Carter Validus Mission Critical REIT 10-K 30 Mar 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Mar. 28, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Entity Registrant Name	Carter Validus Mission Critical REIT, Inc.
Entity Central Index Key	1,482,974
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 1,859,860
Entity Common Stock, Shares Outstanding		183,643

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Real estate:
Land	$ 73,769	$ 84,849
Buildings and improvements, less accumulated depreciation of $86,092 and $64,895, respectively	834,419	938,338
Construction in process	0	16,143
Total real estate, net	908,188	1,039,330
Cash and cash equivalents	336,500	42,613
Acquired intangible assets, less accumulated amortization of $23,640 and $17,369, respectively	86,938	94,675
Other assets, net	79,140	67,571
Assets of discontinued operations, net ($6,852 and $106,338, respectively, related to VIE)	213,833	1,093,465
Total assets	1,624,599	2,337,654
Liabilities:
Notes payable, net of deferred financing costs of $875 and $1,385, respectively	140,602	172,042
Credit facility, net of deferred financing costs of $1,789	0	356,211
Accounts payable due to affiliates	2,372	2,399
Accounts payable and other liabilities	28,195	21,986
Intangible lease liabilities, less accumulated amortization of $4,694 and $3,692, respectively	17,555	18,667
Liabilities of discontinued operations, net ($599 and $63,192, respectively, related to VIE)	5,058	361,405
Total liabilities	193,782	932,710
Stockholders’ equity:
Preferred stock, $0.01 par value per share, 50,000,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value per share, 300,000,000 shares authorized; 196,892,945 and 189,848,165 shares issued, respectively; 186,181,545 and 184,909,673 shares outstanding, respectively	1,862	1,849
Additional paid-in capital	1,635,329	1,625,862
Accumulated distributions in excess of earnings	(211,750)	(258,878)
Accumulated other comprehensive income	407	1,823
Total stockholders’ equity	1,425,848	1,370,656
Noncontrolling interests	4,969	34,288
Total equity	1,430,817	1,404,944
Total liabilities and stockholders’ equity	$ 1,624,599	$ 2,337,654

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Buildings and improvements, accumulated depreciation	$ 86,092	$ 64,895
Acquired intangible assets, accumulated amortization	23,640	17,369
Assets of discontinued operations, net	213,833	1,093,465
Notes payable, deferred financing costs	875	1,385
Credit facility, deferred financing costs	0	1,789
Intangible lease liabilities, accumulated amortization	4,694	3,692
Liabilities of discontinued operations, net	$ 5,058	$ 361,405
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	196,892,945	189,848,165
Common stock, shares outstanding	186,181,545	184,909,673
Variable Interest Entity, Primary Beneficiary [Member]
Assets of discontinued operations, net	$ 6,852	$ 106,338
Liabilities of discontinued operations, net	$ 599	$ 63,192

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Rental revenue	$ 88,960	$ 86,772	$ 92,371
Tenant reimbursement revenue	5,454	3,465	4,121
Real estate-related notes receivable interest income	0	0	326
Total revenue	94,414	90,237	96,818
Expenses:
Rental expenses	13,071	8,972	7,363
General and administrative expenses	7,185	6,251	6,340
Acquisition related expenses	0	1,667	3,693
Asset management fees	10,611	10,956	9,622
Depreciation and amortization	33,540	47,591	30,429
Total expenses	64,407	75,437	57,447
Income from operations	30,007	14,800	39,371
Other income (expense):
Other interest and dividend income	3,147	13,295	8,669
Interest expense, net	(19,109)	(23,323)	(15,969)
Provision for loan losses	(11,936)	(4,294)	0
Impairment loss on real estate	(39,147)	0	0
Total other expense	(67,045)	(14,322)	(7,300)
(Loss) income from continuing operations	(37,038)	478	32,071
Income from discontinued operations	261,675	34,679	36,305
Net income	224,637	35,157	68,376
Net income attributable to noncontrolling interests in consolidated partnerships	(47,326)	(3,921)	(4,938)
Net income attributable to common stockholders	177,311	31,236	63,438
Other comprehensive income (loss):
Unrealized (loss) income on interest rate swaps, net	(1,416)	4,403	(1,045)
Other comprehensive (loss) income	(1,416)	4,403	(1,045)
Other comprehensive loss attributable to noncontrolling interests in consolidated partnerships	0	0	106
Other comprehensive (loss) income attributable to common stockholders	(1,416)	4,403	(939)
Comprehensive income	223,221	39,560	67,331
Comprehensive income attributable to noncontrolling interests in consolidated partnerships	(47,326)	(3,921)	(4,832)
Comprehensive income attributable to common stockholders	$ 175,895	$ 35,639	$ 62,499
Weighted average number of common shares outstanding:
Basic (in shares)	185,922,468	183,279,872	178,521,807
Diluted (in shares)	185,922,468	183,297,662	178,539,609
Basic:
Continuing operations (in dollars per share)	$ (0.20)	$ 0	$ 0.17
Discontinued operations (in dollars per share)	1.15	0.17	0.19
Net income attributable to common stockholders (in dollars per share)	0.95	0.17	0.36
Diluted:
Continuing operations (in dollars per share)	(0.20)	0	0.17
Discontinued operations (in dollars per share)	1.15	0.17	0.19
Net income attributable to common stockholders (in dollars per share)	$ 0.95	$ 0.17	$ 0.36

Consolidated Statements Of Stoc

Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Distributions in Excess of Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Stockholders' Equity [Member]	Noncontrolling Interests [Member]
Balance, (in shares) at Dec. 31, 2014		175,038,055
Balance, at Dec. 31, 2014	$ 1,530,593	$ 1,750	$ 1,557,623	$ (100,273)	$ (1,161)	$ 1,457,939	$ 72,654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock (in shares)		10,500
Vesting of restricted stock	90		90			90	0
Issuance of common stock under the distribution reinvestment plan (in shares)		7,135,720
Issuance of common stock under the distribution reinvestment plan	67,821	$ 72	67,749			67,821	0
Purchase of noncontrolling interests	(66,199)		(24,786)		(480)	(25,266)	(40,933)
Distributions to noncontrolling interests	(2,887)					0	(2,887)
Distributions declared to common stockholders	(124,963)			(124,963)		(124,963)	0
Other offering costs	(149)		(149)			(149)	0
Repurchase of common stock (in shares)		(983,323)
Repurchase of common stock	(9,461)	$ (10)	(9,451)			(9,461)	0
Other comprehensive income (loss)	(1,045)				(939)	(939)	(106)
Net income	68,376			63,438		63,438	4,938
Balance, (in shares) at Dec. 31, 2015		181,200,952
Balance, at Dec. 31, 2015	1,462,176	$ 1,812	1,591,076	(161,798)	(2,580)	1,428,510	33,666
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock (in shares)		9,000
Vesting of restricted stock	90		90			90	0
Issuance of common stock under the distribution reinvestment plan (in shares)		7,131,264
Issuance of common stock under the distribution reinvestment plan	68,086	$ 71	68,015			68,086	0
Distributions to noncontrolling interests	(3,299)					0	(3,299)
Distributions declared to common stockholders	(128,316)			(128,316)		(128,316)	0
Other offering costs	(18)		(18)			(18)	0
Repurchase of common stock (in shares)		(3,431,543)
Repurchase of common stock	(33,335)	$ (34)	(33,301)			(33,335)	0
Other comprehensive income (loss)	4,403				4,403	4,403	0
Net income	$ 35,157			31,236		31,236	3,921
Balance, (in shares) at Dec. 31, 2016	184,909,673	184,909,673
Balance, at Dec. 31, 2016	$ 1,404,944	$ 1,849	1,625,862	(258,878)	1,823	1,370,656	34,288
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock (in shares)		9,000
Vesting of restricted stock	88		88			88	0
Issuance of common stock under the distribution reinvestment plan (in shares)		7,035,781
Issuance of common stock under the distribution reinvestment plan	66,993	$ 71	66,922			66,993	0
Purchase of noncontrolling interests	(500)		(500)			(500)	0
Distributions to noncontrolling interests	(76,645)					0	(76,645)
Distributions declared to common stockholders	(130,183)			(130,183)		(130,183)	0
Other offering costs	(52)		(52)			(52)	0
Repurchase of common stock (in shares)		(5,772,909)
Repurchase of common stock	(57,049)	$ (58)	(56,991)			(57,049)	0
Other comprehensive income (loss)	(1,416)				(1,416)	(1,416)	0
Net income	$ 224,637			177,311		177,311	47,326
Balance, (in shares) at Dec. 31, 2017	186,181,545	186,181,545
Balance, at Dec. 31, 2017	$ 1,430,817	$ 1,862	$ 1,635,329	$ (211,750)	$ 407	$ 1,425,848	$ 4,969

