) $ (3,592 ) $ (1,858 ) Tenant origination and absorption cost $ 23,756 $ 16,264 $ 7,145 The following table sets forth the estimated annual amortization (income) expense for in-place lease valuation, and tenant origination and absorption costs as of December 31, 2017 for the next five years: Year In-Place Lease Valuation Tenant Origination and Absorption Costs 2018 $ (4,695 ) $ 24,198 2019 $ (4,695 ) $ 24,198 2020 $ (4,695 ) $ 24,198 2021 $ (3,799 ) $ 19,715 2022 $ (3,799 ) $ 19,597

Debt

Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Debt	Debt As of December 31, 2017 and 2016 , the Company's debt and related deferred financing costs consisted of the following: December 31, 2017 December 31, 2016 Contractual Interest Rate (1) Payment Type Loan Maturity Effective Interest Rate (4) Revolving Credit Facility $ 357,758 $ 333,458 2.87% Interest Only December 2019 (2) 3.32% AIG Loan 126,970 126,970 4.15% Interest Only (3) November 2025 4.22% Total Debt 484,728 460,428 Unamortized deferred financing costs (2,880 ) (3,956 ) Total Debt, net $ 481,848 $ 456,472 (1) The 2.87% contractual interest rate is based on a 360 -day year, pursuant to the Revolving Credit Facility. The 2.92% weighted-average interest rate is based on a 365 -day year. As discussed below, the interest rate on the Revolving Credit Facility (as defined below) is a one-month LIBO Rate + 1.50% . As of December 31, 2017 , the LIBO Rate was 1.57% . Including the effect of interest rate swap agreements with a total notional amount of $200.0 million , the weighted average interest rate as of December 31, 2017 was approximately 3.13% for the Company's fixed-rate and variable-rate debt combined. (2) The Revolving Credit Facility has an initial term of four years, maturing on December 12, 2018, and may be extended for a one -year period if certain conditions are met and upon payment of an extension fee. See discussion below. (3) The AIG Loan (as defined below) requires monthly payments of interest only, at a fixed rate, for the first five years and fixed monthly payments of principal and interest thereafter. (4) Reflects the effective interest rate at December 31, 2017 and includes the effect of amortization of deferred financing costs. Revolving Credit Facility On December 12, 2014, the Company, through the Operating Partnership, entered into a revolving credit agreement, as amended by the first amendment to the revolving credit agreement dated as of May 27, 2015, and as further amended by the increase agreements to the revolving credit agreement dated as of August 11, 2015 and November 22, 2016, and various notes related thereto, related to a loan with a syndicate of lenders, under which KeyBank, National Association ("KeyBank") serves as administrative agent; Bank of America, N.A., SunTrust Bank, Capital One, National Association ("Capital One"), and Wells Fargo Bank, National Association, serve as co-syndication agents; and KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner and Smith Incorporated, SunTrust Robinson Humphrey, Inc., Capital One, and Wells Fargo Securities, LLC serve as joint lead arrangers and joint bookrunners. In addition, the Company entered into guaranty agreements. Pursuant to the credit agreement, the Company was provided with a revolving credit facility (as amended, the "Revolving Credit Facility") in an initial commitment amount of $250.0 million , which commitment may be increased under certain circumstances up to a maximum total commitment of $1.25 billion . On August 11, 2015, the Company exercised its right under the credit agreement to increase the total commitments from $250.0 million to $410.0 million , and on November 22, 2016, the Company exercised its right under the credit agreement to increase the total commitments from $410.0 million to $550.0 million . The Revolving Credit Facility has an initial term of four years , maturing on December 12, 2018. The Revolving Credit Facility may be extended for a one -year period if certain conditions are met and the Company pays an extension fee. Payments under the Revolving Credit Facility are interest only and are due on the first day of each quarter. The Revolving Credit Facility has an interest rate calculated based on LIBOR plus the applicable LIBOR margin, as provided in the credit agreement, or the Base Rate plus the applicable base rate margin, as provided in the credit agreement. The applicable LIBOR margin and base rate margin are dependent on the consolidated leverage ratio of the Company's Operating Partnership, the Company, and the Company's subsidiaries, as disclosed in the periodic compliance certificate provided to the administrative agent each quarter. The Revolving Credit Facility was initially secured by a pledge of 100% of the ownership interests in each SPE which owns a pool property. On November 1, 2016, all pledged membership interests were released from the lien of the pledge agreements and subsequently terminated. Adjustments to the applicable LIBOR margin and base rate margin upon the release of the security for the Revolving Credit Facility were effective as of January 1, 2017. The Revolving Credit Facility may be prepaid and terminated, in whole or in part, at any time without fees or penalty. As of December 31, 2017 , the Company was in compliance with all applicable covenants. As of December 31, 2017 , the remaining capacity pursuant to the Revolving Credit Facility was $143.1 million . AIG Loan On October 22, 2015, six SPEs that are wholly-owned by the Operating Partnership entered into promissory notes with The Variable Annuity Life Insurance Company, American General Life Insurance Company, and the United States Life Insurance Company (collectively, the "Lenders"), pursuant to which the Lenders provided such SPEs with a loan in the aggregate amount of approximately $127.0 million (the "AIG Loan"). The AIG Loan has a term of 10 years , maturing on November 1, 2025. The AIG Loan bears interest at a rate of 4.15% . The AIG Loan requires monthly payments of interest only for the first five years and fixed monthly payments of principal and interest thereafter. The AIG Loan is secured by cross-collateralized and cross-defaulted first lien deeds of trust and second lien deeds of trust on certain properties. Commencing October 31, 2017, each of the individual promissory notes comprising the AIG Loan may be prepaid but only if such prepayment is made in full, subject to 30 days' prior notice to the holder and payment of a prepayment premium in addition to all unpaid principal and accrued interest to the date of such prepayment. As of December 31, 2017 , there was approximately $127.0 million outstanding pursuant to the AIG Loan. Debt Covenant Compliance Pursuant to the terms of the Revolving Credit Facility and AIG Loan, the Company is subject to certain loan compliance covenants. The Company was in compliance with all applicable covenants as of December 31, 2017 . The following summarizes the future principal repayments of all loans as of December 31, 2017 per the loan terms discussed above: December 31, 2017 2018 $ — 2019 357,758 2020 — 2021 2,178 2022 2,271 Thereafter 122,521 Total principal 484,728 Unamortized deferred loan costs (2,880 ) Total $ 481,848

Interest Rate Contracts

Interest Rate Contracts	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Contracts	Interest Rate Contracts Risk Management Objective of Using Derivatives The Company is exposed to certain risks arising from both business operations and economic conditions. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of debt funding and the use of derivative financial instruments. Specifically, the Company entered into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by expected cash payments principally related to borrowings and interest rates. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The Company does not use derivatives for trading or speculative purposes. Derivative Instruments On February 25, 2016, the Company entered into an interest rate swap agreement to hedge the variable cash flows associated with the LIBO Rate-based variable-rate debt on the Company's Revolving Credit Facility. The interest rate swap is effective for the period from April 1, 2016 to December 12, 2018 with a notional amount of $100.0 million . Effective as of November 1, 2017, Griffin Capital Essential Asset Operating Partnership, L.P, an affiliated party of the Company, novated one of its $100 million swaps to the Operating Partnership, as a result of the repayment of debt. The terms of the cash flow swap are listed in the table below. The effective portion of the change in the fair value of derivatives designated and qualifying as cash flow hedges is initially recorded in AOCI and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to derivatives will be reclassified to interest expense as interest payments are made on the Company's variable-rate debt. The following table sets forth a summary of the interest rate swaps at December 31, 2017 and December 31, 2016 : Fair Value (1) Current Effective Notional Amount (2) Derivative Instrument Effective Date Maturity Date Interest Strike Rate December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 Assets Interest Rate Swap 4/1/2016 12/12/2018 0.74% $ 967 $ 996 $ 100,000 $ 100,000 Interest Rate Swap (3) 11/1/2017 7/1/2018 1.50% 65 — 100,000 — Total $ 1,032 $ 996 $ 200,000 $ 100,000 (1) The Company records all derivative instruments on a gross basis on the consolidated balance sheets, and accordingly, there are no offsetting amounts that net assets against liabilities. As of December 31, 2017 , the Company's derivatives were in asset positions, and as such, the fair value is included in the line item "Other Assets, net" on the consolidated balance sheet. (2) Represents the notional amount of swap that was effective as of the balance sheet date of December 31, 2017 and December 31, 2016 . (3) Effective as of November 1, 2017, Griffin Capital Essential Asset Operating Partnership, L.P, an affiliated party novated a $100 million interest rate swap agreement with an expiration date of June 1, 2018 to the Company's Operating Partnership. The Company paid approximately nine thousand dollars, which approximated fair value. The following table sets forth the impact of the interest rate swaps on the consolidated financial statements for the periods presented: Year Ended December 31, 2017 2016 Interest Rate Swaps in Cash Flow Hedging Relationship: Amount of loss recognized in AOCI on derivative (effective portion) $ 428 $ 662 Amount of (gain) loss reclassified from AOCI into earnings under “Interest expense” (effective portion) $ (319 ) $ 179 Amount of (loss) gain recognized in earnings under “Interest expense” (ineffective portion and amount excluded from effectiveness testing) $ (80 ) $ 155 During the twelve months subsequent to December 31, 2017 , the Company estimates that an additional $1.0 million will be recognized from AOCI into earnings. The Company's agreement with the derivative counterparty contains a provision where if the Company defaults on any of the Company's indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender within a specified time period, then the Company could also be declared in default on its derivative obligation. As of December 31, 2017 , the fair value of interest rate swaps were in asset positions excluding any adjustment for nonperformance risk related to the Company's derivative counterparty agreement, which was approximately $1.0 million . As of December 31, 2017 , the Company had not posted any collateral related to the Company's derivative counterparty agreement.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company is required to disclose fair value information about all financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practicable to estimate fair value. The Company measures and discloses the estimated fair value of financial assets and liabilities utilizing a fair value hierarchy that distinguishes between data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consists of three broad levels, as follows: (i) quoted prices in active markets for identical assets or liabilities, (ii) "significant other observable inputs," and (iii) "significant unobservable inputs." "Significant other observable inputs" can include quoted prices for similar assets or liabilities in active markets, as well as inputs that are observable for the asset or liability, such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. "Significant unobservable inputs" are typically based on an entity’s own assumptions, since there is little, if any, related market activity. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. There were no transfers between the levels in the fair value hierarchy during the year ended December 31, 2017 . The following tables set forth the assets/(liabilities) that the Company measures at fair value on a recurring basis by level within the fair value hierarchy as of December 31, 2017 and 2016 : Total Fair Value Quoted Prices in Active Markets for Identical Assets and Liabilities Significant Other Observable Inputs Significant Unobservable Inputs Interest Rate Swaps at: December 31, 2017 $ 1,032 $ — $ 1,032 $ — December 31, 2016 $ 996 $ — $ 996 $ — Financial instruments as of December 31, 2017 consisted of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, other accrued expenses, and borrowings. With the exception of the mortgage loan in the table below, the amounts of the financial instruments presented in the consolidated financial statements substantially approximate their fair value as of December 31, 2017 . The fair value of the mortgage loan is estimated by discounting the loan’s principal balance over the remaining term of the mortgage using current borrowing rates available to the Company for debt instruments with similar terms and maturities. The Company determined that the mortgage loan valuation in its entirety is classified in Level 2 of the fair value hierarchy, as the fair value is based on current pricing for debt with similar terms as the in-place debt, and there were no transfers into and out of fair value measurement levels during the years ended December 31, 2017 and 2016 . December 31, 2017 December 31, 2016 Fair Value Carrying Value (1) Fair Value Carrying Value (1) AIG Loan $ 122,928 $ 126,970 $ 120,322 $ 126,970 (1) The carrying value of the AIG Loan does not include deferred financing costs as of December 31, 2017 and 2016 . See Note 4, Debt , for details.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued Expenses and Other Liabilities	Accrued Expenses and Other Liabilities Accrued expenses and other liabilities consisted of the following as of December 31, 2017 and 2016 : December 31, 2017 December 31, 2016 Prepaid rent $ 4,304 $ 9,484 Leasing commission payable 3,783 3,783 Accrued property taxes 3,490 2,678 Interest expense payable 3,013 1,716 Other liabilities 5,313 3,866 Total $ 19,903 $ 21,527