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 224,637	$ 35,157	$ 68,376
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	65,750	86,335	70,711
Amortization of deferred financing costs	3,778	4,576	3,947
Amortization of above-market leases	353	421	403
Amortization of intangible lease liabilities	(3,471)	(3,718)	(8,432)
Amortization of real estate-related notes receivable origination costs and commitment fees	0	0	114
Gain on sale of discontinued operations	(224,133)	0	0
Provision for doubtful accounts	18,733	6,007	3,376
Provision for loan losses	11,936	4,294	0
Impairment loss on real estate	39,147	0	0
Loss on debt extinguishment	4,513	1,133	0
Straight-line rent	(13,342)	(3,941)	(21,889)
Stock-based compensation	88	90	90
Change in fair value of contingent consideration	(2,920)	300	(1,230)
Changes in operating assets and liabilities:
Accounts payable and other liabilities	1,503	4,087	1,979
Accounts payable due to affiliates	(106)	405	331
Other assets	(21,188)	(12,325)	(10,117)
Net cash provided by operating activities	105,278	122,821	107,659
Cash flows from investing activities:
Investment in real estate	0	(71,000)	(123,753)
Proceeds from real estate disposals	1,131,582	0	0
Capital expenditures	(23,765)	(69,496)	(69,391)
Real estate deposits, net	0	450	(258)
Real estate-related notes receivable advances	0	0	(267)
Collections of real estate-related notes receivable	514	0	9,500
Preferred equity investment	0	127,147	(127,147)
Notes receivable, net	(15,500)	(5,919)	(13,000)
Net cash provided by (used in) investing activities	1,092,831	(18,818)	(324,316)
Cash flows from financing activities:
Proceeds from notes payable	0	0	64,305
Payments on notes payable	(345,335)	(56,521)	(11,882)
Proceeds from credit facility	121,000	185,000	245,000
Payments on credit facility	(479,000)	(120,000)	(27,000)
Cost paid on extinguishment of debt	(2,932)	(790)	0
Payments of deferred financing costs	(1,788)	(467)	(2,434)
Repurchase of common stock	(57,049)	(33,335)	(9,461)
Other offering costs	(52)	(18)	(149)
Distributions to stockholders	(63,082)	(60,038)	(56,775)
Purchase of noncontrolling interests	(500)	0	(66,199)
Distributions to noncontrolling interests	(75,062)	(3,299)	(2,887)
Net cash (used in) provided by financing activities	(903,800)	(89,468)	132,518
Net change in cash, cash equivalents and restricted cash	294,309	14,535	(84,139)
Cash, cash equivalents and restricted cash - Beginning of year	57,605	43,070	127,209
Cash, cash equivalents and restricted cash - End of year	351,914	57,605	43,070
Supplemental cash flow disclosure:
Interest paid, net of interest capitalized of $2,771, $2,859 and $4,253, respectively	35,432	34,980	29,454
Supplemental disclosure of non-cash transactions:
Common stock issued through distribution reinvestment plan	66,993	68,086	67,821
Net unrealized (loss) gain on interest rate swaps	(1,416)	4,403	(1,045)
Real estate-related notes receivable converted to investment in real estate	0	0	13,674
Deemed distributions related to taxes withheld	$ 1,992	$ 0	$ 0

Consolidated Statements Of Cas7

Consolidated Statements Of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Cash Flows [Abstract]
Interest capitalized	$ 2,771	$ 2,859	$ 4,253

Organization and Business Opera

Organization and Business Operations	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business Operations	Organization and Business Operations Carter Validus Mission Critical REIT, Inc., or the Company, a Maryland corporation, was incorporated on December 16, 2009 and elected to be taxed and currently qualifies as a real estate investment trust, or a REIT, under the Internal Revenue Code of 1986, as amended, or the Code, for federal income tax purposes. The Company was organized to acquire and operate a diversified portfolio of income-producing commercial real estate, with a focus on the data center and healthcare property sectors, net leased to creditworthy tenants, as well as to make other real estate-related investments that relate to such property types. During the year ended December 31, 2017, the Company's board of directors made a determination to sell the data center assets. This decision represents a strategic shift that has a major effect on the Company's results and operations and assets and liabilities for the years presented. As a result, the Company has its data centers segment as a part of discontinued operations. During the year ended December 31, 2017, the Company completed the sale of 16 real estate properties, 15 data centers (including one real estate property owned through a consolidated partnership) and one healthcare property, for an aggregate sale price of $1,153,000,000 , with net proceeds of approximately $1,131,582,000 . The Company operates through one reportable segment—commercial real estate investments in healthcare. Substantially all of the Company’s business is conducted through Carter/Validus Operating Partnership, LP, a Delaware limited partnership, or the Operating Partnership. The Company is the sole general partner of the Operating Partnership. Carter/Validus Advisors, LLC, or the Advisor, the Company’s affiliated advisor, is the special limited partner of the Operating Partnership. The Company ceased offering shares of common stock in its initial public offering, or the Offering, on June 6, 2014. At the completion of the Offering, the Company raised gross proceeds of approximately $1,716,046,000 (including shares of common stock issued pursuant to a distribution reinvestment plan, or the DRIP). The Company will continue to issue shares of common stock under the Third DRIP Offering (as defined below) until such time as the Company sells all of the shares registered for sale under the Third DRIP Offering, unless the Company files a new registration statement with the Securities and Exchange Commission, or the SEC, or the Third DRIP Offering is terminated by the Company’s board of directors. On April 14, 2014, the Company registered 10,526,315 shares of common stock for a price per share of $9.50 for a proposed maximum offering price of $100,000,000 in shares of common stock under the DRIP pursuant to a registration statement on Form S-3, or the First DRIP Offering. On November 25, 2015, the Company ceased offering shares of common stock pursuant to the First DRIP Offering and registered an additional 10,473,946 shares of common stock for a price per share of $9.5475 , which was the greater of (i) 95% of the fair market value per share as determined by our board of directors as of September 30, 2015 and (ii) $9.50 per share, for a proposed maximum offering price of $100,000,000 in shares of common stock under the DRIP pursuant to a registration statement on Form S-3, or the Second DRIP Offering. On May 22, 2017, the Company ceased offering shares of common stock pursuant to the Second DRIP Offering and registered an additional 11,387,512 shares of common stock for a price per share of $9.519 , which was the greater of (i) 95% of the fair market value per share as determined by our board of directors as of September 30, 2016 and (ii) $9.50 per share, for a proposed maximum offering price of $108,397,727 in shares of common stock under the DRIP pursuant to a new registration statement on Form S-3, or the Third DRIP Offering. The Company refers to the First DRIP Offering, the Second DRIP Offering and the Third DRIP Offering as the DRIP Offerings, and collectively with the Offering, the Offerings. On December 21, 2017, the Company's board of directors approved an amendment to the DRIP in order for the purchase price per DRIP share to equal the most recent estimated per share net asset value, as determined by the board. As a result, effective February 1, 2018, shares were offered pursuant to the Third DRIP Offering for a price per share of $9.26 . In connection with a special cash distribution paid on March 16, 2018 to stockholders of record on February 15, 2018, effective February 15, 2018, shares are offered pursuant to the Third DRIP Offering for a price per share of $6.26 . As of December 31, 2017 , the Company had issued approximately 196,826,000 shares of common stock in the Offerings for gross proceeds of $1,946,761,000 , before share repurchases of $104,911,000 and offering costs, selling commissions and dealer manager fees of $174,845,000 . As of December 31, 2017 , the Company owned 34 real estate investments (including real estate investments classified as discontinued operations), consisting of 68 properties. Except as the context otherwise requires, “we,” “our,” “us,” and the “Company” refer to Carter Validus Mission Critical REIT, Inc., the Operating Partnership, all majority-owned subsidiaries and controlled subsidiaries.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The summary of significant accounting policies presented below is designed to assist in understanding the consolidated financial statements. Such consolidated financial statements and the accompanying notes thereto are the representations of management. These accounting policies conform to accounting principles generally accepted in the United States of America, or GAAP, in all material respects, and have been consistently applied in preparing the consolidated financial statements. Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements include the accounts of the Company, the Operating Partnership, all majority-owned subsidiaries and controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. As of December 31, 2017 , in addition to the Operating Partnership consolidation, the Company consolidated the accounts of one VIE, the 180 Peachtree Data Center, as the Company has the power to direct the activities that most significantly impact the entity’s economic performance. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP necessarily requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates are made and evaluated on an ongoing basis using information that is currently available as well as various other assumptions believed to be reasonable under the circumstances. Actual results could differ from those estimates. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value. Restricted Cash Restricted cash consists of restricted cash held in escrow and restricted bank deposits. Restricted cash held in escrow includes cash held by lenders in escrow accounts for tenant and capital improvements, repairs and maintenance and other lender reserves for certain properties, in accordance with the respective lender’s loan agreement. Restricted cash is reported in other assets, net in the accompanying consolidated balance sheets . Restricted bank deposits consist of tenant receipts for certain properties which are required to be deposited into lender controlled accounts in accordance with the respective lender's loan agreement. Restricted bank deposits are reported in other assets, net in the accompanying consolidated balance sheets . See Note 6—"Other Assets, Net." On April 1, 2017, the Company adopted Accounting Standards Update, or ASU, 2016-18, Restricted Cash , or ASU 2016-18. ASU 2016-18 requires that a statement of cash flows explain the change during a reporting period in the total of cash, cash equivalents, and amounts generally described as restricted cash. This ASU states that transfers between cash, cash equivalents, and restricted cash are not part of the Company’s operating, investing, and financing activities. Therefore, restricted cash should be included with cash and cash equivalents when reconciling the beginning of period and end of period total amounts shown on the statement of cash flows. As required, the Company retrospectively applied the guidance in ASU 2016-18 to the prior period presented, which resulted in a decrease of $221,000 in net cash used in financing activities and an increase of $228,000 in net cash provided by operating activities for the year ended December 31, 2016 and an increase of $279,000 in net cash provided by financing activities and an increase of $148,000 in net cash provided by operating activities for the year ended December 31, 2015 on the consolidated statements of cash flows . The following table presents a reconciliation of the beginning of year and end of year cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the totals shown in the consolidated statements of cash flows : For the Year Ended Beginning of year: 2017 2016 2015 Cash and cash equivalents $ 42,613 $ 28,527 $ 113,093 Restricted cash (1) 14,992 14,543 14,116 Cash, cash equivalents and restricted cash $ 57,605 $ 43,070 $ 127,209 End of year: Cash and cash equivalents $ 336,500 $ 42,613 $ 28,527 Restricted cash (1) 15,414 14,992 14,543 Cash, cash equivalents and restricted cash $ 351,914 $ 57,605 $ 43,070 (1) Amount attributable to continuing and discontinued operations. Deferred Financing Costs Deferred financing costs are loan fees, legal fees and other third-party costs associated with obtaining financing. These costs are amortized over the terms of the respective financing agreements using the effective interest method. Unamortized deferred financing costs are generally expensed when the associated debt is refinanced or repaid before maturity unless specific rules are met that would allow for the carryover of such costs to the refinanced debt. Costs incurred in seeking financing transactions that do not close are expensed in the period in which it is determined that the financing will not close. Deferred financing costs are recorded as a reduction of the related debt on the accompanying consolidated balance sheets. Investment in Real Estate Real estate costs related to the acquisition, development, construction and improvement of properties are capitalized. Repair and maintenance costs are expensed as incurred and significant replacements and betterments are capitalized. Repair and maintenance costs include all costs that do not extend the useful life of the real estate asset. The Company considers the period of future benefit of an asset in determining the appropriate useful life. Real estate assets, other than land, are depreciated or amortized on a straight-line basis over each asset’s useful life. The Company estimated the useful lives of its assets by class as follows: Buildings and improvements 15 – 40 years Tenant improvements Shorter of lease term or expected useful life Furniture, fixtures, and equipment 3 – 10 years Allocation of Purchase Price of Real Estate Upon the acquisition of real properties, the Company evaluates whether the acquisition is a business combination or an asset acquisition. For both business combinations and asset acquisitions the Company allocates the purchase price of properties to acquired tangible assets, consisting of land, buildings and improvements, and acquired intangible assets and liabilities, consisting of the value of above-market and below-market leases and the value of in-place leases. For asset acquisitions, the Company capitalizes transaction costs and allocates the purchase price using a relative fair value method allocating all accumulated costs. For business combinations, the