Equity

Equity	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Equity	Equity Status of Offerings On January 20, 2017, the Company closed the primary portion of the IPO; however, the Company continued to offer shares pursuant to the DRP. On April 6, 2017, the Company filed a Registration Statement on Form S-3 with the SEC for the registration of 3.0 million shares for sale pursuant to the DRP. The DRP may be terminated at any time upon 10 days’ prior written notice to stockholders, which may be provided through the Company's filings with the SEC. On September 20, 2017, the Company commenced a Follow-On Offering of up to $2.2 billion of shares, consisting of up to $2.0 billion of shares in the Company's primary offering and $0.2 billion of shares pursuant to the DRP. The Company reclassified all Class T and Class I shares sold in the IPO as "Class AA" and "Class AAA" shares, respectively. The Company is offering Class T shares, Class S shares, Class D shares and Class I shares in its Follow-On Offering. Share Classes Class T shares, Class S shares, Class D shares, Class I shares, Class A shares, Class AA shares and Class AAA shares vote together as a single class, and each share is entitled to one vote on each matter submitted to a vote at a meeting of the Company's stockholders; provided that with respect to any matter that would only have a material adverse effect on the rights of a particular class of common stock, only the holders of such affected class are entitled to vote . The following table summarizes shares issued and gross proceeds received for each share class as of December 31, 2017 and outstanding shares as of December 31, 2017 and 2016 : Class T S D I A AA AAA Total Gross proceeds from primary portion of offerings $ 41 $ 3 $ 3 $ 2,493 $ 240,780 $ 474,858 $ 8,379 $ 726,557 Gross proceeds from DRP $ — $ — $ — $ 41 $ 19,773 $ 21,828 $ 312 $ 41,954 Shares issued in primary portion of offerings 4,144 264 264 263,200 24,199,760 47,562,870 901,225 72,931,727 DRP shares issued 4 4 4 4,276 2,089,748 2,313,170 33,308 4,440,514 Stock distribution shares issued — — — — 263,641 300,166 4,676 568,483 Restricted stock units issued — — — — — — 25,500 25,500 Total redemptions — — — — (557,206 ) (233,735 ) — (790,941 ) Total shares outstanding as of 12/31/2017 4,148 268 268 267,476 25,995,943 49,942,471 964,709 77,175,283 Total shares outstanding as of 12/31/2016 — — — — 25,562,982 44,595,631 781,034 70,939,647 Offering and Organizational Costs Pursuant to the Advisory Agreement, in no event will the Company be obligated to reimburse the Advisor for organizational and offering costs incurred in connection with the Follow-On Offering totaling in excess of 15% (including selling commissions, dealer manager fees, distribution fees and non-accountable due diligence expense allowance but excluding acquisition expenses or any fees, if ever applicable) of the gross proceeds raised in the Follow-On Offering (excluding gross proceeds from the DRP). If the organizational and offering costs exceed such limits discussed above, within 60 days after the end of the month in which the Follow-On Offering terminates or is completed, the Advisor is obligated to reimburse the Company for any excess amounts. As long as the Company is subject to the Statement of Policy Regarding Real Estate Investment Trusts published by the North American Securities Administrators Association (“NASAA REIT Guidelines”), such limitation discussed above will also apply to any future public offerings. As of December 31, 2017 , organizational and offering costs relating to the Follow-On Offering were 81.0% of gross offering proceeds, including selling commissions, dealer manager fees and distribution fees. Therefore, if the Follow-On Offering was terminated on December 31, 2017 , the Advisor would be liable for organizational and offering costs incurred by the Company of approximately $1.7 million . Approximately $1.0 million of organizational and offering costs the Advisor is liable for as of December 31, 2017 is deducted from "Due to Affiliates" and the remaining $0.7 million is included in "Other Assets, net" on the consolidated balance sheet. Organizational and offering costs incurred as of December 31, 2017 , including those incurred by the Company and due to the Advisor, for the Follow-On Offering are as follows: December 31, 2017 Cumulative offering costs $ 1,698 Cumulative organizational costs $ 359 Organizational and offering costs advanced by the Advisor $ 1,226 Organizational and offering costs paid by the Company 831 Adjustment to organizational and offering costs pursuant to the limitation: Reduction in due to affiliates (999 ) Due from affiliates (677 ) Net due to Advisor $ 381 As of December 31, 2017 , organizational and offering costs incurred by the Company related to the IPO were approximately $76.0 million . In addition, the total outstanding amounts of the Contingent Advisor Payment Holdback as of December 31, 2017 and 2016 were $0.1 million and $5.4 million , respectively. Amendment and Restatement of Distribution Reinvestment Plan In connection with the Follow-On Offering, on September 8, 2017, the Company's board of directors amended and restated the DRP effective as of September 30, 2017, to include the New Shares under the DRP. The amended and restated DRP allows stockholders to have distributions otherwise distributable to them invested in additional shares of common stock of the same class. No selling commissions, dealer manager fees or stockholder servicing fees are paid on shares sold through the DRP, but the DRP shares will be charged the applicable distribution fee payable with respect to all shares of the applicable class. The purchase price per share under the DRP is equal to the NAV per share applicable to the class of shares purchased, calculated as of the distribution date. IPO Shares - Share Redemption Program The Company has a share redemption program for holders of Class A, Class AA, and Class AAA shares ("IPO Shares") who have held their shares for less than four years, which enables IPO stockholders to sell their shares back to the Company in limited circumstances ("IPO Share Redemption Program"). The Company's IPO Share Redemption Program permits stockholders to submit their IPO Shares for redemption after they have held them for at least one year, subject to the significant conditions and limitations described below. There are several restrictions under the IPO Share Redemption Program. A stockholder generally has to hold his or her shares for one year before submitting shares for redemption under the program; however, the Company may waive the one-year holding period in the event of the death, qualifying disability or bankruptcy of a stockholder. In addition, the Company will limit the number of IPO Shares redeemed pursuant to the IPO Share Redemption Program as follows: (1) during any calendar year, the Company will not redeem in excess of 5% of the weighted average number of IPO Shares outstanding during the prior calendar year; and (2) funding for the redemption of shares will be limited to the amount of net proceeds the Company receives from the sale of IPO Shares under the Company's DRP. These limits may prevent the Company from accommodating all requests made in any year. In addition, stockholders holding IPO Shares for four years or longer will be eligible to utilize the New Share Redemption Program, and redeem at 100% of the NAV of the applicable share class. The IPO Share Redemption Program will terminate in January 2021 on the four year anniversary of the termination of the primary portion of the Company's IPO. During the years ended ended December 31, 2017 and 2016 , the Company redeemed shares of its outstanding common stock as follows: Year Ended December 31, Period 2017 2016 Shares of common stock redeemed 623,499 167,442 Weighted average price per share $ 9.21 $ 9.72 During the year ended December 31, 2016, the Company redeemed 167,442 shares of common stock for approximately $1.6 million at a weighted average price per share of $9.72 . During the year ended December 31, 2017, the Company redeemed 623,499 shares of common stock for approximately $5.7 million at a weighted average price per share of $9.21 . Since inception, the Company has honored all redemption requests and has redeemed a total of 790,941 shares of common stock for approximately $7.4 million at a weighted average price per share of $9.32 . The Company has funded all redemptions using proceeds from the sale of IPO Shares pursuant to the DRP. As long as the common stock is not listed on a national securities exchange or over-the-counter market, stockholders who have held their stock for at least one year may be able to have all or a portion consisting of at least 25% of their shares of stock redeemed by the Company. Share redemption requests must be received by the Company no later than the last business day of the calendar quarter, and shares generally will be redeemed on the last business day of the month following such calendar quarter. The redemption price per IPO Share is expected to be the redemption rate set forth in the following table which is based upon the number of years the stock is held: Number Years Held Redemption Price per Share Less than 1 year No Redemption Allowed After one year from the purchase date 90.0% of the Redemption Amount (as defined below) After two years from the purchase date 95.0% of the Redemption Amount After three years from the purchase date 97.5% of the Redemption Amount After four years from the purchase date 100.0% of the Redemption Amount The Redemption Amount for shares purchased under the Company's IPO Share Redemption Program shall be the lesser of (i) the amount the stockholder paid for their shares or (ii) the NAV of the shares. Shares redeemed in connection with the death or qualifying disability of a stockholder may be repurchased at the purchase price of such shares. The redemption price per share will be reduced by the aggregate amount of net proceeds per share, if any, distributed to the stockholders prior to the repurchase date as a result of a “special distribution.” While the board of directors does not have specific criteria for determining a special distribution, the Company expects that a special distribution will only occur upon the sale of a property and the subsequent distribution of the net sale proceeds. The redemption price per share is subject to adjustment as determined from time to time by the board of directors. The Company’s board of directors may choose to amend, suspend, or terminate the IPO Share Redemption Program upon 30 days' written notice at any time, which may be provided through the Company’s filings with the SEC. If the Company cannot purchase all shares presented for redemption in any quarter, based upon insufficient cash available or the limit on the number of shares the Company may redeem during any calendar year, the Company will attempt to honor redemption requests on a pro rata basis. With respect to any pro rata treatment, redemption requests following the death or qualifying disability of a stockholder will be considered first, as a group, followed by requests where pro rata redemption would result in a stockholder owning less than the minimum balance of $2,500 of shares of common stock, which will be redeemed in full to the extent there are available funds, with any remaining available funds allocated pro rata among all other redemption requests. The Company will treat the unsatisfied portion of the redemption request as a request for redemption the following quarter. Such pending requests will generally be honored on a pro rata basis. Any stockholder request to cancel an outstanding redemption must be sent to the Company's transfer agent prior to the last day of the new quarter. The Company will determine whether sufficient funds are available or the IPO Share Redemption Program has reached the 5% share limit as soon as practicable after the end of each quarter, but in any event prior to the applicable payment date. As the use of the proceeds from the DRP related to the IPO shares for redemptions is outside the Company’s control, the net proceeds from the DRP related to the IPO Shares are considered to be temporary equity and are presented as common stock subject to redemption on the accompanying consolidated balance sheets. The cumulative proceeds from the DRP related to the IPO Shares, net of any redemptions, will be computed at each reporting date and will be classified as temporary equity on the Company’s consolidated balance sheets. As noted above, the redemption is limited to proceeds from new permanent equity from the sale of shares pursuant to the Company’s DRP related to the IPO Shares. As of December 31, 2017 , $ 32.4 million of common stock was available for redemption and $2.2 million of common stock was reclassified from redeemable common stock to accrued expenses and other liabilities in the consolidated balance sheet as of December 31, 2017 . New Share Redemption Program In connection with the Follow-On Offering, the Company’s board of directors adopted the New Share Redemption Program for the New Shares (and IPO Shares that have been held for four years or longer). Under the New Share Redemption Program, the Company will redeem shares as of the last business day of each quarter. The redemption price will be equal to the NAV per share for the applicable class generally on the 13th of the month immediately prior to the end of the applicable quarter. Redemption requests exceeding the quarterly cap will be filled on a pro rata basis. With respect to any pro rata treatment, redemption requests following the death or qualifying disability of a stockholder will be considered first, as a group, followed by requests where pro rata redemption would result in a stockholder owning less than the minimum balance of $2,500 of shares of the Company's common stock, which will be redeemed in full to the extent there are available funds, with any remaining available funds allocated pro rata among all other redemption requests. All unsatisfied redemption requests must be resubmitted after the start of the next quarter, or upon the recommencement of the New Share Redemption Program, as applicable. There are several restrictions under the New Share Redemption Program. Stockholders generally have to hold their shares for one year before submitting their shares for redemption under the program; however, the Company will waive the one -year holding period in the event of the death or qualifying disability of a stockholder. Shares issued pursuant to the DRP are not subject to the one -year holding period. In addition, the New Share Redemption Program generally imposes a quarterly cap on aggregate redemptions of the New Shares (and IPO shares that have been held for four years or longer) equal to a value of up to 5% of the aggregate NAV of the outstanding shares of such classes as of the last business day of the previous quarter. As the value on the aggregate redemptions of the New Shares is outside the Company's control, the 5% quarterly cap is considered to be temporary equity and is presented as the common stock subject to redemption on the accompanying consolidated balance sheets. For the quarter ended December 31, 2017 , the quarterly cap was zero . The Company’s board of directors has the right to modify or suspend the New Share Redemption Program upon 30 days' notice at any time if it deems such action to be in the Company’s best interest and the best interest of the Company’s stockholders. Any such modification or suspension will be communicated to stockholders through the Company’s filings with the SEC. Share-Based Compensation The Company’s board of directors adopted an Employee and Director Long-Term Incentive Plan (the “Plan”), which provides for the grant of awards to the Company's directors and full-time employees (should the Company ever have employees), directors and full-time employees of the Advisor and affiliate entities that provide services to the Company, and certain consultants that provide services to the Company, the Advisor, or affiliate entities. Awards granted under the Plan may consist of stock options, restricted stock, stock appreciation rights, distribution equivalent rights and other equity-based awards. The stock-based payment will be measured at fair value and recognized as compensation expense over the vesting period. The term of the Plan is ten years and the total number of shares of common stock reserved for issuance under the Plan will be equal to 10% of the outstanding shares of stock at any time, not to exceed 10,000,000 shares in the aggregate. As of December 31, 2017 , approximately 7,717,528 shares were available for future issuance under the Plan. During the first quarter of 2017, the Company issued an aggregate of 15,000 shares of restricted stock to the Company's independent directors. These restricted shares were fully vested upon issuance. On June 14, 2017, the Company issued 7,000 shares of restricted stock to each of the Company's independent directors upon each of their respective re-elections to the Company’s board of directors. Half of the restricted shares vested upon issuance, and the remaining half will vest upon the first anniversary of the grant date, subject to the independent director’s continued service as a director during such vesting period. The Company measured and began recognizing director compensation expense for the 36,000 shares of restricted stock granted during 2017, subject to the vesting period. Distributions Earnings and profits, which determine the taxability of distributions to stockholders, may differ from income reported for financial reporting purposes due to the differences for federal income tax purposes in the treatment of loss on debt, revenue recognition and compensation expense and in the basis of depreciable assets and estimated useful lives used to compute depreciation expense. The following unaudited table summarizes the federal income tax treatment for all distributions per share for the years ended December 31, 2017 , 2016 and 2015 reported for federal tax purposes and serves as a designation of capital gain distributions, if applicable, pursuant to Section 857(b)(3)(c) of the Code and Treasury Regulation § 1.857-6(e). Year Ended December 31, 2017 2016 2015 Ordinary income $ 0.04 7.90 % $ 0.31 57.10 % $ 0.21 38.60 % Return of capital 0.51 92.10 % 0.24 42.90 % 0.34 61.40 % Total distributions paid $ 0.55 100.00 % $ 0.55 100.00 % $ 0.55 100.00 %

Noncontrolling Interests

Noncontrolling Interests	12 Months Ended
	Dec. 31, 2017
Noncontrolling Interest [Abstract]
Noncontrolling Interest	Noncontrolling Interests Noncontrolling interests represent limited partnership interests in the Operating Partnership. The Operating Partnership issued 20,000 limited partnership units for $10.00 per unit on February 11, 2014 to the Advisor in exchange for the initial capitalization of the Operating Partnership. As of December 31, 2017 , noncontrolling interests were approximately 0.03% of total shares outstanding and of weighted average shares outstanding (both measures assuming limited partnership units were converted to common stock). The Company evaluates individual noncontrolling interests for the ability to recognize the noncontrolling interest as permanent equity on the consolidated balance sheets at the time such interests are issued and on a continual basis. Any noncontrolling interest that fails to qualify as permanent equity will be reclassified as temporary equity and adjusted to the greater of (a) the carrying amount or (b) its redemption value as of the end of the period in which the determination is made. The limited partners of the Operating Partnership will have the right to cause the Operating Partnership to redeem their limited partnership units for cash equal to the value of an equivalent number of shares, or, at the Company’s option, the Company may purchase such limited partners' limited partnership units by issuing one share of common stock for each limited partnership unit redeemed. These rights may not be exercised under certain circumstances which could cause the Company to lose its REIT election. Furthermore, limited partners may exercise their redemption rights only after their limited partnership units have been outstanding for one year. The limited partnership units are reported on the consolidated balance sheets as noncontrolling interests. The following summarizes the activity for noncontrolling interests for the years ended December 31, 2017 , 2016 and 2015 : Year Ended December 31, 2017 2016 2015 Beginning balance $ 84 $ 98 $ 139 Distributions to noncontrolling interests (11 ) (11 ) (11 ) Net income (loss) 3 (3 ) (30 ) Ending balance $ 76 $ 84 $ 98

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Summarized below are the related-party costs incurred by the Company for the years ended December 31, 2017 , 2016 and 2015 , respectively, and any related amounts payable as of December 31, 2017 and 2016 : Incurred as of December 31, Payable as of December 31, 2017 2016 2015 2017 2016 Expensed Acquisition fees and expenses $ — $ 6,324 $ 11,438 $ — $ — Operating expenses 2,336 1,622 1,911 658 18 Asset management fees 8,027 6,413 2,624 — 807 Property management fees 1,799 1,052 333 158 143 Performance distributions 2,394 — — 2,394 — Advisory Fees 2,550 — — 762 — Capitalized/Offering Acquisition fees and expenses (1) 1,099 7,606 — — — Organization and offering expense 192 — 3,150 192 — Other costs advanced by the Advisor 662 304 2,598 285 12 Preferred offering costs (2) — — 375 — — Selling commissions (3) 1,128 11,397 16,303 — 54 Dealer Manager fees (4) 393 3,949 7,303 — 18 Stockholder servicing fee 660 17,449 25 12,377 16,020 Advisor Advances: (5) Organization and offering expenses 179 2,634 382 8 2,477 Dealer Manager fees 853 8,069 765 62 2,932 Total $ 22,272 $ 66,819 $ 47,207 $ 16,896 $ 22,481 (1) Effective September 20, 2017, the Advisor is not entitled to acquisition fees, disposition fees or financing fees; provided, however, that the Advisor will receive the compensation set forth in the Original Advisory Agreement for the Company’s investment in an approximately 1,000,000 square foot property located at 39000 Amrheim Road, Livonia, Michigan 48150 with a total transaction price of approximately $80 million . (2) The Company recognized a redemption premium on preferred units issued to an affiliate of approximately $0.4 million , which represented a write-off of original issuance costs. (3) On September 18, 2017, the Company and the Dealer Manager entered into a dealer manager agreement for the Follow-On Offering. See the "Dealer Manager Agreement" section below for details regarding selling commissions and dealer manager fees. (4) The Dealer Manager continues to receive a stockholder servicing fee with respect to Class AA shares as detailed in the Company's IPO prospectus. The stockholder servicing fee is paid quarterly and accrues daily in an amount equal to 1/365th of 1% of the NAV per share of the Class AA shares, up to an aggregate of 4% of the gross proceeds of Class AA shares sold. The Company will cease paying the stockholder servicing fee with respect to the Class AA shares at the earlier of (i) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of shares in the Company's IPO (excluding proceeds from sales pursuant to the related DRP); (ii) the fourth anniversary of the last day of the fiscal quarter in which the Company's IPO terminated; (iii) the date that such Class AA share is redeemed or is no longer outstanding; and (iv) the occurrence of a merger, listing on a national securities exchange, or an extraordinary transaction. (5) Pursuant to the Original Advisory Agreement, commencing November 2, 2015, the Company remained obligated to reimburse the Advisor for organizational and offering costs incurred after such date. Terms of the organizational and offering costs are included in the Company's 2016 Annual Report on Form 10-K filed on March 15, 2017. Advisory Agreement In connection with the Follow-On Offering, on September 20, 2017, the Company entered into the Advisory Agreement with the Advisor and the Operating Partnership. The Advisory Agreement is substantially similar to the Original Advisory Agreement, except that the Company will not pay the Advisor any acquisition, financing or other similar fees from proceeds raised in the Follow-On Offering in connection with making investments and will instead pay the Advisor an advisory fee that will be payable in arrears on a monthly basis and accrues daily in an amount equal to 1/365th of 1.25% of the NAV for each class of common stock for each day. Performance Distribution So long as the Advisory Agreement has not been terminated (including by means of non-renewal), the Advisor will hold a special limited partner interest in the Operating Partnership that entitles it to receive a distribution from the Operating Partnership equal to 12.5% of the Total Return, subject to a 5.5% Hurdle Amount and a High Water Mark, with a Catch-Up (each term as defined below). Such distribution will be made annually and accrue daily. Specifically, the Advisor will be entitled to a performance distribution in an amount equal to: - First, if the Total Return for the applicable period exceeds the sum of (i) the Hurdle Amount for that period and (ii) the Loss Carryforward Amount (any such excess, "Excess Profits"), 100% of such annual Excess Profits until the total amount distributed to the Advisor equals 12.5% of the sum of (x) the Hurdle Amount for that period and (y) any amount distributed to the Advisor pursuant to this clause (this is commonly referred to as a "Catch-Up"); and - Second, to the extent there are remaining Excess Profits, 12.5% of such remaining Excess Profits. "Total Return" for any period since the end of the prior calendar year shall equal the sum of: (i) all distributions accrued or paid (without duplication) on the Operating Partnership units outstanding at the end of such period since the beginning of the then current calendar year plus (ii) the change in aggregate NAV of such units since the beginning of the year, before giving effect to (x) changes resulting solely from the proceeds of issuances of Operating Partnership units, (y) any allocation/accrual of the performance distribution and (z) applicable distribution fee and stockholder servicing fee expenses (including any payments made to us for payment of such expenses). For the avoidance of doubt, the calculation of the Total Return will (i) include any appreciation or depreciation in the NAV of units issued during the then current calendar year but (ii) exclude the proceeds from the initial issuance of such units. "Hurdle Amount" for any period during a calendar year means that amount that results in a 5.5% annualized internal rate of return on the NAV of the Operating Partnership units outstanding at the beginning of the then current calendar year and all Operating Partnership units issued since the beginning of the then current calendar year, taking into account the timing and amount of all distributions accrued or paid (without duplication) on all such units and all issuances of the Operating Partnership units over the period and calculated in accordance with recognized industry practices. The ending NAV of the Operating Partnership units used in calculating the internal rate of return will be calculated before giving effect to any allocation/accrual of the performance distribution and applicable distribution fee and stockholder servicing fee expenses. For the avoidance of doubt, the calculation of the Hurdle Amount for any period will exclude any Operating Partnership units redeemed during such period, which units will be subject to the performance distribution upon redemption as described below. Except as described in the Loss Carryforward Amount below, any amount by which the Total Return falls below the Hurdle Amount will not be carried forward to subsequent periods. "Loss Carryforward Amount" shall initially equal zero and shall cumulatively increase by the absolute value of any negative annual Total Return and decrease by any positive annual Total Return, provided that the Loss Carryforward Amount shall at no time be less than zero and provided further that the calculation of the Loss Carryforward Amount will exclude the Total Return related to any Operating Partnership units redeemed during such year, which units will be subject to the performance distribution upon redemption as described below. The effect of the Loss Carryforward Amount is that the recoupment of past annual Total Return losses will offset the positive annual Total Return for purposes of the calculation of the Advisor’s performance distribution. This is referred to as a "High Water Mark." The Advisor will also be allocated a performance distribution with respect to all Operating Partnership units that are redeemed at the end of any quarter (in connection with redemptions of the Company's shares in the share redemption programs) in an amount calculated as described above with the relevant period being the portion of the year for which such unit was outstanding, and proceeds for any such unit redemption will be reduced by the amount of any such performance distribution. Distributions on the performance distribution may be paid in cash or Class I units of the Operating Partnership, at the election of the Advisor. In 2017, the performance distribution was prorated for the portion of the calendar year that the Follow-On Offering was effective. Operating Expenses The Advisor and its affiliates are entitled to reimbursement for certain expenses incurred on behalf of the Company in connection with providing administrative services, including related personnel costs; provided, however, the Advisor must reimburse the Company for the amount, if any, by which total operating expenses (as defined), including advisory fees, paid during the previous 12 months then ended exceeded the greater of: (i) 2% of the Company’s average invested assets for that 12 months then ended; or (ii) 25% of the Company’s net income, before any additions to reserves for depreciation, bad debts or other expenses connected with the acquisition and disposition of real estate interests and before any gain from the sale of the Company’s assets, for that fiscal year, unless the Company’s board of directors has determined that such excess expenses were justified based on unusual and non-recurring factors. The Advisor may waive or defer all or a portion of these reimbursements or elect to receive Class I shares or Class I units of the Operating Partnership in lieu of these reimbursements at any time and from time to time, in its sole discretion. For the years ended December 31, 2017 and 2016 , the Company’s total operating expenses did not exceed the 2%/25% guideline. The Company reimbursed the Advisor and its affiliates a portion of the compensation paid by the Advisor and its affiliates for the Company's principal financial officer, Javier F. Bitar, executive vice president, David C. Rupert, and vice president and secretary, Howard S. Hirsch of approximately $0.7 million and $0.5 million , which is included in offering costs for the years ended December 31, 2017 and 2016 , for services provided to the Company, for which the Company does not pay the Advisor a fee. In addition, the Company incurred approximately $0.2 million in reimbursable expenses to the Advisor for services provided to the Company by certain of its other executive officers for each of the years ended December 31, 2017 and 2016 . The reimbursable expenses include components of salaries, bonuses, benefits and other overhead charges and are based on the percentage of time each executive officer spends on the Company's affairs. Dealer Manager Agreement The Company entered into a dealer manager agreement and associated form of participating dealer agreement (the "Dealer Manager Agreement") with the Dealer Manager. The terms of the Dealer Manager Agreement are substantially similar to the terms of the dealer manager agreement from the Company's IPO, except as it relates to the share classes offered and the fees to be received by the Dealer Manager (terms of the previous dealer manager agreement are included in the Company's 2016 Annual Report on Form 10-K filed on March 15, 2017). Pursuant to the Dealer Manager Agreement, the Company will pay to the Dealer Manager selling commissions of up to 3.0% of the total purchase price for each sale of Class T shares and selling commissions of up to 3.5% of the total purchase price for each sale of Class S shares. The Company will not pay to the Dealer Manager any selling commissions in respect of the purchase of any Class D shares, Class I shares or DRP shares. The Company also will pay to the Dealer Manager dealer manager fees of up to 0.5% of the total purchase price for each sale of Class T shares. The Company will not pay to the Dealer Manager any dealer manager fees in respect of the purchase of any Class S shares, Class D shares, Class I shares or DRP shares. Substantially all of the selling commissions and dealer manager fees may be reallowed by the Dealer Manager to the participating broker-dealers who sold the shares giving rise to such selling commissions and dealer manager fees. Distribution Fees Subject to Financial Industry Regulatory Authority, Inc.'s limitations on underwriting compensation, under the Dealer Manager Agreement the Company will pay the Dealer Manager a distribution fee for ongoing services rendered to stockholders by participating broker-dealers or broker-dealers servicing investors’ accounts, referred to as servicing broker-dealers. The fee accrues daily and is paid monthly in arrears and is calculated based on the average daily NAV for the applicable month (the “Average NAV”). The distribution fees for the different share classes are as follows: (i) with respect to the outstanding Class T shares equal to 1/365th of 1.0% of the Average NAV of the outstanding Class T shares for each day, consisting of an advisor distribution fee of 1/365th of 0.75% and a dealer distribution fee of 1/365th of 0.25% of the Average NAV of the Class T shares for each day; (ii) with respect to the outstanding Class S shares equal to 1/365th of 1.0% of the Average NAV of the outstanding Class S shares for each day; and (iii) with respect to the outstanding Class D shares equal to 1/365th of 0.25% of the Average NAV of the outstanding Class D shares for each day. The Company will not pay a distribution fee with respect to the outstanding Class I shares. The distribution fees will accrue daily and be paid monthly in arrears. The Dealer Manager will reallow the distribution fees to participating broker-dealers and servicing broker-dealers for ongoing services performed by such broker-dealers, and will retain any such distribution fees to the extent a broker-dealer is not eligible to receive them for failure to provide such services. The Dealer Manager will waive the distribution fees for any purchases by affiliates of the Company. The Company will cease paying the distribution fee with respect to any Class T share, Class S share or Class D share held in a stockholder's account at the end of the month in which the Dealer Manager in conjunction with the transfer agent determines that total selling commissions, dealer manager fees and distribution fees paid with respect to all shares from the Follow-On Offering held by such stockholder within such account would exceed, in the aggregate, 9.0% (or a lower limit as set forth in any applicable agreement between the Dealer Manager and a participating broker-dealer) of the gross proceeds from the sale of such shares (including the gross proceeds of any shares issued under the DRP with respect thereto). At the end of such month, such Class T share, Class S share or Class D share (and any shares issued under the DRP with respect thereto) will convert into a number of Class I shares (including any fractional shares) with an equivalent NAV as such share. In addition, the Company will cease paying the distribution fee on the Class T shares, Class S shares and Class D shares on the earlier to occur of the following: (i) a listing of the Company's shares, (ii) a merger or consolidation with or into another entity, or the sale or other disposition of all or substantially all of the Company's assets, including any liquidation of the Company or (iii) the date following the completion of the primary portion of the Follow-On Offering on which, in the aggregate, underwriting compensation from all sources in connection with the Follow-On Offering, including selling commissions, dealer manager fees, the distribution fee and other underwriting compensation, is equal to 9.0% of the gross proceeds from the Company's primary offering. Property Management Agreement In the event that the Company contracts directly with non-affiliated third party property managers with respect to its individual properties, the Company pays the Property Manager an oversight fee equal to 1.0% of the gross revenues of the property managed, plus reimbursable costs as applicable. Reimbursable costs and expenses include wages and salaries and other expenses of employees engaged in operating, managing and maintaining the Company's properties, as well as certain allocations of office, administrative, and supply costs. The Property Manager may waive or defer all or a portion of these reimbursements or elect to receive Class I shares or Class I units of the Operating Partnership in lieu of these reimbursements at any time and from time to time, in its sole discretion. In the event that the Company contracts directly with the Property Manager with respect to a particular property, the Company pays the Property Manager aggregate property management fees of up to 3.0% , or greater if the lease so allows, of gross revenues received for management of the Company's properties, plus reimbursable costs as applicable. These property management fees may be paid or re-allowed to third party property managers if the Property Manager contracts with a third party. In no event will the Company pay both a property management fee to the Property Manager and an oversight fee to the Property Manager with respect to a particular property. In addition, the Company may pay the Property Manager or its designees a leasing fee in an amount equal to the fee customarily charged by others rendering similar services in the same geographic area. The Company may also pay the Property Manager or its designees a construction management fee for planning and coordinating the construction of any tenant directed improvements for which the Company is responsible to perform pursuant to lease concessions, including tenant-paid finish-out or improvements. The Property Manager shall also be entitled to a construction management fee of 5.0% of the cost of improvements. In the event that the Property Manager assists with the development or redevelopment of a property, the Company may pay a separate market-based fee for such services. Conflicts of Interest The Sponsor, Advisor, Property Manager and their officers and certain of their key personnel and their respective affiliates currently serve as key personnel, advisors, managers and sponsors or co-sponsors to some or all of 12 other programs affiliated with the Sponsor, including Griffin Capital Essential Asset REIT, Inc. ("GCEAR"), Griffin-American Healthcare REIT III, Inc. ("GAHR III"), and Griffin-American Healthcare REIT IV, Inc. ("GAHR IV"), all of which are publicly-registered, non-traded real estate investment trusts, and Griffin Institutional Access Real Estate Fund ("GIA Real Estate Fund") and Griffin Institutional Access Credit Fund ("GIA Credit Fund"), both of which are non-diversified, closed-end management investment companies that are operated as interval funds under the Investment Company Act of 1940, as amended (the "1940 Act"). Because these persons have competing demands on their time and resources, they may have conflicts of interest in allocating their time between the Company’s business and these other activities. Some of the material conflicts that the Advisor, the Dealer Manager or its affiliates will face are (1) competing demand for time of the Advisor’s executive officers and other key personnel from the Sponsor and other affiliated entities; (2) determining if certain investment opportunities should be recommended to the Company or another program sponsored or co-sponsored by the Sponsor; and (3) influence of the fee structure under the Advisory Agreement and distribution structure of the operating partnership agreement that could result in actions not necessarily in the long-term best interest of the Company's stockholders. The board of directors has adopted the Sponsor’s acquisition allocation policy as to the allocation of acquisition opportunities among GCEAR and the Company, which is as follows: The Sponsor will allocate potential investment opportunities to the Company and GCEAR based on the following factors: • the investment objectives of each program; • the amount of funds available to each program; • the financial impact of the acquisition on each program, including each program’s earnings and distribution ratios; • various strategic considerations that may impact the value of the investment to each program; • the effect of the acquisition on concentration/diversification of each program’s investments; and • the income tax effects of the purchase to each program. In the event all acquisition allocation factors have been exhausted and an investment opportunity remains equally suitable for the Company and GCEAR, the Sponsor will offer the investment opportunity to the REIT that has had the longest period of time elapse since it was offered an investment opportunity. If the Sponsor no longer sponsors GCEAR, then, in the event that an investment opportunity becomes available that is suitable, under all of the factors considered by the Advisor, for both the Company and one or more other entities affiliated with the Sponsor, the Sponsor has agreed to present such investment opportunities to the Company first, prior to presenting such opportunities to any other programs sponsored by or affiliated with the Sponsor. In determining whether or not an investment opportunity is suitable for more than one program, the Advisor, subject to approval by the board of directors, shall examine, among others, the following factors: • anticipated cash flow of the property to be acquired and the cash requirements of each program; • effect of the acquisition on diversification of each program’s investments; • policy of each program relating to leverage of properties; • income tax effects of the purchase to each program; • size of the investment; • no significant increase in the cost of financing; and • amount of funds available to each program and the length of time such funds have been available for investment. Economic Dependency The Company will be dependent on the Advisor and the Dealer Manager for certain services that are essential to the Company, including the sale of the Company's shares of common stock available for issue, the identification, evaluation, negotiation, purchase and disposition of properties and other investments, management of the daily operations of the Company’s real estate portfolio, and other general and administrative responsibilities. In the event that these companies are unable to provide the respective services, the Company will be required to obtain such services from other resources.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation From time to time, the Company may become subject to legal proceedings, claims and litigation arising in the ordinary course of business. The Company is not a party to any material legal proceedings, nor is the Company aware of any pending or threatened litigation that would have a material adverse effect on the Company’s business, operating results, cash flows or financial condition should such litigation be resolved unfavorably.

Declaration of Distributions

Declaration of Distributions	12 Months Ended
	Dec. 31, 2017
Declaration of Distributions [Abstract]
Declaration of Distributions	Declaration of Distributions The Company paid cash distributions in the amount of $0.00150684932 per day, before adjustments of class-specific expenses, per Class T share, Class S share, Class D share, Class I share, Class A share, Class AA share and Class AAA share on the outstanding shares of common stock payable to stockholders of record at the close of business on each day during the period from September 20, 2017 through December 31, 2017 . Such distributions payable to each stockholder of record were paid on such date after the end of each month during the period as determined by the Company's Chief Executive Officer. On December 4, 2017, the Company’s board of directors declared cash distributions in the amount of $0.00150684932 per day, subject to adjustments for class-specific expenses, per Class T share, Class S share, Class D share, Class I share, Class A share, Class AA share, and Class AAA on the outstanding shares of common stock payable to stockholders of record at the close of business on each day during the period from January 1, 2018 through March 31, 2018. Such distributions payable to each stockholder of record will be paid on such date after the end of each month during the period as determined by the Company's Chief Executive Officer.

Selected Quarterly Financial Da

Selected Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (unaudited)	Selected Quarterly Financial Data (Unaudited) Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2017 and 2016 : 2017 First Quarter Second Quarter Third Quarter Fourth Quarter Total revenue $ 25,972 $ 26,546 $ 27,349 $ 27,514 Net income $ 3,124 $ 3,365 $ 3,099 $ 1,531 Net income attributable to common stockholders $ 3,123 $ 3,364 $ 3,098 $ 1,531 Net income per share (1) $ 0.04 $ 0.04 $ 0.04 $ 0.03 2016 First Quarter Second Quarter Third Quarter Fourth Quarter Total revenue $ 12,502 $ 13,330 $ 16,334 $ 20,646 Net (loss)/income $ (1,141 ) $ (2,825 ) $ (2,736 ) $ 595 Net (loss)/income attributable to common stockholders $ (1,140 ) $ (2,824 ) $ (2,735 ) $ 595 Net (loss)/income per share (1) $ (0.03 ) $ (0.06 ) $ (0.05 ) $ 0.01 (1) Amounts were retroactively adjusted to reflect stock dividends. (See Note 2, Basis of Presentation and Summary of Significant Accounting Policies, for additional detail).