Company expenses transaction costs associated as incurred and allocates the purchase price based on the estimated fair value of each separately identifiable asset and liability. The fair values of the tangible assets of an acquired property (which includes the land and buildings and improvements) are determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land and buildings and improvements based on management’s determination of the relative fair value of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market conditions. The fair values of above-market and below-market in-place lease values are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) an estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease including any fixed rate bargain renewal periods, with respect to a below-market lease. The above-market and below-market lease values are capitalized as intangible lease assets or liabilities. Above-market lease values are amortized as an adjustment of rental income over the remaining terms of the respective leases. Below-market leases are amortized as an adjustment of rental income over the remaining terms of the respective leases, including any fixed rate bargain renewal periods. If a lease were to be terminated prior to its stated expiration, all unamortized amounts of above-market and below-market in-place lease values related to that lease would be recorded as an adjustment to rental income. The fair values of in-place leases include an estimate of direct costs associated with obtaining a new tenant and opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease. Direct costs associated with obtaining a new tenant include commissions, tenant improvements, and other direct costs and are estimated based on management’s consideration of current market costs to execute a similar lease. The value of opportunity costs is calculated using the contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. The in-place lease intangibles are amortized to expense over the remaining terms of the respective leases. If a lease were to be terminated prior to its stated expiration, all unamortized amounts of in-place lease assets relating to that lease would be expensed. Held for Sale and Discontinued Operations The Company classifies a real estate property as held for sale upon satisfaction all of the following criteria: (i) management commits to a plan to sell a property, (ii) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary for sales of such properties, (iii) there is an active program to locate a buyer, (iv) the sale of the property is probable and transfer of the asset is expected to be completed within one year, (v) the property is being actively marketed for sale, and (vi) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Upon the determination to classify a property as held for sale, the Company ceases depreciation and amortization on the real estate properties held for sale, including depreciation for tenant improvements, as well as on the amortization of acquired in-place leases. The real estate properties held for sale and associated liabilities are classified separately on the consolidated balance sheets. Such properties are recorded at the lesser of the carrying value or estimated fair value less estimated cost to sell. Additionally, the Company classified real estate properties held for sale as discontinued operations for all periods presented if the disposal represents a strategic shift that has (or will have) a major effect on the Company's results and operations, the assets, liabilities and operations for the years presented are classified on the consolidated balance sheets and consolidated statements of comprehensive income as discontinued operations for all periods presented. Acquisition Fees and Expenses Acquisition fees and expenses associated with the acquisition of properties determined to be business combinations are expensed as incurred, including investment transactions that are no longer under consideration, and are included in acquisition related expenses in the accompanying consolidated statements of comprehensive income . During the years ended December 31, 2017 , 2016 and 2015 , the Company expensed acquisition fees and expenses related to business combinations transactions in the amount of $0 , $1,667,000 and $3,473,000 , respectively. Acquisition fees and expenses associated with transactions determined to be asset acquisitions are capitalized in real estate, net in the accompanying consolidated balance sheets. We did not capitalize acquisition fees and expenses for the years ended December 31, 2017 , 2016 and 2015 . Impairment of Long Lived Assets The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets may not be recoverable. When indicators of potential impairment suggest that the carrying value of real estate and related intangible assets may not be recoverable, the Company assesses the recoverability of the assets by estimating whether the Company will recover the carrying value of the assets through its undiscounted future cash flows and their eventual disposition. If based on this analysis the Company does not believe that it will be able to recover the carrying value of the assets, the Company will record an impairment loss to the extent that the carrying value exceeds the estimated fair value of the assets. During the year ended December 31, 2017, real estate assets related to four properties with an aggregate carrying amount of $85,768,000 were determined to be impaired, using Level 3 inputs of the fair value hierarchy (defined below), and their carrying values were reduced to their estimated fair value of $52,557,000 , resulting in an impairment charge of $33,211,000 , which is included in impairment loss on real estate in the consolidated statements of comprehensive income . The Company reviews each property based on the highest and best use and market participant assumptions. The Company used a discounted cash flow analysis and a market approach analysis to estimate the fair value of real estate assets relating to the properties. See Note 12—"Fair Value" for more details. In addition, during the year ended December 31, 2017 , the Company recorded an impairment loss of $5,936,000 related to one real estate property, which was sold on December 28, 2017 in the amount of $88,000,000 . The impairment loss is included in impairment loss on real estate in the consolidated statements of comprehensive income . No impairment losses were recorded during the years ended December 31, 2016 and 2015 . When developing estimates of expected future cash flows, the Company makes certain assumptions regarding future market rental income amounts subsequent to the expiration of current lease arrangements, property operating expenses, terminal capitalization and discount rates, the expected number of months it takes to re-lease the property, required tenant improvements and the number of years the property will be held for investment. The use of alternative assumptions in the future cash flow analysis could result in a different determination of the property’s future cash flows and a different conclusion regarding the existence of an impairment, the extent of such loss, if any, as well as the carrying value of the real estate and related assets. For the year ended December 31, 2017 , the Company recognized an impairment of three in-place lease intangible assets in the amount of approximately $1,151,000 and one below-market lease in the amount of approximately $86,000 by accelerating the amortization of the intangibles as a result of a lease amendment. For the year ended December 31, 2016 , the Company recognized an impairment of one in-place lease intangible asset and one capitalized lease commission by accelerating the amortization in the amount of $16,400,000 as a result of two tenants experiencing financial difficulties. Fair Value Accounting Standards Codification, or ASC, 820, Fair Value Measurements and Disclosures , or ASC 820, defines fair value, establishes a framework for measuring fair value in accordance with GAAP and expands disclosures about fair value measurements. ASC 820 emphasizes that fair value is intended to be a market-based measurement, as opposed to a transaction-specific measurement. Fair value is defined by ASC 820 as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, various techniques and assumptions can be used to estimate the fair value. Assets and liabilities are measured using inputs from three levels of the fair value hierarchy, as follows: Level 1—Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. An active market is defined as a market in which transactions for the assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2—Inputs other than quoted prices for similar assets and liabilities in active markets that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data correlation or other means (market corroborated inputs). Level 3—Unobservable inputs, only used to the extent that observable inputs are not available, reflect the Company’s assumptions about the pricing of an asset or liability. The following describes the methods the Company used to estimate the fair value of the Company’s financial assets and liabilities: Cash and cash equivalents, restricted cash, tenant receivables, property escrow deposits, prepaid expenses, accounts payable and accrued liabilities —The Company considered the carrying values of these financial instruments, assets and liabilities, to approximate fair value because of the short period of time between origination of the instruments and their expected realization. Notes payable—Fixed Rate —The fair value is estimated by discounting the expected cash flows on notes payable at current rates at which management believes similar loans would be made considering the terms and conditions of the loan and prevailing market interest rates. Notes payable—Variable Rate —The carrying value of variable rate notes payable approximates fair value because the interest rates adjust with current market conditions. Unsecured credit facility—Fixed Rate —The fair value is estimated by discounting the expected cash flows on the fixed rate unsecured credit facility at current rates at which management believes similar borrowings would be made considering the terms and conditions of the borrowings and prevailing market interest rates. Unsecured credit facility—Variable Rate —The carrying value of the variable rate unsecured credit facility approximates fair value as the interest is calculated at the London Interbank Offered Rate, plus an applicable margin. The interest rate resets to market on a monthly basis. The fair value of the Company's variable rate unsecured credit facility is estimated based on the interest rates currently offered to the Company by financial institutions. Notes receivable —The fair value is estimated by discounting the expected cash flows on the notes at interest rates at which management believes similar loans would be made. Derivative instruments —The Company’s derivative instruments consist of interest rate swaps. These swaps are carried at fair value to comply with the provisions of ASC 820. The fair value of these instruments is determined using interest rate market pricing models. The Company incorporated credit valuation adjustments to appropriately reflect the Company’s nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. Considerable judgment is necessary to develop estimated fair values of financial assets and liabilities. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize, or be liable for on disposition of the financial assets and liabilities. Revenue Recognition, Tenant Receivables and Allowance for Uncollectible Accounts The Company recognizes revenue in accordance with ASC 605, Revenue Recognition , or ASC 605. ASC 605 requires that all four of the following basic criteria be met before revenue is realized or realizable and earned: (1) there is persuasive evidence that an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the seller’s price to the buyer is fixed and determinable; and (4) collectability is reasonably assured. In accordance with ASC 840, Leases , minimum rental revenue is recognized on a straight-line basis over the term of the related lease (including rent holidays). Differences between rental income recognized and amounts contractually due under the lease agreements are credited or charged to deferred rent receivable or deferred rent liability, as applicable. Tenant reimbursement revenue, which is comprised of additional amounts recoverable from tenants for common area maintenance expenses and certain other recoverable expenses, is recognized as revenue in the period in which the related expenses are incurred. Tenant reimbursements are recognized and presented in accordance with ASC Subtopic 605-45, Revenue Recognition—Principal Agent Consideration, or ASC 605-45. ASC 605-45 requires that these reimbursements be recorded on a gross basis, when the Company is the primary obligor with respect to purchasing goods and services from third-party suppliers and has discretion in selecting the supplier and has credit risk. Tenant receivables and unbilled deferred rent receivables are carried net of the allowances for uncollectible amounts. An allowance will be maintained for estimated losses resulting from the inability of certain tenants to meet the contractual obligations under their lease agreements. The Company also maintains an allowance for deferred rent receivables arising from the straight-lining of rents. The Company’s determination of the adequacy of these allowances is based primarily upon evaluations of historical loss experience, the tenant’s financial condition, security deposits, letters of credit, lease guarantees and current economic conditions and other relevant factors. For the years ended December 31, 2017 and 2016 , the Company recorded $20,755,000 and $26,177,000 , respectively, in provision for doubtful accounts for rental revenue, tenant reimbursement revenue and straight-line rent receivable, which are recognized in the accompanying consolidated statements of comprehensive income as a deduction from rental revenue and tenant reimbursement revenue. For the year ended December 31, 2015, the Company recorded $3,376,000 in provision for doubtful accounts. Notes Receivable Notes receivable are reported at their outstanding principal balance, net of any unearned income, unamortized deferred fees and costs and allowances for loan losses. The unamortized deferred fees and costs are amortized over the life of the notes receivable, as applicable and recorded in other interest and dividend income in the accompanying consolidated statements of comprehensive income . The Company evaluates the collectability of both interest and principal on each note receivable to determine whether it is collectible, primarily through the evaluation of credit quality indicators, such as the tenant's financial condition, evaluations of historical loss experience, current economic conditions and other relevant factors, including contractual terms of repayments. Evaluating a note receivable for potential impairment requires management to exercise significant judgment. As of December 31, 2017 and 2016 , the aggregate balance on the Company's notes receivable, including accrued interest receivable, before allowances for loan losses was $36,368,000 and $19,422,000 , respectively. For the years ended December 31, 2017 and 2016 , the Company recorded $11,936,000 and $4,294,000 , respectively, as an allowance to reduce the carrying value of notes receivable, accrued interest and origination fees related to two tenants in provision for loan losses in the accompanying consolidated financial statements. Income Taxes The Company currently qualifies and is taxed as a REIT under Sections 856 through 860 of the Code. Accordingly, it will generally not be subject to corporate U.S. federal or state income tax to the extent that it makes qualifying distributions to stockholders, and provided it satisfies, on a continuing basis, through actual investment and operating results, the REIT requirements, including certain asset, income, distribution and stock ownership tests. If the Company fails to qualify as a REIT, and does not qualify for certain statutory relief provisions, it will be subject to U.S. federal, state and local income taxes and may be precluded from qualifying as a REIT for the subsequent four taxable years following the year in which it lost its REIT qualification, unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Accordingly, failure to qualify as a REIT could have a material adverse impact on the results of operations and amounts available for distribution to stockholders. The dividends paid deduction of a REIT for qualifying dividends paid to its stockholders is computed using the Company’s taxable income as opposed to net income reported in the consolidated financial statements. Taxable income, generally, will differ from net income reported in the consolidated financial statements because the determination of taxable income is based on tax provisions and not financial accounting principles. The Company has concluded that there was no impact related to uncertain tax provisions from results of operations of the Company for the years ended December 31, 2017 , 2016 and 2015 . The United States of America is the jurisdiction for the Company, and the earliest tax year subject to examination is 2014. Concentration of Credit Risk and Significant Leases As of December 31, 2017 , the Company had cash on deposit, including restricted cash, in certain financial institutions that had deposits in excess of current federally insured levels; however, the Company has not experienced any losses in such accounts. The Company limits its cash investments to financial institutions with high credit standings; therefore, the Company believes it is not exposed to any significant credit risk on its cash deposits. To date, the Company has experienced no loss of or lack of access to cash in its accounts. As of December 31, 2017 , the Company owned real estate investments in 38 MSAs, three of which accounted for 10.0% or more of contractual rental revenue from continuing operations. Real estate investments located in the Houston-The Woodlands-Sugar Land, Texas MSA, the San Antonio-New Braunfels, Texas MSA and the Dallas-Ft. Worth-Arlington, Texas MSA accounted for an aggregate of 21.3% , 10.2% and 10.2% , respectively, of contractual rental revenue from continuing operations for the year ended December 31, 2017 . For the year ended December 31, 2017 , 100.0% , of contractual rental revenue from continuing operations was attributable to the healthcare segment. As of December 31, 2017 , the Company had three exposures to tenant concentration that accounted for 10.0% or more of contractual rental revenue from continuing operations. The leases with Bay Area Regional Medical Center, LLC, Post Acute Medical, LLC and 21st Century Oncology, Inc. accounted for 20.9% , 12.0% and 10.0% , respectively, of contractual rental revenue for the year ended December 31, 2017 . Stock-based Compensation The Company accounts for stock-based compensation based upon the estimated fair value of the share awards. Accounting for stock-based compensation requires the fair value of the share awards to be amortized as compensation expense over the period for which the services relate and requires any dividend equivalents earned to be treated as dividends for financial reporting purposes. See Note 15—"Stock-based Compensation" for a further discussion of stock-based compensation awards. Stockholders’ Equity As of December 31, 2017 , the Company was authorized to issue 350,000,000 shares of stock, of which 300,000,000 shares are designated as common stock at $0.01 par value per share and 50,000,000 shares are designated as preferred stock at $0.01 par value per share. As of December 31, 2017 , the Company had approximately 196,893,000 shares of common stock issued and 186,182,000 shares of common stock outstanding, and no shares of preferred stock issued and outstanding. As of December 31, 2016 , the Company had approximately 189,848,000 shares of common stock issued and 184,910,000 shares of common stock outstanding, and no shares of preferred stock issued and outstanding. The Company’s board of directors may authorize additional shares of capital stock and amend their terms without obtaining stockholder approval. Share Repurchase Program The Company’s share repurchase program allows for repurchases of shares of the Company’s common stock when certain criteria are met. The share repurchase program provides that all repurchases during any calendar year, including those redeemable upon death or a qualifying disability of a stockholder, are limited to those that can be funded with equivalent reinvestments pursuant to the DRIP Offerings during the prior calendar year and other operating funds, if any, as the board of directors, in its sole discretion, may reserve for this purpose. Repurchases of shares of the Company’s common stock are at the sole discretion of the Company’s board of directors. In addition, the Company’s board of directors, in its sole discretion, may amend, suspend, reduce, terminate or otherwise change the share repurchase program upon 30 days ' prior notice to the Company’s stockholders for any reason it deems appropriate. The share repurchase program provides that the Company will limit the number of shares repurchased during any calendar year to 5.0% of the number of shares of common stock outstanding as of December 31st of the previous calendar year. During the year ended December 31, 2017 , the Company received valid repurchase requests related to approximately 5,773,000 shares of common stock, or 3.12% of shares outstanding as of December 31, 2016, all of which were repurchased in full for an aggregate purchase price of approximately $57,049,000 (an average of $9.88 per share). During the year ended December 31, 2016 , the Company received valid repurchase requests related to approximately 3,432,000 shares of common stock, or 1.89% of shares outstanding as of December 31, 2015, all of which were repurchased in full for an aggregate purchase price of approximately $33,335,000 (an average of $9.71 per share). Distribution Policy and Distributions Payable In order to maintain its status as a REIT, the Company is required to make distributions each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends paid deduction and excluding capital gains. To the extent funds are available, the Company intends to continue to pay regular distributions to stockholders. Distributions are paid to stockholders of record as of the applicable record dates. As of December 31, 2017 , the Company had aggregate distributions, since inception, of approximately $509,989,000 ( $241,512,000 in cash and $268,477,000 of which were reinvested in shares of common stock pursuant to the DRIP and the DRIP Offerings). The Company’s distributions declared per common share were $0.70 for the years ended December 31, 2017 , 2016 and 2015 . As of December 31, 2017 , the Company had distributions payable of approximately $11,076,000 . Of those payable distributions, $5,468,000 was paid in cash and $5,608,000 was reinvested in shares of common stock pursuant to the Third DRIP Offering on January 2, 2018 . Distributions to stockholders are determined by the board of directors of the Company and are dependent upon a number of factors relating to the Company, including funds available for the payment of distributions, financial condition, the timing of property acquisitions, capital expenditure requirements, an