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Status of the Offering As of March 7, 2018 , the Company had issued 4,818,911 and 299,515 shares of the Company’s common stock pursuant to the DRP and Follow-On Offering, respectively, for approximately $45.6 million and $2.8 million , respectively. Redemptions On January 31, 2018, the Company redeemed 217,088 shares of common stock for approximately $2.0 million at a weighted average price per share of $9.09 . Declaration of Distributions On March 8, 2018, the Company’s board of directors declared cash distributions in the amount of $0.00150684932 per day, subject to adjustments for class-specific expenses, per Class T share, Class S share, Class D share, Class I share, Class A share, Class AA share, and Class AAA on the outstanding shares of common stock payable to stockholders of record at the close of business on each day during the period from April 1, 2018 through June 30, 2018. Such distributions payable to each stockholder of record will be paid on such date after the end of each month during the period as determined by the Company's Chief Executive Officer. Performance Distribution The Company's Advisor holds a special limited partner interest in the Operating Partnership that entitles it to receive a special distribution from the Operating Partnership equal to 12.5% of the total return, subject to certain limitations, which is paid annually (See Note 10, Related Party Transactions , for additional details). On February 16, 2018, the Company paid in cash approximately $1.2 million and issued approximately $1.2 million in limited partnership units to the Advisor.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2017
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate and Accumulated Depreciation	Initial Cost to Company Cost Capitalized Subsequent to Acquisition Gross Carrying Amount at Life on which depreciation in latest income statement is computed Property Property Type ST Encumbrances Land Building and Improvements (1) Building and Land Building and Improvements Total Accumulated Depreciation and Amortization Date of Construction Date of Acquisition Owens Corning Industrial NC $ 3,300 $ 575 $ 5,167 $ — $ 575 $ 5,167 $ 5,742 $ 485 N/A 3/9/2015 5-40 years Westgate II Office TX 34,200 3,732 55,101 — 3,732 55,101 58,833 6,488 N/A 4/1/2015 5-40 years Administrative Office of Pennsylvania Courts Office PA 6,070 1,207 8,936 — 1,207 8,936 10,143 994 N/A 4/22/2015 5-40 years American Express Center Data Center/Office AZ 54,900 5,750 113,670 — 5,750 113,670 119,420 17,706 N/A 5/11/2015 5-40 years MGM Corporate Center Office NV 18,180 4,260 28,705 405 4,260 29,110 33,370 3,387 N/A 5/27/2015 5-40 years American Showa Industrial OH 10,320 1,453 15,747 — 1,453 15,747 17,200 1,475 N/A 5/28/2015 5-40 years Huntington Ingalls Industrial VA — 5,415 29,836 18 5,415 29,854 35,269 2,778 N/A 6/26/2015 5-40 years Wyndham Office NJ — 5,696 76,532 — 5,696 76,532 82,228 6,601 N/A 6/26/2015 5-40 years Exel Distribution Center OH — 1,988 13,958 — 1,988 13,958 15,946 1,461 N/A 6/30/2015 5-40 years Rapiscan Systems Office MA — 2,350 9,482 — 2,350 9,482 11,832 1,132 N/A 7/1/2015 5-40 years FedEx Freight Industrial OH — 2,774 25,913 — 2,774 25,913 28,687 2,331 N/A 7/22/2015 5-40 years Aetna Office AZ — 1,853 20,481 — 1,853 20,481 22,334 1,243 N/A 7/29/2015 5-40 years Bank of America I Office CA — 5,491 23,514 138 5,491 23,652 29,143 3,724 N/A 8/14/2015 5-40 years Bank of America II Office CA — 9,206 20,204 — 9,206 20,204 29,410 3,674 N/A 8/14/2015 5-40 years Atlas Copco Office MI — 1,480 16,490 — 1,480 16,490 17,970 1,626 N/A 10/1/2015 5-40 years Toshiba TEC Office NC — 4,130 36,821 — 4,130 36,821 40,951 2,691 N/A 1/21/2016 5-40 years NETGEAR Office CA — 20,726 25,887 43 20,726 25,930 46,656 2,148 N/A 5/17/2016 5-40 years Nike Office OR — 5,988 42,397 24 5,988 42,421 48,409 4,603 N/A 6/16/2016 5-40 years Zebra Technologies Office IL — 5,238 56,526 — 5,238 56,526 61,764 3,843 N/A 8/1/2016 5-40 years WABCO Industrial SC — 1,302 12,598 — 1,302 12,598 13,900 682 N/A 9/14/2016 5-40 years IGT Office NV — 6,325 64,441 40 6,325 64,481 70,806 2,695 N/A 9/27/2016 5-40 years 3M Industrial IL — 5,320 62,247 — 5,320 62,247 67,567 2,475 N/A 10/25/2016 5-40 years Amazon Industrial OH — 5,331 85,770 — 5,331 85,770 91,101 2,903 N/A 11/18/2016 5-40 years Zoetis Office NJ — 3,375 42,265 — 3,375 42,265 45,640 1,749 N/A 12/16/2016 5-40 years Southern Company Office AL — 6,605 122,679 45 6,605 122,724 129,329 3,488 N/A 12/22/2016 5-40 years Allstate Office CO — 1,808 14,090 200 1,808 14,290 16,098 679 N/A 1/31/2017 5-40 years MISO Office IN — 3,104 26,014 — 3,104 26,014 29,118 844 N/A 5/15/2017 5-40 years Total (3) $ 126,970 $ 122,482 $ 1,055,471 $ 913 $ 122,482 $ 1,056,384 $ 1,178,866 $ 83,905 (1) Building and improvements include tenant origination and absorption costs. (2) The acquisitions were funded by the credit facility. (3) As of December 31, 2017 , the aggregate cost of real estate the Company and consolidated subsidiaries own for federal income tax purposes was approximately $1.1 billion (unaudited). Activity for the year ended December 31, 2017 2016 2015 Real estate facilities Balance at beginning of year $ 1,133,055 $ 516,965 $ — Acquisitions 45,016 615,972 516,965 Improvements 576 38 — Construction-in-progress 219 80 — Balance at end of year $ 1,178,866 $ 1,133,055 $ 516,965 Accumulated depreciation Balance at beginning of year $ 39,955 $ 12,061 $ — Depreciation and amortization expense 43,950 27,894 12,061 Balance at end of year $ 83,905 $ 39,955 $ 12,061 Real estate facilities, net $ 1,094,961 $ 1,093,100 $ 504,904

Basis of Presentation and Sum23

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition Leases associated with the acquisition and contribution of certain real estate assets (see Note 3, Real Estate ) have net minimum rent payment increases during the term of the lease and are recorded to rental revenue on a straight-line basis, commencing as of the contribution or acquisition date. If a lease provides for contingent rental income, the Company will defer the recognition of contingent rental income, such as percentage rents, until the specific target that triggers the contingent rental income is achieved. Tenant reimbursement revenue, which is comprised of additional amounts collected from tenants for the recovery of certain operating expenses, including repair and maintenance, property taxes and insurance, and capital expenditures, to the extent allowed pursuant to the lease (collectively, "Recoverable Expenses"), is recognized as revenue when the additional rent is due. Recoverable Expenses to be reimbursed by a tenant are determined based on the Company's estimate of the property's operating expenses for the year, pro rated based on leased square footage of the property, and are collected in equal installments as additional rent from the tenant, pursuant to the terms of the lease. At least quarterly, the Company reconciles the amount of additional rent paid by the tenant during the quarter to the actual amount of the Recoverable Expenses incurred by the Company for the same period. The difference, if any, is either charged or credited to the tenant pursuant to the provisions of the lease. In certain instances, the lease may restrict the amount the Company can recover from the tenant such as a cap on certain or all property operating expenses.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.
Changes in Consolidated Financial Statements Presentation	Change in Consolidated Financial Statements Presentation Certain amounts in the Company's prior period consolidated financial statements have been reclassified to conform to the current period presentation. During the year ended December 31, 2017, the Company elected to early adopt Accounting Standards Update ("ASU") No. 2016-18 (as discussed below). As a result, the Company no longer presents transfers between cash and restricted cash in the consolidated statements of cash flows. Instead, restricted cash is included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows.
Principles of Consolidation	Principles of Consolidation The Company's financial statements, and the financial statements of the Company's Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by the Company is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. Cash and cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value. There were no cash equivalents, nor were there restrictions on the use of the Company’s cash balance as of December 31, 2017 and 2016 . The Company maintains its cash accounts with major financial institutions. The cash balances consist of business checking accounts. These accounts are insured by the Federal Deposit Insurance Corporation up to $250,000 at each institution. The Company has not experienced any losses with respect to cash balances in excess of government provided insurance. Management believes there was no significant concentration of credit risk with respect to these cash balances as of December 31, 2017 .
Restricted Cash	Restricted Cash In conjunction with acquisitions of certain assets, as required by certain lease provisions or certain lenders in conjunction with an acquisition or debt financing, or credits received by the seller of certain assets, the Company assumed or funded reserves for specific property improvements and deferred maintenance, re-leasing costs, and taxes and insurance, which are included on the consolidated balance sheets as restricted cash.
Real Estate Purchase Price Allocation	Real Estate Purchase Price Allocation In January 2017, the FASB issued ASU No. 2017-01, Business Combinations, (see “Recently Issued Accounting Pronouncements” below) that clarifies the framework for determining whether an integrated set of assets and activities meets the definition of a business. The revised framework establishes a screen for determining whether an integrated set of assets and activities is a business and narrows the definition of a business, which is expected to result in fewer transactions being accounted for as business combinations. Acquisitions of integrated sets of assets and activities that do not meet the definition of a business are accounted for as asset acquisitions. This update is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted for transactions that have not been reported in previously issued (or available to be issued) financial statements. The Company adopted this accounting standard early effective October 1, 2016. As a result of the Company's adoption of ASU No. 2017-01, Business Combinations, the Company anticipates that many of its future acquisitions will be treated as asset acquisitions, which will result in a lower amount of acquisition-related costs being expensed on the Company's consolidated statement of operations, as the majority of those costs will be capitalized and included as part of the relative fair value allocation of the purchase price. The Company applies the provisions in ASC 805-10, Business Combinations , to account for the acquisition of real estate, or real estate related assets, in which a lease, or other contract, is in place representing an active revenue stream, as an asset acquisition (in rare cases, a business combination). In accordance with the provisions of ASC 805-10 (on an asset acquisition), the Company recognizes an asset acquisition, the assets acquired, the liabilities assumed and any noncontrolling interest in the acquired entity at their relative fair values. The accounting provisions have also established that transaction costs associated with an asset acquisition are capitalized. Acquired in-place leases are valued as above-market or below-market as of the date of acquisition. The valuation is measured based on the present value (using an interest rate, which reflects the risks associated with the leases acquired) of the difference between (a) the contractual amounts to be paid pursuant to the in-place leases and (b) management’s estimate of fair market lease rates for the corresponding in-place leases over a period equal to the remaining non-cancelable term of the lease for above-market leases, taking into consideration below-market extension options for below-market leases. In addition, renewal options are considered and will be included in the valuation of in-place leases if (1) it is likely that the tenant will exercise the option, and (2) the renewal rent is considered to be sufficiently below a fair market rental rate at the time of renewal. The above-market and below-market lease values are capitalized as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases. The aggregate relative fair value of in-place leases includes direct costs associated with obtaining a new tenant, opportunity costs associated with lost rentals, which are avoided by acquiring an in-place lease, and tenant relationships. Direct costs associated with obtaining a new tenant include commissions, tenant improvements, and other direct costs and are estimated using methods similar to those used in independent appraisals and management’s consideration of current market costs to execute a similar lease. These direct costs are considered intangible lease assets and are included with real estate assets on the consolidated balance sheets. The intangible lease assets are amortized to expense over the remaining terms of the respective leases. The value of opportunity costs is calculated using the contractual amounts to be paid, including real estate taxes, insurance, and other operating expenses, pursuant to the in-place leases over a market lease-up period for a similar lease. Customer relationships are valued based on management’s evaluation of certain characteristics of each tenant’s lease and the Company’s overall relationship with that respective tenant. Characteristics management will consider in allocating these values include the nature and extent of the Company’s existing business relationships with tenants, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals (including those existing under the terms of the lease agreement), among other factors. These intangibles will be included in intangible lease assets on the consolidated balance sheets and are amortized to expense over the remaining term of the respective leases. The determination of the relative fair values of the assets and liabilities acquired requires the use of significant assumptions about current market rental rates, rental growth rates, discount rates and other variables.
Depreciation and Amortization	Depreciation and Amortization The purchase price of real estate acquired and the costs related to development, construction, and property improvements are capitalized. Repairs and maintenance costs include all costs that do not extend the useful life of the real estate asset and are expensed as incurred. The Company considers the period of future benefit of an asset to determine the appropriate useful life. The Company anticipates the estimated useful lives of its assets by class to be generally as follows: Buildings 40 years Building Improvements 5-20 years Land Improvements 15-25 years Tenant Improvements Shorter of estimated useful life or remaining contractual lease term Tenant Origination and Absorption Cost Remaining contractual lease term In-place Lease Valuation Remaining contractual lease term with consideration as to below-market extension options for below-market leases If a lease is terminated or amended prior to its scheduled expiration, the Company will accelerate the remaining useful life of the unamortized lease-related costs.
Impairment of Real Estate and Related Intangible Assets	Impairment of Real Estate and Related Intangible Assets The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of real estate and related intangible assets may not be recoverable, including credit ratings of all tenants to stay abreast of any material changes in credit quality. The Company monitors tenant credit by (1) reviewing the credit ratings of tenants (or their parent companies or lease guarantors) that are rated by nationally recognized rating agencies; (2) reviewing financial statements and related metrics and information that are publicly available or that are required to be provided pursuant to the lease; (3) monitoring news reports and press releases regarding the tenants (or their parent companies or lease guarantors), and their underlying business and industry; and (4) monitoring the timeliness of rent collections. When indicators of potential impairment are present that indicate that the carrying amounts of real estate and related intangible assets may not be recoverable, management assesses whether the carrying value of the assets will be recovered through the future undiscounted operating cash flows expected from the use of the assets and the eventual disposition. If, based on this analysis, the Company does not believe that it will be able to recover the carrying value of the asset, the Company will record an impairment charge to the extent the carrying value exceeds the net present value of the estimated future cash flows of the asset. Projections of expected future undiscounted cash flows require management to estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, discount rates, the number of months it takes to re-lease the property and the number of years the property is held for investment.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities ASC Topic 815: Derivatives and Hedgin g ("ASC 815"), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, ASC 815 requires qualitative disclosures regarding the Company’s objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, the Company recorded all derivatives on the consolidated balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, and whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. See Note 5, Interest Rate Contracts.
Income Taxes	Income Taxes The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Code") for the year ended December 31, 2015. To qualify as a REIT, the Company must meet certain organizational and operational requirements, including a requirement to currently distribute at least 90% of the REIT’s ordinary taxable income to stockholders. As a REIT, the Company generally will not be subject to federal income tax on taxable income that is distributed to stockholders. If the Company fails to qualify as a REIT in any taxable year, after the Company initially qualifies to be taxed as a REIT, the Company will then be subject to federal income taxes on the taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Such an event could materially adversely affect net income and net cash available for distribution to stockholders. However, the Company believes that it is organized and will operate in such a manner as to qualify for treatment as a REIT and intends to operate in the foreseeable future in such a manner that it will remain qualified as a REIT for federal income tax purposes. The Company could engage in certain business activities that could have an adverse effect on its REIT qualification. The Company has elected to isolate these business activities in the books and records of the TRS. In general, the TRS may perform additional services for the Company’s tenants and generally may engage in any real estate or non-real estate related business. The TRS will be subject to corporate federal and state income tax. As of December 31, 2017 , the TRS has not commenced operations.
Per Share Data	Per Share Data The Company reports earnings per share for the period as (1) basic earnings per share computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period, and (2) diluted earnings per share computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding, including common stock equivalents. As of December 31, 2017 and December 31, 2016 , there were no material common stock equivalents that would have a dilutive effect on earnings (loss) per share for common stockholders. The Company retroactively adjusted the number of common shares outstanding in accordance with ASC 260-10, Earnings per Share. ASC 260-10 requires retroactively adjusting the computations of basic and diluted earnings per share for all periods presented to reflect the change in capital structure, if the number of common shares outstanding increases as a result of a stock dividend or stock split or decreases as a result of a reverse stock split. If changes in common stock resulting from stock dividends, stock splits, or reverse stock splits occur after the close of the period but before the consolidated financial statements are issued or are available to be issued, the per-share computations for those and any prior-period consolidated financial statements presented shall be based on the new number of shares.
Segment Information	Segment Information ASC Topic 280, Segment Reporting , establishes standards for reporting financial and descriptive information about a public entity’s reportable segments. The Company internally evaluates all of the properties and interests therein as one reportable segment.
Unaudited Data	Unaudited Data Any references to the number of buildings, square footage, number of leases, occupancy, and any amounts derived from these values in the notes to the consolidated financial statements are unaudited and outside the scope of the Company's independent registered public accounting firm's audit of its consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging, that simplifies hedge accounting. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. For cash flow hedges that are highly effective, the new standard requires all changes (effective and ineffective components) in the fair value of the hedging instrument to be recorded in other comprehensive income and to be reclassified into earnings only when the hedged item impacts earnings. Current guidance requires a periodic recognition of hedge ineffectiveness in earnings. Under existing standards a quantitative assessment is made on an ongoing basis to determine if a hedge is highly effective in offsetting changes in cash flows associated with the hedged item. Under the new standard, entities will still be required to perform an initial quantitative test. However, the new standard allows entities to elect to subsequently perform only a qualitative assessment unless facts and circumstances change. The ASU is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. For cash flow hedges in existence at the date of adoption, an entity is required to apply a cumulative-effect adjustment for previously recognized ineffectiveness from retained earnings to accumulated other comprehensive income ("AOCI"), as of the beginning of the fiscal year when an entity adopts the amendments in this ASU. The Company utilizes interest rate hedge agreements to hedge a portion of exposure to variable interest rates primarily associated with borrowings based on London Interbank Offered Rate ("LIBOR"). As a result, all interest rate hedge agreements are designated as cash flow hedges. During the years ended December 31, 2017 and December 31, 2016 , the ineffectiveness related to the Company's interest rate hedge agreement was immaterial. Therefore, the Company does not believe this ASU would have an impact on operating results for the year ended December 31, 2017 . In January 2017, the FASB issued ASU No. 2017-01, Business Combinations, that clarified the definition of a business. The ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The Company adopted this update on October 1, 2016. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash , that will require companies to include restricted cash and restricted cash equivalents with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU will require a disclosure of a reconciliation between the statement of financial position and the statement of cash flows when the statement of financial position includes more than one line item for cash, cash equivalents, restricted cash, and restricted cash equivalents. Entities with material restricted cash and restricted cash equivalents balances will be required to disclose the nature of the restrictions. This ASU is effective for reporting periods beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to all periods presented. The Company elected to early adopt ASU No. 2016-18 for the reporting period ending December 31, 2017 and applied retrospectively to all periods presented. As a result of the adoption of ASU No. 2016-18, the Company no longer presents the changes within restricted cash in the consolidated statements of cash flows. In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments . ASU No. 2016-15 addresses eight specific cash flow issues with the objective of reducing diversity in practice. The cash flow issues include debt prepayment or debt extinguishment costs and proceeds from the settlement of insurance claims. This ASU is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. The Company elected to early adopt ASU No. 2016-15 for the reporting period ending December 31, 2017. There was no change to the Company's consolidated financial statements or notes as a result of adoption. In February 2016, the FASB issued ASU No. 2016-02, Leases ("ASU No. 2016-02"). ASU No. 2016-02 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU No. 2016-02 will direct how the Company accounts for payments from the elements of leases that are generally fixed and determinable at the inception of the lease (“Fixed Lease Payments”) while ASU No. 2014-09 (defined below) will direct how the Company accounts for the non-lease components of lease contracts, primarily expense reimbursements (“Non-Lease Payments”) and the accounting for the disposition of real estate facilities. ASU No. 2016-02 will be effective beginning in the first quarter of 2019. Early adoption of ASU No. 2016-02 as of its issuance is permitted. ASU No. 2016-02 requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. Based on the required adoption date of January 1, 2019, the modified retrospective method for ASU No. 2016-02 requires application of the standard to all leases that exist at, or commence after, January 1, 2017 (beginning of the earliest comparative period presented in the 2019 financial statements), with a cumulative adjustment to the opening balance of accumulated earnings (deficit) on January 1, 2017, for the effect of applying the standard at the date of initial application, and restatement of the amounts presented prior to January 1, 2019. The FASB has also issued a proposed amendment to the standard that would provide an entity an optional transition method to initially account for the impact of the adoption of the standard with a cumulative adjustment to accumulated earnings (deficit) on January 1, 2019 (the effective date of ASU No. 2016-02), rather than January 1, 2017, which would eliminate the need to restate amounts presented prior to January 1, 2019. Under ASU No. 2016-02, an entity may elect a practical expedient package, which allows for (a) an entity need not to reassess whether any expired or existing contracts are or contain leases; (b) an entity need not reassess the lease classification for any expired or existing leases; and (c) an entity need not reassess initial direct costs for any existing leases. These three practical expedients are available as a single election that must be elected as a package and must be consistently applied to all existing leases at the date of adoption. The FASB has also tentatively noted in board meeting minutes of May 2017 that lessors that adopt this package of practical expedients are not expected to reassess expired or existing leases at the date of initial application, which is January 1, 2017 under ASU No. 2016-02, or January 1, 2019, if the Company elects the optional transition method. The FASB noted that the transition provisions generally enable entities to “run off” their existing leases for the remainder of the lease term, which would effectively eliminate the need to calculate adjustment to the opening balance of accumulated earnings (deficit). In January, 2018, the FASB issued a proposed amendment to ASU No. 2016-02 that would allow lessors to elect, as a practical expedient, not to allocate the total consideration to Fixed Lease Payments and Non-Lease Payments based on their relative standalone selling prices. If adopted, this practical expedient will allow lessors to elect a combined single component presentation if (i) the timing and pattern of the revenue recognition for the Fixed Lease Payments and Non-Lease Payments are the same, and (ii) the combined single component of the lease would continue to be classified as an operating lease. The Company does not expect that ASU 2016-02 will impact the Company's accounting for Fixed Lease Payments, because the Company's accounting policy is currently consistent with the provisions of the standard. The Company is currently evaluating the impact of the standard as it relates to Non-Lease Payments. If the proposed practical expedient mentioned above is adopted and the Company elects it, the Company expects payments for expense reimbursements that qualify as Non-Lease Payments will be presented under a single lease component presentation. However, without the proposed practical expedient, the Company expects these reimbursements would be separated into Fixed Lease Payments and Non-Lease Payments. Under ASU No. 2016-02, reimbursements relating to property taxes and insurances are Fixed Lease Payments as the payments relates to the right to use the leased assets, while reimbursements relating to maintenance activities and common area expense are Non-Lease Payments and would be accounted under ASU No. 2014-09 upon the adoption of the ASU No. 2016-02 as these payments for goods or services are transferred separately from the right to use the underlying assets. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”). ASU No. 2014-09 replaces substantially all industry-specific revenue recognition requirements and converges areas under this topic with International Financial Reporting Standards. ASU No. 2014-09 implements a five-step process for customer contract revenue recognition that focuses on transfer of control, as opposed to transfer of risk and rewards. ASU No. 2014-09 also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenues and cash flows from contracts with customers. Other major provisions in ASU No. 2014-09 include capitalizing and amortizing certain contract costs, ensuring the time value of money is considered in the applicable transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. ASU No. 2014-09 was originally effective for reporting periods beginning after December 31, 2016 (for public entities). On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09 by one year to annual reporting periods beginning after December 15, 2017. On July 9, 2015, the FASB affirmed its proposal to defer the effective date to annual reporting periods beginning after December 15, 2017, although entities may elect to adopt the standard as of the original effective date. The Company intends to adopt the guidance using the modified retrospective approach for the fiscal year beginning January 1, 2018. The Company anticipates minimal impact upon adoption of the new accounting guidance on its consolidated financial statements relating to the recognition of gains and losses on the sale of real estate assets as the Company’s current accounting for such transactions is consistent with the new guidance’s core principle. Rental income from leasing arrangements is a substantial portion of the Company’s revenue, is specifically excluded from ASU No. 2014-09 and will be governed by the applicable lease codification ("ASU No. 2016-02"). In conjunction with the adoption of the leasing guidance, the Company is currently in the process of evaluating certain variable payment terms included in these lease arrangements which are governed by ASU No. 2014-09. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) . The amendments clarify how an entity should identify the unit of accounting (i.e., the specified good or service) for the principal versus agent evaluation, and how it should apply the control principle to certain types of arrangements, such as service transactions, by explaining what a principal controls before the specified good or service is transferred to the customer. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements of ASU No. 2014-09 described above. The Company intends to adopt the guidance using the modified retrospective approach for the fiscal year beginning January 1, 2018. The Company anticipates minimal impact upon adoption of the new accounting guidance on its consolidated financial statements relating to the recognition of reporting revenue gross versus net on its consolidated financial statements as the Company’s current accounting for such transactions is consistent with the new guidance’s core principle.

Basis of Presentation and Sum24

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Property, Plant and Equipment	The Company anticipates the estimated useful lives of its assets by class to be generally as follows: Buildings 40 years Building Improvements 5-20 years Land Improvements 15-25 years Tenant Improvements Shorter of estimated useful life or remaining contractual lease term Tenant Origination and Absorption Cost Remaining contractual lease term In-place Lease Valuation Remaining contractual lease term with consideration as to below-market extension options for below-market leases

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2017
Real Estate [Abstract]
Aggregate purchase price of the acquisitions	The purchase price and other acquisition items for the properties acquired during the year ended December 31, 2017 are shown below: Paid to Advisor Property Location Tenant/Major Lessee Acquisition Date Purchase Price Approx. Square Feet Acquisition Fees and Reimbursable Expenses (1) Contingent Advisor Payment (2) Year of Lease Expiration Allstate Lone Tree, CO Allstate Insurance Company 1/31/2017 $ 14,750 (3) 70,300 $ 402 $ 273 2026 MISO Carmel, IN Midcontinent Independent System Operator, Inc. 5/15/2017 $ 28,600 133,400 $ 696 $ 529 2028 (1) Under the Original Advisory Agreement, the fee consisted of a 2.0% base acquisition fee and acquisition expense reimbursement for actual acquisition expenses incurred, estimated to be approximately 1.0% of acquisition value. (2) Under the Original Advisory Agreement, the Advisor was entitled to receive an acquisition fee in an amount up to 3.85% of the contract purchase price for each property the Company acquired. The acquisition fee consisted of a 2.0% base acquisition fee and up to an additional 1.85% contingent advisor payment (the "Contingent Advisor Payment"); provided, however, that $5.0 million of amounts advanced by the Advisor for dealer manager fees and organizational and offering expenses (the "Contingent Advisor Payment Holdback") would be retained by the Company until the later of (a) the termination of the IPO, including any follow-on offerings where the Advisor provides up-front funding of offering fees, or (b) July 31, 2017, at which time such amount would be paid to the Advisor. On July 31, 2017, the Company paid to the Advisor the Contingent Advisor Payment Holdback of $5.0 million , which consisted of amounts previously advanced by the Advisor for dealer manager fees and organizational and offering expenses. (3) The purchase price for the Allstate property was $14.8 million , plus closing costs, less a credit in the amount of $0.4 million applied at closing.
Summary of purchase price allocation	The following summarizes the purchase price allocations for the properties acquired during the year ended December 31, 2017 : Property (1) Land Building and Improvements Tenant Origination and Absorption Cost In-Place Lease Valuation Above Market In-Place Lease Valuation (Below) Market Total Allstate $ 1,808 $ 9,071 $ 5,019 $ — $ (1,001 ) $ 14,897 MISO $ 3,104 $ 18,077 $ 7,937 $ 218 $ — $ 29,336 (1) The Company evaluated the transactions above under the clarified framework for determining whether an integrated set of assets and activities meets the definition of a business, pursuant to ASU No. 2017-01, Business Combinations, issued in January 2017, which the Company early-adopted effective October 1, 2016. Acquisitions that do not meet the definition of a business are accounted for as asset acquisitions. Since the transactions above lacked a substantive process, the transactions did not meet the definition of a business and consequently were accounted for as asset acquisitions. The Company allocated the total consideration (including acquisition costs of approximately $1.2 million ) to the individual assets and liabilities acquired on a relative fair value basis.
Schedule of future minimum net rent payments	The future minimum contractual rent payments pursuant to the current lease terms are shown in the table below. The Company's current leases have expirations ranging from 2020 to 2044. As of December 31, 2017 2018 $ 71,662 2019 78,887 2020 80,492 2021 72,677 2022 73,538 Thereafter 528,803 Total $ 906,059
Schedule of in-place lease valuation	The in-place lease was measured against comparable leasing information and the present value of the difference between the contractual, in-place rent and the fair market rent was calculated using, as the discount rate, the capitalization rate utilized to compute the value of the real estate at acquisition. The intangible assets are amortized over the remaining lease terms of the respective properties, which on a weighted-average basis, was approximately 10.3 and 11.4 years as of December 31, 2017 and December 31, 2016 , respectively. December 31, 2017 December 31, 2016 In-place lease valuation (above market) $ 4,046 $ 3,828 In-place lease valuation (above market), accumulated amortization (752 ) (300 ) Intangible assets, net $ 3,294 $ 3,528 In-place lease valuation (below market) $ (62,070 ) $ (61,069 ) In-place lease valuation (below market) - accumulated amortization 10,775 5,750 In-place lease valuation (below market), net $ (51,295 ) $ (55,319 ) Tenant origination and absorption cost $ 240,364 $ 227,407 Tenant origination and absorption cost - accumulated amortization (47,165 ) (23,409 ) Tenant origination and absorption cost, net $ 193,199 $ 203,998
Schedule of amortization expense	The amortization of the intangible assets and other leasing costs for the respective periods is as follows: Amortization (income) expense for the year ended December 31, 2017 2016 2015 In-place lease valuation $ (4,573 ) $ (3,592 ) $ (1,858 ) Tenant origination and absorption cost $ 23,756 $ 16,264 $ 7,145
Schedule of amortization (income) expense, future amortization	The following table sets forth the estimated annual amortization (income) expense for in-place lease valuation, and tenant origination and absorption costs as of December 31, 2017 for the next five years: Year In-Place Lease Valuation Tenant Origination and Absorption Costs 2018 $ (4,695 ) $ 24,198 2019 $ (4,695 ) $ 24,198 2020 $ (4,695 ) $ 24,198 2021 $ (3,799 ) $ 19,715 2022 $ (3,799 ) $ 19,597
Below market lease, future amortization	The following table sets forth the estimated annual amortization (income) expense for in-place lease valuation, and tenant origination and absorption costs as of December 31, 2017 for the next five years: Year In-Place Lease Valuation Tenant Origination and Absorption Costs 2018 $ (4,695 ) $ 24,198 2019 $ (4,695 ) $ 24,198 2020 $ (4,695 ) $ 24,198 2021 $ (3,799 ) $ 19,715 2022 $ (3,799 ) $ 19,597

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Schedule of Debt	As of December 31, 2017 and 2016 , the Company's debt and related deferred financing costs consisted of the following: December 31, 2017 December 31, 2016 Contractual Interest Rate (1) Payment Type Loan Maturity Effective Interest Rate (4) Revolving Credit Facility $ 357,758 $ 333,458 2.87% Interest Only December 2019 (2) 3.32% AIG Loan 126,970 126,970 4.15% Interest Only (3) November 2025 4.22% Total Debt 484,728 460,428 Unamortized deferred financing costs (2,880 ) (3,956 ) Total Debt, net $ 481,848 $ 456,472 (1) The 2.87% contractual interest rate is based on a 360 -day year, pursuant to the Revolving Credit Facility. The 2.92% weighted-average interest rate is based on a 365 -day year. As discussed below, the interest rate on the Revolving Credit Facility (as defined below) is a one-month LIBO Rate + 1.50% . As of December 31, 2017 , the LIBO Rate was 1.57% . Including the effect of interest rate swap agreements with a total notional amount of $200.0 million , the weighted average interest rate as of December 31, 2017 was approximately 3.13% for the Company's fixed-rate and variable-rate debt combined. (2) The Revolving Credit Facility has an initial term of four years, maturing on December 12, 2018, and may be extended for a one -year period if certain conditions are met and upon payment of an extension fee. See discussion below. (3) The AIG Loan (as defined below) requires monthly payments of interest only, at a fixed rate, for the first five years and fixed monthly payments of principal and interest thereafter. (4) Reflects the effective interest rate at December 31, 2017 and includes the effect of amortization of deferred financing costs.
Schedule of Maturities of Long-term Debt	The following summarizes the future principal repayments of all loans as of December 31, 2017 per the loan terms discussed above: December 31, 2017 2018 $ — 2019 357,758 2020 — 2021 2,178 2022 2,271 Thereafter 122,521 Total principal 484,728 Unamortized deferred loan costs (2,880 ) Total $ 481,848