Discontinued Operations and Dis

Discontinued Operations and Dispositions	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Dispositions	Discontinued Operations and Dispositions The Company sold 16 properties ( 15 data center properties and one healthcare property), or the 2017 Dispositions, during the year ended December 31, 2017, for an aggregate sale price of $1,153,000,000 and generated net proceeds of $1,131,582,000 . The Company recognized an aggregate gain on sale of $224,133,000 , related to the 15 data center properties sold, as a part of income from discontinued operations on the consolidated statements of comprehensive income for the year ended December 31, 2017. In addition to the 15 data center properties sold during the year ended December 31, 2017, the Company determined that the remaining five data center properties held as of December 31, 2017, were required to be presented as held for sale and ceased depreciation, and were classified as a part of discontinued operations. The Company recognized an impairment loss on real estate in the amount of $5,936,000 , related to one healthcare property sold, as part of net income from continuing operations on the consolidated statements of comprehensive income for the year ended December 31, 2017. Dispositions - Discontinued Operations Disposals that represent a strategic shift that has a major effect on results and operations qualify as discontinued operations. The following table summarizes the 2017 Dispositions that qualify as discontinued operations. The operations related to these assets have been included in discontinued operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 . Property Description Disposition Date Ownership Percentage Chicago Data Center (1) 12/14/2017 100% Richardson Data Center (2) 12/20/2017 100% 180 Peachtree Data Center (2) 12/20/2017 20.53% (3) Northwoods Data Center (2) 12/20/2017 100% Southfield Data Center (2) 12/20/2017 100% Plano Data Center (2) 12/20/2017 100% Arlington Data Center (2) 12/20/2017 100% Philadelphia Data Center (2) 12/20/2017 100% Raleigh Data Center (2) 12/20/2017 100% Leonia Data Center (2) 12/20/2017 100% AT&T Wisconsin Data Center (2) 12/20/2017 100% AT&T Tennessee Data Center (2) 12/20/2017 100% AT&T California Data Center (2) 12/20/2017 100% Charlotte Data Center (2) 12/20/2017 100% Alpharetta Data Center (2) 12/20/2017 100% (1) The Chicago Data Center was sold for aggregate consideration of $315,000,000 . The Company generated net proceeds on the sale of the Chicago Data Center of approximately $310,396,000 . (2) The property was sold as part of a 14 -property portfolio, or the Mapletree Portfolio, for aggregate consideration of $750,000,000 . The Company generated net proceeds on the sale of the Mapletree Portfolio of approximately $733,687,000 . (3) On January 3, 2012, an indirect partially-owned subsidiary of the Operating Partnership purchased the 180 Peachtree Data Center through a consolidated partnership with three unaffiliated institutional investors. The Operating Partnership owned approximately 20.53% and the institutional investors owned an aggregate of 79.47% of the consolidated partnership’s interests. Discontinued Operations Properties The following table presents the major classes of assets and liabilities of properties classified as discontinued operations presented separately in the consolidated balance sheets as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Assets: Real estate: Land $ 21,710 $ 97,111 Buildings and improvements, net 168,557 874,431 Total real estate, net 190,267 971,542 Acquired intangible assets, net 9,617 83,755 Other assets, net 13,949 38,168 Assets of discontinued operations, net $ 213,833 $ 1,093,465 Liabilities: Notes payable, net $ — $ 312,228 Accounts payable due to affiliates 175 236 Accounts payable and other liabilities 3,847 18,210 Intangible lease liabilities, net 1,036 30,731 Liabilities of discontinued operations, net $ 5,058 $ 361,405 The operations reflected in discontinued operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 were as follows (amounts in thousands): For the Year Ended 2017 2016 2015 Revenue: Rental and parking revenue $ 102,274 $ 102,663 $ 103,348 Tenant reimbursement revenue 14,009 14,300 14,520 Total revenue 116,283 116,963 117,868 Expenses: Rental and parking expenses 20,754 20,159 20,046 Change in fair value of contingent consideration (2,920 ) 300 (1,230 ) Acquisition related expenses — — 3 Asset management fees 8,106 8,549 8,405 Depreciation and amortization 32,210 38,744 40,282 Total expenses 58,150 67,752 67,506 Other income (expense): Interest expense, net (20,591 ) (14,532 ) (14,057 ) Total other expense (20,591 ) (14,532 ) (14,057 ) Income from discontinued operations before real estate dispositions and noncontrolling interest 37,542 34,679 36,305 Gain on real estate dispositions 224,133 — — Net income from discontinued operations 261,675 34,679 36,305 Net income from discontinued operations attributable to noncontrolling interests in consolidated partnerships (47,326 ) (3,921 ) (3,029 ) Net income from discontinued operations attributable to common stockholders $ 214,349 $ 30,758 $ 33,276 Capital expenditures on a cash basis for the years ended December 31, 2017, 2016 and 2015 were $2,264,000 , $31,791,000 and $6,621,000 , respectively, related to properties classified within discontinued operations. Dispositions - Continuing Operations The following table summarizes one property sold that qualified as continuing operations. The operations related to this asset have been included in continuing operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 . Property Description Disposition Date Ownership Percentage Miami International Medical Center (1) 12/28/2017 100% (1) The Miami International Medical Center was sold for $88,000,000 . The Company generated net proceeds on the sale of the Miami International Medical Center of $87,499,000 . The net book value of the Miami International Medical Center at disposal was $93,435,000 , consisting of land in the amount of $8,694,000 and building and improvements in the amount of $84,741,000 . The Company recorded an impairment loss on real estate in continuing operations on the Miami International Medical Center of $5,936,000 , based on the contractual sale price (less cost of sale). The Miami International Medical Center was a part of the Company's healthcare segment.

Acquired Intangible Assets, Net

Acquired Intangible Assets, Net	12 Months Ended
	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Acquired Intangible Assets, Net	Acquired Intangible Assets, Net Acquired intangible assets, net, consisted of the following as of December 31, 2017 and 2016 (amounts in thousands, except weighted average life amounts): December 31, 2017 December 31, 2016 In-place leases, net of accumulated amortization of $22,519 and $16,557, respectively (with a weighted average remaining life of 15.1 years and 15.9 years, respectively) $ 83,139 $ 90,567 Above-market leases, net of accumulated amortization of $1,068 and $772, respectively (with a weighted average remaining life of 9.3 years and 10.3 years, respectively) 2,747 3,043 Ground lease interest, net of accumulated amortization of $53 and $40, respectively (with a weighted average remaining life of 87.6 years and 88.6 years, respectively) 1,052 1,065 $ 86,938 $ 94,675 The aggregate weighted average remaining life of the acquired intangible assets was 15.8 years and 16.6 years as of December 31, 2017 and December 31, 2016 , respectively. Amortization of the acquired intangible assets for the years ended December 31, 2017 , 2016 and 2015 was $7,737,000 , $21,446,000 and $9,572,000 , respectively. Amortization of the above-market leases is recorded as an adjustment to rental income, amortization expense for the in-place leases is included in depreciation and amortization and amortization expense for the ground lease interest is included in rental expenses in the accompanying consolidated statements of comprehensive income . Estimated amortization expense on the acquired intangible assets as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 6,473 2019 6,473 2020 6,473 2021 6,473 2022 6,473 Thereafter 54,573 $ 86,938