Interest Rate Contracts (Tables

Interest Rate Contracts (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Interest Rate Swaps	The following table sets forth a summary of the interest rate swaps at December 31, 2017 and December 31, 2016 : Fair Value (1) Current Effective Notional Amount (2) Derivative Instrument Effective Date Maturity Date Interest Strike Rate December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 Assets Interest Rate Swap 4/1/2016 12/12/2018 0.74% $ 967 $ 996 $ 100,000 $ 100,000 Interest Rate Swap (3) 11/1/2017 7/1/2018 1.50% 65 — 100,000 — Total $ 1,032 $ 996 $ 200,000 $ 100,000 (1) The Company records all derivative instruments on a gross basis on the consolidated balance sheets, and accordingly, there are no offsetting amounts that net assets against liabilities. As of December 31, 2017 , the Company's derivatives were in asset positions, and as such, the fair value is included in the line item "Other Assets, net" on the consolidated balance sheet. (2) Represents the notional amount of swap that was effective as of the balance sheet date of December 31, 2017 and December 31, 2016 . (3) Effective as of November 1, 2017, Griffin Capital Essential Asset Operating Partnership, L.P, an affiliated party novated a $100 million interest rate swap agreement with an expiration date of June 1, 2018 to the Company's Operating Partnership. The Company paid approximately nine thousand dollars, which approximated fair value.
Impact of Interest Rate Swap Agreements on Consolidated Financial Statements	The following table sets forth the impact of the interest rate swaps on the consolidated financial statements for the periods presented: Year Ended December 31, 2017 2016 Interest Rate Swaps in Cash Flow Hedging Relationship: Amount of loss recognized in AOCI on derivative (effective portion) $ 428 $ 662 Amount of (gain) loss reclassified from AOCI into earnings under “Interest expense” (effective portion) $ (319 ) $ 179 Amount of (loss) gain recognized in earnings under “Interest expense” (ineffective portion and amount excluded from effectiveness testing) $ (80 ) $ 155

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value	The following tables set forth the assets/(liabilities) that the Company measures at fair value on a recurring basis by level within the fair value hierarchy as of December 31, 2017 and 2016 : Total Fair Value Quoted Prices in Active Markets for Identical Assets and Liabilities Significant Other Observable Inputs Significant Unobservable Inputs Interest Rate Swaps at: December 31, 2017 $ 1,032 $ — $ 1,032 $ — December 31, 2016 $ 996 $ — $ 996 $ —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	December 31, 2017 December 31, 2016 Fair Value Carrying Value (1) Fair Value Carrying Value (1) AIG Loan $ 122,928 $ 126,970 $ 120,322 $ 126,970 (1) The carrying value of the AIG Loan does not include deferred financing costs as of December 31, 2017 and 2016 . See Note 4, Debt , for details.

Accrued Expenses and Other Li29

Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities consisted of the following as of December 31, 2017 and 2016 : December 31, 2017 December 31, 2016 Prepaid rent $ 4,304 $ 9,484 Leasing commission payable 3,783 3,783 Accrued property taxes 3,490 2,678 Interest expense payable 3,013 1,716 Other liabilities 5,313 3,866 Total $ 19,903 $ 21,527

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Shares Issued and Gross Proceeds for Each Share Class	The following table summarizes shares issued and gross proceeds received for each share class as of December 31, 2017 and outstanding shares as of December 31, 2017 and 2016 : Class T S D I A AA AAA Total Gross proceeds from primary portion of offerings $ 41 $ 3 $ 3 $ 2,493 $ 240,780 $ 474,858 $ 8,379 $ 726,557 Gross proceeds from DRP $ — $ — $ — $ 41 $ 19,773 $ 21,828 $ 312 $ 41,954 Shares issued in primary portion of offerings 4,144 264 264 263,200 24,199,760 47,562,870 901,225 72,931,727 DRP shares issued 4 4 4 4,276 2,089,748 2,313,170 33,308 4,440,514 Stock distribution shares issued — — — — 263,641 300,166 4,676 568,483 Restricted stock units issued — — — — — — 25,500 25,500 Total redemptions — — — — (557,206 ) (233,735 ) — (790,941 ) Total shares outstanding as of 12/31/2017 4,148 268 268 267,476 25,995,943 49,942,471 964,709 77,175,283 Total shares outstanding as of 12/31/2016 — — — — 25,562,982 44,595,631 781,034 70,939,647
Organizational and Offering Costs Incurred	Organizational and offering costs incurred as of December 31, 2017 , including those incurred by the Company and due to the Advisor, for the Follow-On Offering are as follows: December 31, 2017 Cumulative offering costs $ 1,698 Cumulative organizational costs $ 359 Organizational and offering costs advanced by the Advisor $ 1,226 Organizational and offering costs paid by the Company 831 Adjustment to organizational and offering costs pursuant to the limitation: Reduction in due to affiliates (999 ) Due from affiliates (677 ) Net due to Advisor $ 381
Schedule of Stock Redemption Activity	During the years ended ended December 31, 2017 and 2016 , the Company redeemed shares of its outstanding common stock as follows: Year Ended December 31, Period 2017 2016 Shares of common stock redeemed 623,499 167,442 Weighted average price per share $ 9.21 $ 9.72
Share redemption price	The redemption price per IPO Share is expected to be the redemption rate set forth in the following table which is based upon the number of years the stock is held: Number Years Held Redemption Price per Share Less than 1 year No Redemption Allowed After one year from the purchase date 90.0% of the Redemption Amount (as defined below) After two years from the purchase date 95.0% of the Redemption Amount After three years from the purchase date 97.5% of the Redemption Amount After four years from the purchase date 100.0% of the Redemption Amount
Schedule of Distributions Paid	The following unaudited table summarizes the federal income tax treatment for all distributions per share for the years ended December 31, 2017 , 2016 and 2015 reported for federal tax purposes and serves as a designation of capital gain distributions, if applicable, pursuant to Section 857(b)(3)(c) of the Code and Treasury Regulation § 1.857-6(e). Year Ended December 31, 2017 2016 2015 Ordinary income $ 0.04 7.90 % $ 0.31 57.10 % $ 0.21 38.60 % Return of capital 0.51 92.10 % 0.24 42.90 % 0.34 61.40 % Total distributions paid $ 0.55 100.00 % $ 0.55 100.00 % $ 0.55 100.00 %

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2017
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interest	The following summarizes the activity for noncontrolling interests for the years ended December 31, 2017 , 2016 and 2015 : Year Ended December 31, 2017 2016 2015 Beginning balance $ 84 $ 98 $ 139 Distributions to noncontrolling interests (11 ) (11 ) (11 ) Net income (loss) 3 (3 ) (30 ) Ending balance $ 76 $ 84 $ 98

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Summarized below are the related-party costs incurred by the Company for the years ended December 31, 2017 , 2016 and 2015 , respectively, and any related amounts payable as of December 31, 2017 and 2016 : Incurred as of December 31, Payable as of December 31, 2017 2016 2015 2017 2016 Expensed Acquisition fees and expenses $ — $ 6,324 $ 11,438 $ — $ — Operating expenses 2,336 1,622 1,911 658 18 Asset management fees 8,027 6,413 2,624 — 807 Property management fees 1,799 1,052 333 158 143 Performance distributions 2,394 — — 2,394 — Advisory Fees 2,550 — — 762 — Capitalized/Offering Acquisition fees and expenses (1) 1,099 7,606 — — — Organization and offering expense 192 — 3,150 192 — Other costs advanced by the Advisor 662 304 2,598 285 12 Preferred offering costs (2) — — 375 — — Selling commissions (3) 1,128 11,397 16,303 — 54 Dealer Manager fees (4) 393 3,949 7,303 — 18 Stockholder servicing fee 660 17,449 25 12,377 16,020 Advisor Advances: (5) Organization and offering expenses 179 2,634 382 8 2,477 Dealer Manager fees 853 8,069 765 62 2,932 Total $ 22,272 $ 66,819 $ 47,207 $ 16,896 $ 22,481 (1) Effective September 20, 2017, the Advisor is not entitled to acquisition fees, disposition fees or financing fees; provided, however, that the Advisor will receive the compensation set forth in the Original Advisory Agreement for the Company’s investment in an approximately 1,000,000 square foot property located at 39000 Amrheim Road, Livonia, Michigan 48150 with a total transaction price of approximately $80 million . (2) The Company recognized a redemption premium on preferred units issued to an affiliate of approximately $0.4 million , which represented a write-off of original issuance costs. (3) On September 18, 2017, the Company and the Dealer Manager entered into a dealer manager agreement for the Follow-On Offering. See the "Dealer Manager Agreement" section below for details regarding selling commissions and dealer manager fees. (4) The Dealer Manager continues to receive a stockholder servicing fee with respect to Class AA shares as detailed in the Company's IPO prospectus. The stockholder servicing fee is paid quarterly and accrues daily in an amount equal to 1/365th of 1% of the NAV per share of the Class AA shares, up to an aggregate of 4% of the gross proceeds of Class AA shares sold. The Company will cease paying the stockholder servicing fee with respect to the Class AA shares at the earlier of (i) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of shares in the Company's IPO (excluding proceeds from sales pursuant to the related DRP); (ii) the fourth anniversary of the last day of the fiscal quarter in which the Company's IPO terminated; (iii) the date that such Class AA share is redeemed or is no longer outstanding; and (iv) the occurrence of a merger, listing on a national securities exchange, or an extraordinary transaction. (5) Pursuant to the Original Advisory Agreement, commencing November 2, 2015, the Company remained obligated to reimburse the Advisor for organizational and offering costs incurred after such date. Terms of the organizational and offering costs are included in the Company's 2016 Annual Report on Form 10-K filed on March 15, 2017.

Selected Quarterly Financial 33

Selected Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2017 and 2016 : 2017 First Quarter Second Quarter Third Quarter Fourth Quarter Total revenue $ 25,972 $ 26,546 $ 27,349 $ 27,514 Net income $ 3,124 $ 3,365 $ 3,099 $ 1,531 Net income attributable to common stockholders $ 3,123 $ 3,364 $ 3,098 $ 1,531 Net income per share (1) $ 0.04 $ 0.04 $ 0.04 $ 0.03 2016 First Quarter Second Quarter Third Quarter Fourth Quarter Total revenue $ 12,502 $ 13,330 $ 16,334 $ 20,646 Net (loss)/income $ (1,141 ) $ (2,825 ) $ (2,736 ) $ 595 Net (loss)/income attributable to common stockholders $ (1,140 ) $ (2,824 ) $ (2,735 ) $ 595 Net (loss)/income per share (1) $ (0.03 ) $ (0.06 ) $ (0.05 ) $ 0.01 (1) Amounts were retroactively adjusted to reflect stock dividends. (See Note 2, Basis of Presentation and Summary of Significant Accounting Policies, for additional detail).

Organization - Narrative (Detai

Organization - Narrative (Details) - USD ($)	Sep. 20, 2017	Apr. 06, 2017	Dec. 31, 2017	Dec. 31, 2016	Jul. 31, 2014	Feb. 11, 2014
Subsidiary, Sale of Stock [Line Items]
Limited liability partnership percentage of interest held (percent)						99.00%
Limited partnership, purchase price						$ 200,000
Initial capital contribution						$ 1,000
General partner percentage interest obtained (percent)						1.00%
Offering amount in sales of shares					$ 2,200,000,000
Shares of stock authorized (shares)			1,000,000,000
Common stock, number of shares authorized (in shares)			800,000,000	700,000,000
Common stock, par value (in USD per share)			$ 0.001	$ 0.001
Preferred stock, number of shares authorized (in shares)			200,000,000
Preferred stock, par value (in USD per share)			$ 0.001
IPO
Subsidiary, Sale of Stock [Line Items]
Offering amount in sales of shares					2,000,000,000
Follow-on Offering
Subsidiary, Sale of Stock [Line Items]
Offering amount in sales of shares	$ 2,200,000,000
Primary Offering
Subsidiary, Sale of Stock [Line Items]
Offering amount in sales of shares	2,000,000,000
Distribution Reinvestment Plan
Subsidiary, Sale of Stock [Line Items]
Common stock of the Company pursuant to the distribution reinvestment plan (shares)	$ 200,000,000				$ 200,000,000
Number of shares filed on Registration Statement (shares)		3,000,000
Equity offering termination notice, period		10 days
Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			800,000,000
Class T
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			150,000,000
Class S
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			150,000,000
Class D
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			150,000,000
Class I
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			150,000,000
Class A
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			70,000,000
Class AA
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			120,000,000
Class AAA
Subsidiary, Sale of Stock [Line Items]
Common stock, number of shares authorized (in shares)			10,000,000
Affiliated Entity
Subsidiary, Sale of Stock [Line Items]
New shares purchased by affiliate (shares)	263,992
Purchase of new share by affiliated entity	$ 2,500,000

Basis of Presentation and Sum35

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2017USD ($)segment	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Cash equivalents	$ 0	$ 0
Amount insured by FDIC	250,000
Restricted cash	12,886,000	$ 14,221,000
Asset impairment charge	$ 0
Number of reportable segments | segment	1

Basis of Presentation and Sum36

Basis of Presentation and Summary of Significant Accounting Policies - Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2017
Building
Property, Plant and Equipment [Line Items]
Estimated life of assets	40 years
Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated life of assets	5 years
Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated life of assets	20 years
Land Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated life of assets	15 years
Land Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated life of assets	25 years

Real Estate - Narrative (Detail

Real Estate - Narrative (Details)	Jul. 31, 2017USD ($)	Nov. 02, 2015	Dec. 31, 2017USD ($)ft²statePropertybuilding	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Real Estate [Line Items]
Number of properties (property) | Property			27
Number of buildings | building			35
Number of states | state			17
Combined acquisition value			$ 1,100,000,000
Area of real estate property (sq ft) | ft²			7,300,000
Depreciation of building and improvements			$ 20,194,000	$ 11,630,000	$ 4,916,000
Amortization			$ 23,800,000
Advisory fee, base rate (percent)		2.00%	2.00%
Acquisition fee and expense reimbursement as percent of acquisition value (percent)			1.00%
Advisor acquisition fee for property (percent)		3.85%
Contingent advisory fee (percentage)		1.85%
Amount retained subject to conditions			$ 5,000,000
Weighted average amortization period			10 years 3 months 18 days	11 years 4 months 24 days
Minimum
Real Estate [Line Items]
Discount rate (percent)			5.75%
Maximum
Real Estate [Line Items]
Discount rate (percent)			8.25%
The Allstate Property
Real Estate [Line Items]
Area of real estate property (sq ft) | ft²			70,300
Aggregate purchase price of acquired properties			$ 14,800,000
Credit applied at closing			402,000
Acquisition costs			$ 1,200,000
Contingent Advisor Payment Holdback - Organization and Offering Expenses and Dealer Manager Fees [Member]
Real Estate [Line Items]
Contingent Advisor Payment Holdback	$ 5,000,000

Real Estate - Real Estate Portf

Real Estate - Real Estate Portfolio (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)ft²	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Real Estate Properties [Line Items]
Purchase Price	$ 45,016	$ 615,972	$ 516,965
Approx. Square Feet (sq ft) | ft²	7,300,000
The Allstate Property
Real Estate Properties [Line Items]
Purchase Price	$ 14,750
Approx. Square Feet (sq ft) | ft²	70,300
Acquisition Fees and Reimbursable Expenses Paid to the Advisor	$ 402
Contingent Advisor Payment	273
MISO Property
Real Estate Properties [Line Items]
Purchase Price	$ 28,600
Approx. Square Feet (sq ft) | ft²	133,400
Acquisition Fees and Reimbursable Expenses Paid to the Advisor	$ 696
Contingent Advisor Payment	$ 529

Real Estate - Purchase Price Al

Real Estate - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Summary of purchase price allocation
Land	$ 122,482	$ 117,569
Building and Improvements	815,721	787,999
Tenant Origination and Absorption Cost	240,364	227,407
In-Place Lease Valuation Above Market	4,046	$ 3,828
The Allstate Property
Summary of purchase price allocation
Land	1,808
Building and Improvements	9,071
Tenant Origination and Absorption Cost	5,019
In-Place Lease Valuation Above Market	0
In-Place Lease Valuation (Below) Market	1,001
Total	14,897
MISO Property
Summary of purchase price allocation
Land	3,104
Building and Improvements	18,077
Tenant Origination and Absorption Cost	7,937
In-Place Lease Valuation Above Market	218
In-Place Lease Valuation (Below) Market	0
Total	$ 29,336

Real Estate - Future Minimum Co

Real Estate - Future Minimum Contractual Rent Payments (Details) $ in Thousands	Dec. 31, 2017USD ($)
Schedule of future minimum net rent payments
2,018	$ 71,662
2,019	78,887
2,020	80,492
2,021	72,677
2,022	73,538
Thereafter	528,803
Total	$ 906,059

Real Estate - In-Place Lease Va

Real Estate - In-Place Lease Valuation and Tenant Origination and Absorption Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
In-Place Lease Valuation Above Market	$ 4,046	$ 3,828
In Place Lease Valuation Above Market Accumulated Amortization	752	300
Above market leases, net	3,294	3,528
Below Market Lease, Net [Abstract]
Below Market Lease, Gross	62,070	61,069
Below Market Lease, Accumulated Amortization	10,775	5,750
Below Market Lease, Net	51,295	55,319
Tenant Origination and Absorption Cost
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	240,364	227,407
Finite-Lived Intangible Assets, Accumulated Amortization	47,165	23,409
Finite-Lived Intangible Assets, Net	$ 193,199	$ 203,998

Real Estate - Amortization of I

Real Estate - Amortization of Intangible Assets and Other Leasing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of amortization expense
Amortization of above and below market leases	$ (4,573)	$ (3,592)	$ (1,858)
Tenant origination and absorption cost	$ 23,756	$ 16,264	$ 7,145

Real Estate - Estimated Annual

Real Estate - Estimated Annual Amortization (Income) Expense for In-Place Lease (Details) $ in Thousands	Dec. 31, 2017USD ($)
Below Market Lease, Amortization Income, Maturity Schedule [Abstract]
2,018	$ (4,695)
2,019	(4,695)
2,020	(4,695)
2,021	(3,799)
2,022	(3,799)
Tenant Origination and Absorption Cost
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	24,198
2,019	24,198
2,020	24,198
2,021	19,715
2,022	$ 19,597

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Oct. 22, 2015
Debt Instrument [Line Items]
Total debt, gross	$ 484,728	$ 460,428
Unamortized deferred financing costs	(2,880)	(3,956)
Total debt	481,848	456,472
Credit facility | Revolving Credit Facility
Debt Instrument [Line Items]
Total debt, gross	$ 357,758	333,458
Contractual interest rate (percent)	2.87%
Effective interest rate (percent)	3.32%
Loan | AIG Loan
Debt Instrument [Line Items]
Total debt, gross	$ 126,970	$ 126,970
Total debt			$ 127,000
Contractual interest rate (percent)	4.15%
Effective interest rate (percent)	4.22%

Debt - Narrative (Details)

Debt - Narrative (Details)	Oct. 22, 2015USD ($)entity	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Nov. 22, 2016USD ($)	Feb. 25, 2016USD ($)	Aug. 11, 2015USD ($)	Dec. 12, 2014USD ($)
Debt Instrument [Line Items]
Weighted average interest rate (percent)		3.13%
Number of wholly owned SPE | entity	6
Long-term debt		$ 481,848,000	$ 456,472,000
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Base rate		1.57%
Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity				$ 550,000,000		$ 410,000,000	$ 250,000,000
Revolving credit facility, maximum borrowing capacity							$ 1,250,000,000
Remaining borrowing capacity		$ 143,100,000
Revolving Credit Facility | Credit facility
Debt Instrument [Line Items]
Contractual interest rate (percent)		2.87%
Weighted average interest rate (percent)		2.92%
Term of loan		4 years	4 years
Revolving credit facility, extension term		1 year	1 year
Revolving Credit Facility | Credit facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Term to determine contractual rate		360 days
Term to determine weighted average interest rate		365 days
Basis spread on variable rate (percent)		1.50%
AIG Loan | Loan
Debt Instrument [Line Items]
Contractual interest rate (percent)		4.15%
Term of loan		10 years
Period subject to fixed interest rate		5 years
Long-term debt	$ 127,000,000
Amounts outstanding		$ 127,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Notional amount		$ 200,000,000			$ 100,000,000

Debt - Schedule of Debt Maturit

Debt - Schedule of Debt Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
2,018	$ 0
2,019	357,758
2,020	0
2,021	2,178
2,022	2,271
Thereafter	122,521
Total principal	484,728	$ 460,428
Unamortized deferred loan costs	(2,880)	(3,956)
Total debt	$ 481,848	$ 456,472

Interest Rate Contracts - Summa

Interest Rate Contracts - Summary of Interest Rate Swap (Details) - USD ($)	Dec. 31, 2017	Nov. 01, 2017	Dec. 31, 2016	Feb. 25, 2016
Derivative [Line Items]
Derivative asset	$ 1,032,000		$ 996,000
Current effective notional amount	200,000,000		100,000,000
Interest Rate Swap
Derivative [Line Items]
Derivative asset	967,000		996,000
Notional amount	200,000,000			$ 100,000,000
Current effective notional amount	$ 100,000,000		100,000,000
Level 2 | Interest Rate Swap
Derivative [Line Items]
Interest rate (percent)	0.74%
Recurring | Interest Rate Swap
Derivative [Line Items]
Derivative asset	$ 1,032,000		996,000
Recurring | Level 2 | Interest Rate Swap
Derivative [Line Items]
Derivative asset	1,032,000		996,000
Griffin Capital Essential Asset Operating Partnership, L.P. | Interest Rate Swap
Derivative [Line Items]
Derivative asset	65,000		0
Current effective notional amount	$ 100,000,000		$ 0
Griffin Capital Essential Asset Operating Partnership, L.P. | Level 2 | Interest Rate Swap
Derivative [Line Items]
Interest rate (percent)	1.50%
Griffin Capital Essential Asset Operating Partnership, L.P. | Recurring | Level 2 | Interest Rate Swap
Derivative [Line Items]
Current effective notional amount		$ 100,000,000
Approximate fair value of swap		$ 9,000

Interest Rate Contracts - Effec

Interest Rate Contracts - Effect of Interest Rate Swaps (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Additional amounts to be recognized from AOCI	$ (1,000,000)
Derivative asset	1,032,000	$ 996,000
Interest Rate Swap
Derivative [Line Items]
Derivative asset	967,000	996,000
Fair value of collateral	0
Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Amount of loss recognized in AOCI on derivative (effective portion)	428,000	662,000
Amount of (gain) loss reclassified from AOCI into earnings under “Interest expense” (effective portion)	(319,000)	179,000
Amount of (loss) gain recognized in earnings under “Interest expense” (ineffective portion and amount excluded from effectiveness testing)	$ (80,000)	$ 155,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets (Liabilities) Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	$ 1,032	$ 996
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	967	996
Recurring | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	1,032	996
Recurring | Interest Rate Swap | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Recurring | Interest Rate Swap | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	1,032	996
Recurring | Interest Rate Swap | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	$ 0	$ 0

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Mortgage Loan (Details) - Loan - AIG Loan - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AIG loan	$ 127,000
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AIG loan	122,928	$ 120,322
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AIG loan	$ 126,970	$ 126,970

Accrued Expenses and Other Li51

Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Prepaid rent	$ 4,304	$ 9,484
Leasing commission payable	3,783	3,783
Accrued property taxes	3,490	2,678
Interest expense payable	3,013	1,716
Other liabilities	5,313	3,866
Total	$ 19,903	$ 21,527

Equity - Narrative (Details)

Equity - Narrative (Details)	Jun. 14, 2017shares	Apr. 06, 2017shares	Mar. 31, 2017shares	Dec. 31, 2017USD ($)vote$ / sharesshares	Dec. 31, 2016USD ($)vote$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Sep. 20, 2017USD ($)	Jul. 31, 2014USD ($)
Class of Stock [Line Items]
Offering amount in sales of shares								$ 2,200,000,000
Number of votes entitled per share | vote				1
Percent of organizational and offering costs limit (percent)				15.00%
Days required for reimbursement of excess amounts				60 days
Organizational costs as a percentage of gross offering proceeds				81.00%
Shares of common stock redeemed (shares) | shares				790,941
Common stock subject to redemption				$ 32,405,000	$ 16,930,000	$ 32,405,000
Fair value assumptions, expected term				10 years
Percentage of outstanding stock maximum				10.00%
Number of shares authorized (shares) | shares				10,000,000		10,000,000
Number of shares available for grant (shares) | shares				7,717,528		7,717,528
IPO
Class of Stock [Line Items]
Offering amount in sales of shares								2,000,000,000
Distribution Reinvestment Plan
Class of Stock [Line Items]
Number of shares filed on Registration Statement (shares) | shares		3,000,000
Equity offering termination notice, period		10 days
Common stock of the Company pursuant to the distribution reinvestment plan (shares)							$ 200,000,000	$ 200,000,000
Value of shares tendered for redemption				$ 2,200,000		$ 2,200,000
Follow-on Offering
Class of Stock [Line Items]
Offering amount in sales of shares							2,200,000,000
Primary Offering
Class of Stock [Line Items]
Offering amount in sales of shares							$ 2,000,000,000
Common Stock Subject to Mandatory Redemption
Class of Stock [Line Items]
Common stock subject to redemption				$ 32,400,000		$ 32,400,000
Class A
Class of Stock [Line Items]
Shares of common stock redeemed (shares) | shares				557,206
Class T
Class of Stock [Line Items]
Number of votes | vote					1
Shares of common stock redeemed (shares) | shares				0
Class I
Class of Stock [Line Items]
Shares of common stock redeemed (shares) | shares				0
Share Redemption Program
Class of Stock [Line Items]
Minimum holding period for redemption of stock				1 year
Redemption, percentage of weighted average shares outstanding				5.00%
Redemption price, percentage of net asset value of shares				100.00%		100.00%
Shares of common stock redeemed (shares) | shares				623,499	167,442	790,941
Stock redeemed or called during period				$ 5,700,000	$ 1,600,000	$ 7,400,000
Weighted average price per share (in usd per share) | $ / shares				$ 9.21	$ 9.72	$ 9.32
Minimum redemption percentage					25.00%
Minimum ownership balance				$ 2,500		$ 2,500
Share Redemption Program | IPO
Class of Stock [Line Items]
Minimum holding period for redemption of stock				4 years
New Share Redemption Program
Class of Stock [Line Items]
Minimum holding period for redemption of stock				1 year
Quarterly cap, percentage of net asset value of outstanding shares				5.00%
Quarterly cap				$ 0		0
New Share Redemption Program | IPO
Class of Stock [Line Items]
Minimum holding period for redemption of stock				4 years
Restricted Stock | Director
Class of Stock [Line Items]
Grants in period (shares) | shares	7,000		15,000	36,000
Organizational and Offering Costs Incurred | IPO
Class of Stock [Line Items]
Due from related parties				$ 76,000,000		76,000,000
Organization and offering expense
Class of Stock [Line Items]
Due from related parties				100,000	$ 5,400,000	100,000
Pro Forma | Organization and offering expense
Class of Stock [Line Items]
Due from related parties				1,700,000		1,700,000
Due to Affiliates | Organization and offering expense
Class of Stock [Line Items]
Due from related parties				1,000,000		1,000,000
Other Assets | Organization and offering expense
Class of Stock [Line Items]
Due from related parties				$ 700,000		$ 700,000

Equity - Schedule of Shares Iss

Equity - Schedule of Shares Issued and Gross Proceeds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Total redemptions (shares)	(790,941)
Total shares outstanding (shares)	77,175,283	70,939,647
Class T
Class of Stock [Line Items]
Total redemptions (shares)	0
Total shares outstanding (shares)	4,148	0
Class S
Class of Stock [Line Items]
Total redemptions (shares)	0
Total shares outstanding (shares)	268	0
Class D
Class of Stock [Line Items]
Total redemptions (shares)	0
Total shares outstanding (shares)	268	0
Class I
Class of Stock [Line Items]
Total redemptions (shares)	0
Total shares outstanding (shares)	267,476	0
Class A
Class of Stock [Line Items]
Total redemptions (shares)	(557,206)
Total shares outstanding (shares)	25,995,943	25,562,982
Class AA
Class of Stock [Line Items]
Total redemptions (shares)	(233,735)
Total shares outstanding (shares)	49,942,471	44,595,631
Class AAA
Class of Stock [Line Items]
Total redemptions (shares)	0
Total shares outstanding (shares)	964,709	781,034
IPO
Class of Stock [Line Items]
Gross proceeds	$ 726,557
Total shares issued prior to redemptions (shares)	72,931,727
IPO | Class T
Class of Stock [Line Items]
Gross proceeds	$ 41
Total shares issued prior to redemptions (shares)	4,144
IPO | Class S
Class of Stock [Line Items]
Gross proceeds	$ 3
Total shares issued prior to redemptions (shares)	264
IPO | Class D
Class of Stock [Line Items]
Gross proceeds	$ 3
Total shares issued prior to redemptions (shares)	264
IPO | Class I
Class of Stock [Line Items]
Gross proceeds	$ 2,493
Total shares issued prior to redemptions (shares)	263,200
IPO | Class A
Class of Stock [Line Items]
Gross proceeds	$ 240,780
Total shares issued prior to redemptions (shares)	24,199,760
IPO | Class AA
Class of Stock [Line Items]
Gross proceeds	$ 474,858
Total shares issued prior to redemptions (shares)	47,562,870
IPO | Class AAA
Class of Stock [Line Items]
Gross proceeds	$ 8,379
Total shares issued prior to redemptions (shares)	901,225
Distribution Reinvestment Plan
Class of Stock [Line Items]
Gross proceeds	$ 41,954
Total shares issued prior to redemptions (shares)	4,440,514
Distribution Reinvestment Plan | Class T
Class of Stock [Line Items]
Gross proceeds	$ 0
Total shares issued prior to redemptions (shares)	4
Distribution Reinvestment Plan | Class S
Class of Stock [Line Items]
Gross proceeds	$ 0
Total shares issued prior to redemptions (shares)	4
Distribution Reinvestment Plan | Class D
Class of Stock [Line Items]
Gross proceeds	$ 0
Total shares issued prior to redemptions (shares)	4
Distribution Reinvestment Plan | Class I
Class of Stock [Line Items]
Gross proceeds	$ 41
Total shares issued prior to redemptions (shares)	4,276
Distribution Reinvestment Plan | Class A
Class of Stock [Line Items]
Gross proceeds	$ 19,773
Total shares issued prior to redemptions (shares)	2,089,748
Distribution Reinvestment Plan | Class AA
Class of Stock [Line Items]
Gross proceeds	$ 21,828
Total shares issued prior to redemptions (shares)	2,313,170
Distribution Reinvestment Plan | Class AAA
Class of Stock [Line Items]
Gross proceeds	$ 312
Total shares issued prior to redemptions (shares)	33,308
Share Distribution
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	568,483
Share Distribution | Class T
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Share Distribution | Class S
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Share Distribution | Class D
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Share Distribution | Class I
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Share Distribution | Class A
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	263,641
Share Distribution | Class AA
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	300,166
Share Distribution | Class AAA
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	4,676
Restricted Stock Issuance
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	25,500
Restricted Stock Issuance | Class T
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class S
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class D
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class I
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class A
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class AA
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	0
Restricted Stock Issuance | Class AAA
Class of Stock [Line Items]
Total shares issued prior to redemptions (shares)	25,500

Equity - Organization and Offer

Equity - Organization and Offering Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Due from affiliates	$ (686)	$ 0
Organization and offering expense
Class of Stock [Line Items]
Cumulative offering costs	1,698
Cumulative organizational costs	359
Organizational and offering costs advanced by the Advisor	1,226
Organizational and offering costs paid by the Company	831
Reduction in due to affiliates	(999)
Due from affiliates	(677)
Net due to Advisor	$ 381

Equity - Stock Redemption Activ

Equity - Stock Redemption Activity (Details) - $ / shares	12 Months Ended		24 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017
Class of Stock [Line Items]
Shares of common stock redeemed (shares)	790,941
Share Redemption Program
Class of Stock [Line Items]
Shares of common stock redeemed (shares)	623,499	167,442	790,941
Weighted average price per share (in usd per share)	$ 9.21	$ 9.72	$ 9.32

Equity - Redemption Price per I

Equity - Redemption Price per IPO Share (Details)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Redemption price per share within 1 year (percent)	0.00%
Redemption price per share year 1 (percent)	90.00%
Redemption price per share year 2 (percent)	95.00%
Redemption price per share year 3 (percent)	97.50%
Redemption price per share year 4 and after (percent)	100.00%