Intangible Lease Liabilities, N

Intangible Lease Liabilities, Net	12 Months Ended
	Dec. 31, 2017
Intangible Lease Liabilities, Net [Abstract]
Intangible Lease Liabilities, Net	Intangible Lease Liabilities, Net Intangible lease liabilities, net, consisted of the following as of December 31, 2017 and 2016 (amounts in thousands, except weighted average life amounts): December 31, 2017 December 31, 2016 Below-market leases, net of accumulated amortization of $4,269 and $3,391, respectively (with a weighted average remaining life of 17.2 years and 18.0 years, respectively) $ 12,655 $ 13,643 Ground leasehold liabilities, net of accumulated amortization of $425 and $301, respectively (with a weighted average remaining life of 41.2 years and 42.2 years, respectively) 4,900 5,024 $ 17,555 $ 18,667 The aggregate weighted average remaining life of intangible lease liabilities was 23.9 years and 24.5 years as of December 31, 2017 and December 31, 2016 , respectively. Amortization of the intangible lease liabilities for the years ended December 31, 2017 , 2016 and 2015 was $1,112,000 , $1,078,000 and $1,086,000 , respectively. Amortization of below-market leases is recorded as an adjustment to rental income and amortization expense of ground leasehold liabilities is included in rental expenses in the accompanying consolidated statements of comprehensive income . Estimated amortization of the intangible lease liabilities as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 1,017 2019 1,017 2020 1,014 2021 1,014 2022 1,014 Thereafter 12,479 $ 17,555

Other Assets, Net

Other Assets, Net	12 Months Ended
	Dec. 31, 2017
Other Assets [Abstract]
Other Assets, Net	Other Assets, Net Other assets, net consisted of the following as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Deferred financing costs related to the revolver portion of the unsecured credit facility, net of accumulated amortization of $7,428 and $5,833, respectively $ 762 $ 877 Lease commissions, net of accumulated amortization of $63 and $4, respectively 1,266 451 Investments in unconsolidated partnerships 965 113 Tenant receivables, net of allowances for doubtful accounts of $9,125 and $6,007, respectively 7,878 8,430 Notes receivable, net of allowances for loan losses of $16,230 and $4,294, respectively 20,138 15,128 Real estate-related notes receivable — 514 Straight-line rent receivable 36,348 27,611 Restricted cash 10,168 10,636 Derivative assets 407 2,967 Prepaid and other assets 1,208 844 $ 79,140 $ 67,571 Amortization of deferred financing costs related to the revolver portion of the unsecured credit facility for the years ended December 31, 2017 , 2016 and 2015 was $1,595,000 , $2,143,000 and $1,618,000 , respectively, which was recorded as interest expense in the accompanying consolidated statements of comprehensive income . Amortization of lease commissions for the years ended December 31, 2017 , 2016 and 2015 was $59,000 , $99,000 and $34,000 , respectively, which was recorded as depreciation and amortization in the accompanying consolidated statements of comprehensive income . In addition, for the year ended December 31, 2016 , the Company recognized an impairment of one capitalized lease commission by accelerating the amortization in the amount of $1,766,000 , as a result of one tenant experiencing financial difficulties.

Accounts Payable and Other Liab

Accounts Payable and Other Liabilities	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts Payable and Other Liabilities	Accounts Payable and Other Liabilities Accounts payable and other liabilities, as of December 31, 2017 and 2016 , were comprised of the following (amounts in thousands): December 31, 2017 December 31, 2016 Accounts payable and accrued expenses $ 4,203 $ 2,980 Accrued interest expense 1,558 1,776 Accrued property taxes 4,758 3,227 Distributions payable to stockholders 11,076 10,968 Tenant deposits 778 777 Deferred rental income 5,822 1,522 Derivative liabilities — 736 $ 28,195 $ 21,986

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2017
Notes Payable [Abstract]
Notes Payable	Notes Payable The Company had $141,477,000 and $173,427,000 principal outstanding in notes payable collateralized by real estate assets as of December 31, 2017 and 2016 , respectively. The following table summarizes the notes payable balances as of December 31, 2017 and 2016 (amounts in thousands): Interest Rates (1) December 31, 2017 December 31, 2016 Range Weighted Maturity Date Fixed rate notes payable $ 18,212 $ 29,802 4.5% - 4.8% 4.6% 02/28/2018 - 10/11/2018 Variable rate notes payable fixed through interest rate swaps 83,066 102,021 4.8% - 6.3% 6.0% 07/11/2019 - 10/11/2022 Variable rate notes payable 40,199 41,604 4.6% - 5.7% 5.2% 01/26/2019 - 07/11/2019 Total notes payable, principal amount outstanding 141,477 173,427 Unamortized deferred financing costs related to notes payable (875 ) (1,385 ) Total notes payable, net of deferred financing costs (2) $ 140,602 $ 172,042 (1) Range of interest rates and weighted average interest rates are as of December 31, 2017 . (2) As of December 31, 2017 , there were no notes payable related to properties classified as discontinued operations. The balance as of December 31, 2016 excludes $312,228,000 of notes payable, net of deferred financing costs, related to properties classified as discontinued operations, which is included in liabilities of discontinued operations, net on the consolidated balance sheets . As of December 31, 2017 , the notes payable weighted average interest rate was 5.6% . Significant loan activity during the year ended December 31, 2017 , excluding scheduled principal payments, includes: • On February 10, 2017 the Company paid off its debt in connection with one of the Company's notes payable with an outstanding principal balance of $5,645,000 at the time of repayment. The property was subsequently added to the unencumbered pool of the unsecured credit facility. • On June 28, 2017, the Company paid off its debt in connection with one of the Company's notes payable with an outstanding principal balance of $5,337,000 at the time of repayment. The property was subsequently added to the unencumbered pool of the unsecured credit facility. • On August 18, 2017, the Company paid off its debt in connection with one of the Company's notes payable with an outstanding principal balance of $15,162,000 at the time of repayment. The property was subsequently added to the unencumbered pool of the unsecured credit facility. • During the year ended December 31, 2017 , the Company paid off its debt in connection with the disposition of six data center properties with an outstanding principal balance of $307,315,000 at the time of repayment, which resulted in a loss on debt extinguishment of $7,287,000 included in income from discontinued operations on the consolidated statements of comprehensive income . The principal payments due on the notes payable as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 23,147 (1) 2019 101,141 2020 597 2021 629 2022 15,963 Thereafter — $ 141,477 (1) Of this amount, $12,371,000 relates to a loan agreement that was repaid at maturity on February 28, 2018 .