Equity - Income Tax Treatment o

Equity - Income Tax Treatment of Distributions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Ordinary income (in usd per share)	$ 0.04	$ 0.31	$ 0.21
Ordinary income (percent)	7.90%	57.10%	38.60%
Return of capital (in usd per share)	$ 0.51	$ 0.24	$ 0.34
Return of capital (percent)	92.10%	42.90%	61.40%
Total distributions paid (in usd per share)	$ 0.55	$ 0.55	$ 0.55
Total distributions paid (percent)	100.00%	100.00%	100.00%

Noncontrolling Interests - Narr

Noncontrolling Interests - Narrative (Details) - Operating Partnership - $ / shares	12 Months Ended
	Dec. 31, 2017	Feb. 11, 2014
Noncontrolling Interest [Line Items]
Percentage of ownership interests acquired in acquisitions in which noncontrolling interest is recognized - less than	0.03%
Limited Partner
Noncontrolling Interest [Line Items]
Limited partnership units issued (in shares)		20,000
Price per partnership unit (in USD per share)		$ 10
Partnership unit exchange (in shares)	1

Noncontrolling Interests - Sche

Noncontrolling Interests - Schedule of Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 84
Distributions to noncontrolling interest	(11)	$ (11)
Net income (loss)	11,119	(6,107)	$ (17,277)
Ending balance	76	84
Non- controlling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	84	98	139
Distributions to noncontrolling interest	(11)	(11)	(11)
Net income (loss)	3	(3)	(30)
Ending balance	$ 76	$ 84	$ 98

Related Party Transactions - Sc

Related Party Transactions - Schedule of Transactions (Details) $ in Thousands, ft² in Millions	12 Months Ended
	Dec. 31, 2017USD ($)ft²	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 20, 2017USD ($)ft²
Due to Related Parties [Roll Forward]
Incurred	$ 22,272	$ 66,819	$ 47,207
Payable at end of period	$ 16,896	22,481
Area of real estate property (sq ft) | ft²	7.3
Total real estate	$ 1,178,866	1,133,055
Underwriting compensation, percent of gross proceeds	9.00%
Class T
Due to Related Parties [Roll Forward]
Daily accrual rate of shares sold	0.00274%
Acquisition fees and expenses
Due to Related Parties [Roll Forward]
Incurred	$ 0	6,324	11,438
Payable at end of period	0	0
Area of real estate property (sq ft) | ft²				1
Total real estate				$ 80,000
Operating expenses
Due to Related Parties [Roll Forward]
Incurred	2,336	1,622	1,911
Payable at end of period	658	18
Asset management fees
Due to Related Parties [Roll Forward]
Incurred	8,027	6,413	2,624
Payable at end of period	0	807
Property management fees
Due to Related Parties [Roll Forward]
Incurred	1,799	1,052	333
Payable at end of period	158	143
Performance distributions
Due to Related Parties [Roll Forward]
Incurred	2,394	0	0
Payable at end of period	2,394	0
Advisory Fees
Due to Related Parties [Roll Forward]
Incurred	2,550	0	0
Payable at end of period	762	0
Acquisition fees and expenses
Due to Related Parties [Roll Forward]
Incurred	1,099	7,606	0
Payable at end of period	0	0
Organization and offering expense
Due to Related Parties [Roll Forward]
Incurred	192	0	3,150
Payable at end of period	192	0
Other costs advanced by the Advisor
Due to Related Parties [Roll Forward]
Incurred	662	304	2,598
Payable at end of period	285	12
Preferred offering costs
Due to Related Parties [Roll Forward]
Incurred	0	0	375
Payable at end of period	0	0
Selling commissions
Due to Related Parties [Roll Forward]
Incurred	1,128	11,397	16,303
Payable at end of period	0	54
Dealer Manager fees
Due to Related Parties [Roll Forward]
Incurred	393	3,949	7,303
Payable at end of period	0	18
Stockholder servicing fee payable
Due to Related Parties [Roll Forward]
Incurred	660	17,449	25
Payable at end of period	12,377	16,020
Organization and offering expenses
Due to Related Parties [Roll Forward]
Incurred	179	2,634	382
Payable at end of period	8	2,477
Dealer Manager fees
Due to Related Parties [Roll Forward]
Incurred	853	8,069	$ 765
Payable at end of period	$ 62	$ 2,932
Dealer Manager Agreement
Due to Related Parties [Roll Forward]
Underwriting compensation, percent of gross proceeds	10.00%
Dealer Manager Agreement | Class AA
Due to Related Parties [Roll Forward]
Organizational and offering costs advanced by and due to the Advisor	4.00%
Daily accrual rate of shares sold	0.00274%
Dealer Manager Agreement | Class T
Due to Related Parties [Roll Forward]
Daily accrual rate of shares sold	0.00274%

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Average invested assets percentage	2.00%
Incurred	$ 22,272	$ 66,819	$ 47,207
Underwriting compensation, percent of gross proceeds	9.00%
Gross revenue percentage	1.00%
Property management fees percentage	3.00%
Construction management fee percentage	5.00%
Reimbursement, Reimbursible Expenses
Related Party Transaction [Line Items]
Sales revenue goods percentage	25.00%
Dealer Manager Agreement
Related Party Transaction [Line Items]
Dealer manager fee percentage	0.50%
Underwriting compensation, percent of gross proceeds	10.00%
Advisor and Property Manager Fees - Performance Distribution
Related Party Transaction [Line Items]
Percentage of total return	12.50%
Hurdle rate, annualized rate of return on net asset value	5.50%
Distribution percentage on excess profits before threshold	100.00%
Distribution threshold	12.50%
Distribution percentage on excess profits after threshold	12.50%
Incurred	$ 2,394	0	$ 0
Dealer Distribution Fee
Related Party Transaction [Line Items]
Underwriting compensation, percent of gross proceeds	9.00%
Class AA | Dealer Manager Agreement
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00274%
Class T
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00274%
Class T | Dealer Manager Agreement
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00274%
Sales commission on stock offering	3.00%
Class T | Advisory Agreement
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00342%
Class T | Dealer Distribution Fee
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00068%
Class T | Advisor Distribution Fee
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00205%
Class S
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00274%
Class S | Dealer Manager Agreement
Related Party Transaction [Line Items]
Sales commission on stock offering	3.50%
Class D
Related Party Transaction [Line Items]
Daily accrual rate of shares sold	0.00068%
Griffin Capital Essential Asset Advisor, LLC | Reimbursement, Services Provided That Are not Entitled to Advisor Fees
Related Party Transaction [Line Items]
Incurred	$ 700	$ 500
Griffin Capital Essential Asset Advisor, LLC | Reimbursement, Reimbursible Expenses
Related Party Transaction [Line Items]
Incurred	$ 200

Declaration of Distributions (D

Declaration of Distributions (Details)	3 Months Ended
	Dec. 31, 2017$ / shares
Declaration of Distributions [Abstract]
Dividends paid (in USD per share)	$ 0.00150684932

Selected Quarterly Financial 63

Selected Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 27,514	$ 27,349	$ 26,546	$ 25,972	$ 20,646	$ 16,334	$ 13,330	$ 12,502	$ 107,381	$ 62,812	$ 25,149
Net income (loss)	1,531	3,099	3,365	3,124	595	(2,736)	(2,825)	(1,141)	11,119	(6,107)	(16,504)
Net (loss)/income attributable to common stockholders	$ 1,531	$ 3,098	$ 3,364	$ 3,123	$ 595	$ (2,735)	$ (2,824)	$ (1,140)	$ 11,116	$ (6,104)	$ (17,247)
Net income (loss) per share, basic and diluted (in usd per share)	$ 0.03	$ 0.04	$ 0.04	$ 0.04	$ 0.01	$ (0.05)	$ (0.06)	$ (0.03)	$ 0.15	$ (0.12)	$ (1.19)

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 08, 2018	Feb. 16, 2018	Jan. 31, 2018	Mar. 07, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017
Subsequent Event [Line Items]
Shares of common stock redeemed (shares)					790,941
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.00150684932
Distribution Reinvestment Plan | Subsequent Event
Subsequent Event [Line Items]
Issuance of shares for distribution reinvestment plan (shares)				4,818,911
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan				$ 45.6
Follow-on Offering | Subsequent Event
Subsequent Event [Line Items]
Issuance of shares for distribution reinvestment plan (shares)				299,515
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan				$ 2.8
Share Redemption Program
Subsequent Event [Line Items]
Shares of common stock redeemed (shares)					623,499	167,442	790,941
Stock redeemed or called during period					$ 5.7	$ 1.6	$ 7.4
Weighted average price per share (in usd per share)					$ 9.21	$ 9.72	$ 9.32
Share Redemption Program | Subsequent Event
Subsequent Event [Line Items]
Shares of common stock redeemed (shares)			217,088
Stock redeemed or called during period			$ 2
Weighted average price per share (in usd per share)			$ 9.09
Performance distributions
Subsequent Event [Line Items]
Percentage of total return					12.50%
Performance distributions | Subsequent Event
Subsequent Event [Line Items]
Payment and issuance to advisor		$ 1.2
Limited Partnership Units [Member] | Performance distributions | Subsequent Event
Subsequent Event [Line Items]
Payment and issuance to advisor		$ 1.2

Schedule III - Real Estate an65

Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	$ 126,970
Land	122,482
Building and Improvements	1,055,471
Cost capitalized subsequent to acquisition	913
SEC Schedule III, Real Estate, Gross [Abstract]
Land	122,482
Building and Improvements	1,056,384
Total	1,178,866	$ 1,133,055	$ 516,965	$ 0
Accumulated Depreciation	83,905	$ 39,955	$ 12,061	$ 0
Owens Corning
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	3,300
Land	575
Building and Improvements	5,167
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	575
Building and Improvements	5,167
Total	5,742
Accumulated Depreciation	485
Westgate II
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	34,200
Land	3,732
Building and Improvements	55,101
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	3,732
Building and Improvements	55,101
Total	58,833
Accumulated Depreciation	6,488
Administrative Office of Pennsylvania Courts
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	6,070
Land	1,207
Building and Improvements	8,936
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,207
Building and Improvements	8,936
Total	10,143
Accumulated Depreciation	994
American Express Center
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	54,900
Land	5,750
Building and Improvements	113,670
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,750
Building and Improvements	113,670
Total	119,420
Accumulated Depreciation	17,706
MGM Corporate Center
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	18,180
Land	4,260
Building and Improvements	28,705
Cost capitalized subsequent to acquisition	405
SEC Schedule III, Real Estate, Gross [Abstract]
Land	4,260
Building and Improvements	29,110
Total	33,370
Accumulated Depreciation	3,387
American Showa
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Encumbrances	10,320
Land	1,453
Building and Improvements	15,747
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,453
Building and Improvements	15,747
Total	17,200
Accumulated Depreciation	1,475
Huntington Ingalls
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,415
Building and Improvements	29,836
Cost capitalized subsequent to acquisition	18
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,415
Building and Improvements	29,854
Total	35,269
Accumulated Depreciation	2,778
Wyndham
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,696
Building and Improvements	76,532
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,696
Building and Improvements	76,532
Total	82,228
Accumulated Depreciation	6,601
Exel
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	1,988
Building and Improvements	13,958
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,988
Building and Improvements	13,958
Total	15,946
Accumulated Depreciation	1,461
Morpho Detection
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	2,350
Building and Improvements	9,482
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	2,350
Building and Improvements	9,482
Total	11,832
Accumulated Depreciation	1,132
FedEx Freight
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	2,774
Building and Improvements	25,913
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	2,774
Building and Improvements	25,913
Total	28,687
Accumulated Depreciation	2,331
Aetna
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	1,853
Building and Improvements	20,481
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,853
Building and Improvements	20,481
Total	22,334
Accumulated Depreciation	1,243
Bank of America I
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,491
Building and Improvements	23,514
Cost capitalized subsequent to acquisition	138
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,491
Building and Improvements	23,652
Total	29,143
Accumulated Depreciation	3,724
Bank of America II
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	9,206
Building and Improvements	20,204
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	9,206
Building and Improvements	20,204
Total	29,410
Accumulated Depreciation	3,674
Atlas Copco
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	1,480
Building and Improvements	16,490
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,480
Building and Improvements	16,490
Total	17,970
Accumulated Depreciation	1,626
Toshiba Tec Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	4,130
Building and Improvements	36,821
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	4,130
Building and Improvements	36,821
Total	40,951
Accumulated Depreciation	2,691
Netgear
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	20,726
Building and Improvements	25,887
Cost capitalized subsequent to acquisition	43
SEC Schedule III, Real Estate, Gross [Abstract]
Land	20,726
Building and Improvements	25,930
Total	46,656
Accumulated Depreciation	2,148
Nike
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,988
Building and Improvements	42,397
Cost capitalized subsequent to acquisition	24
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,988
Building and Improvements	42,421
Total	48,409
Accumulated Depreciation	4,603
Zebra Technologies
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,238
Building and Improvements	56,526
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,238
Building and Improvements	56,526
Total	61,764
Accumulated Depreciation	3,843
WABCO Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	1,302
Building and Improvements	12,598
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,302
Building and Improvements	12,598
Total	13,900
Accumulated Depreciation	682
IGT
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	6,325
Building and Improvements	64,441
Cost capitalized subsequent to acquisition	40
SEC Schedule III, Real Estate, Gross [Abstract]
Land	6,325
Building and Improvements	64,481
Total	70,806
Accumulated Depreciation	2,695
3M Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,320
Building and Improvements	62,247
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,320
Building and Improvements	62,247
Total	67,567
Accumulated Depreciation	2,475
Amazon Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	5,331
Building and Improvements	85,770
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	5,331
Building and Improvements	85,770
Total	91,101
Accumulated Depreciation	2,903
Zoetis Headquarters Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	3,375
Building and Improvements	42,265
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	3,375
Building and Improvements	42,265
Total	45,640
Accumulated Depreciation	1,749
Southern Co. Services HQ Properties
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	6,605
Building and Improvements	122,679
Cost capitalized subsequent to acquisition	45
SEC Schedule III, Real Estate, Gross [Abstract]
Land	6,605
Building and Improvements	122,724
Total	129,329
Accumulated Depreciation	3,488
The Allstate Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	1,808
Building and Improvements	14,090
Cost capitalized subsequent to acquisition	200
SEC Schedule III, Real Estate, Gross [Abstract]
Land	1,808
Building and Improvements	14,290
Total	16,098
Accumulated Depreciation	679
MISO Property
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land	3,104
Building and Improvements	26,014
Cost capitalized subsequent to acquisition	0
SEC Schedule III, Real Estate, Gross [Abstract]
Land	3,104
Building and Improvements	26,014
Total	29,118
Accumulated Depreciation	$ 844
Minimum | Owens Corning
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Westgate II
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Administrative Office of Pennsylvania Courts
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | American Express Center
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | MGM Corporate Center
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | American Showa
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Huntington Ingalls
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Wyndham
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Exel
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Morpho Detection
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | FedEx Freight
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Aetna
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Bank of America I
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Bank of America II
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Atlas Copco
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Toshiba Tec Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Netgear
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Nike
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Zebra Technologies
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | WABCO Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | IGT
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | 3M Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Amazon Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Zoetis Headquarters Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | Southern Co. Services HQ Properties
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | The Allstate Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Minimum | MISO Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	5 years
Maximum | Owens Corning
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Westgate II
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Administrative Office of Pennsylvania Courts
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | American Express Center
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | MGM Corporate Center
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | American Showa
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Huntington Ingalls
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Wyndham
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Exel
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Morpho Detection
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | FedEx Freight
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Aetna
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Bank of America I
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Bank of America II
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Atlas Copco
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Toshiba Tec Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Netgear
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Nike
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Zebra Technologies
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | WABCO Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | IGT
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | 3M Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Amazon Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Zoetis Headquarters Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | Southern Co. Services HQ Properties
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | The Allstate Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years
Maximum | MISO Property
SEC Schedule III, Real Estate, Gross [Abstract]
Life used for depreciation	40 years

Schedule III - Real Estate an66

Schedule III - Real Estate and Accumulated Depreciation - Rollforward of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	$ 1,133,055	$ 516,965	$ 0
Acquisitions	45,016	615,972	516,965
Improvements	576	38	0
Construction-in-progress	219	80	0
Balance at end of year	1,178,866	1,133,055	516,965
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	39,955	12,061	0
Depreciation and amortization expense	43,950	27,894	12,061
Balance at end of year	83,905	39,955	12,061
Total real estate, net	$ 1,094,961	$ 1,093,100	$ 504,904