Unsecured Credit Facility

Unsecured Credit Facility	12 Months Ended
	Dec. 31, 2017
Line of Credit Facility [Abstract]
Unsecured Credit Facility	Unsecured Credit Facility As of December 31, 2017 , the maximum commitments available under the unsecured credit facility were $610,000,000 , consisting of a $400,000,000 revolving line of credit, with a maturity date of May 28, 2018 , subject to the Operating Partnership’s right to two 12 -month extensions, a $75,000,000 term loan, with a maturity date of May 28, 2018 , subject to the Operating Partnership’s right to a 12 -month extension, and an additional $135,000,000 term loan, with a maturity date of August 21, 2020 . The lenders agreed to make the loans on an unsecured basis. The unsecured credit facility, shall bear interest at per annum rates equal to, at the Operating Partnership's option, either (a) the London Interbank Offered Rate, or LIBOR, plus an applicable margin ranging from 1.75% to 2.25% , which is determined by the overall leverage of the Operating Partnership; or (b) a base rate, which means, for any day, a fluctuating rate per annum equal to the prime rate for such day, plus an applicable margin ranging from 0.75% to 1.25% , which is determined based on the overall leverage of the Operating Partnership. Additionally, the requirement to pay a fee on the unused portion of the lenders’ commitments under the unsecured credit facility is 0.25% per annum if the average daily amount outstanding under the unsecured credit facility is less than 50% of the lenders’ commitments, and 0.15% per annum if the average daily amount outstanding under the unsecured credit facility is greater than 50% of the lenders’ commitments. The unused fee is payable quarterly in arrears. The actual amount of credit available under the unsecured credit facility is a function of certain loan-to-cost, loan-to-value, debt yield and debt service coverage ratios contained in the unsecured credit facility agreements. The unencumbered pool availability under the unsecured credit facility is equal to the maximum principal amount of the value of the assets that are included in the unencumbered pool. The unsecured credit facility agreement contains various affirmative and negative covenants that are customary for credit facilities and transactions of this type, including limitations on the incurrence of debt and limitations on distributions by the Company, the Operating Partnership and its subsidiaries in the event of default. The unsecured credit facility agreement imposes the following financial covenants: (i) maximum ratio of consolidated total indebtedness to gross asset value; (ii) minimum ratio of adjusted consolidated earnings before interest, taxes, depreciation and amortization to consolidated fixed charges; (iii) minimum tangible net worth; (iv) minimum weighted average remaining lease term of unencumbered pool properties in the unencumbered pool; (v) minimum number of unencumbered pool properties in the unencumbered pool; and (vi) minimum unencumbered pool actual debt service coverage ratio. In addition, the unsecured credit facility agreement includes events of default that are customary for credit facilities and transactions of this type. The Company was in compliance with all financial covenant requirements at December 31, 2017 . The credit available to the Operating Partnership under the unsecured credit facility will be a maximum principal amount of the value of the assets that are included in the unencumbered pool. The Company had $0 and $358,000,000 in principal outstanding on its unsecured credit facility as of December 31, 2017 and 2016 , respectively. The following table summarizes the unsecured credit facility balances as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Revolving line of credit $ — $ 148,000 Term loan — 210,000 Total unsecured credit facility, principal amount outstanding — 358,000 Unamortized deferred financing costs related to the term loan of the unsecured credit facility — (1,789 ) Total unsecured credit facility, net of deferred financing costs $ — $ 356,211 Significant credit facility activities during the year ended December 31, 2017 include: • On January 31, 2017, the Operating Partnership and certain of the Company’s subsidiaries entered into an amendment related to the unsecured credit facility to extend the maturity date and modify the extension options of the revolving line of credit portion of the unsecured credit facility. In connection with the amendment to the unsecured credit facility, the maturity date of the revolving line of credit was changed from May 28, 2017 to May 28, 2018 , subject to the Operating Partnership's right to two 12 -month extension periods (the Operating Partnership previously had a right to one 12 -month extension period). • During the year ended December 31, 2017 , the Company added three properties to the unencumbered pool of the unsecured credit facility, which increased the Company's total unencumbered pool availability under the unsecured credit facility by approximately $21,906,000 . • During the year ended December 31, 2017 , the Company removed 29 properties from the unencumbered pool of the unsecured credit facility. Out of 29 properties, a portfolio of 20 healthcare properties was removed due to a tenant undergoing a restructuring of its liabilities and nine data center properties were removed due to a sale of a data center portfolio that occurred on December 21, 2017. As a result of removing 29 properties from the unencumbered pool of the unsecured credit facility, the total unencumbered pool availability decreased by approximately $184,813,000 . • During the year ended December 31, 2017 , the Company made a draw of $121,000,000 and repaid $479,000,000 on its unsecured credit facility with net proceeds from the 2017 Dispositions. In connection with the payoff of the unsecured credit facility, the Company recognized a gain on the debt extinguishment of $2,774,000 included in interest expense, net on the consolidated statements of comprehensive income . • As of December 31, 2017 , the Company had a total unencumbered pool availability under the unsecured credit facility of $353,606,000 , which was limited to $236,667,000 due to one covenant restriction and an aggregate outstanding principal balance of $0 . As of December 31, 2017 , $236,667,000 was available to be drawn on the unsecured credit facility. • On February 1, 2018, the Operating Partnership and certain of the Company's subsidiaries entered into an amended and restated credit agreement related to the unsecured credit facility. See Note 20—"Subsequent Events" for additional details.

Related-Party Transactions and

Related-Party Transactions and Arrangements	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related-Party Transactions and Arrangements	Related-Party Transactions and Arrangements The Company pays the Advisor an annual asset management fee of 0.85% of the aggregate asset value plus costs and expenses incurred by the Advisor in providing asset management services. The fee is payable monthly in an amount equal to 0.07083% of the aggregate asset value as of the last day of the immediately preceding month. For the years ended December 31, 2017 , 2016 and 2015 , the Company incurred $18,717,000 , $19,505,000 and $18,027,000 , respectively, in asset management fees to the Advisor, of which $10,611,000 , $10,956,000 and $9,622,000 are included in continuing operations, respectively. The Company reimburses the Advisor for all expenses it paid or incurred in connection with the services provided to the Company, subject to certain limitations. The Company will not reimburse the Advisor for personnel costs in connection with services for which the Advisor receives an acquisition and advisory fee or a disposition fee. For the years ended December 31, 2017 , 2016 and 2015 , the Advisor allocated $1,598,000 , $1,793,000 and $1,338,000 , respectively, in operating expenses incurred on the Company’s behalf, which are recorded in general and administrative expenses in the accompanying consolidated statements of comprehensive income . The Company has no direct employees. The employees of the Advisor and other affiliates provide services to the Company related to acquisitions, property management, asset management, accounting, investor relations, and all other administrative services. If the Advisor or its affiliates provides a substantial amount of services, as determined by a majority of the Company’s independent directors, in connection with the sale of one or more assets, the Company will pay the Advisor a disposition fee equal to an amount of up to the lesser of 0.5% of the transaction price and one-half of the fees paid in the aggregate to third party investment bankers for such transaction. In no event will the combined real estate commission paid to the Advisor, its affiliates and unaffiliated third parties exceed 6.0% of the contract sales price. In addition, after investors have received a return on their net capital contributions and an 8.0% cumulative non-compounded annual return, then the Advisor is entitled to receive 15.0% of the remaining net sale proceeds, or a subordinated participation in net sale proceeds. During the year ended December 31, 2017 , in connection with the 2017 Dispositions, the Company incurred approximately $4,311,000 in disposition fees to the Advisor or its affiliates, which are recorded in income from discontinued operations in the accompanying consolidated statements of comprehensive income. As of December 31, 2017, the Company has not incurred a subordinated participation in net sale proceeds. Upon the listing of the Company’s common stock on a national securities exchange, the Company will pay the Advisor a subordinated incentive listing fee equal to 15.0% of the amount by which the market value of the Company’s outstanding stock plus all distributions paid by the Company prior to listing exceeds the sum of the total amount of capital raised from investors and the amount of cash flow necessary to generate an 8.0% cumulative, non-compounded annual return to investors, or a subordinated incentive listing fee. As of December 31, 2017 , the Company has not incurred a subordinated incentive listing fee. Upon termination or non-renewal of the Advisory Agreement, with or without cause, the Advisor will be entitled to receive distributions from the Operating Partnership equal to 15.0% of the amount by which the sum of the Company’s adjusted market value plus distributions exceeds the sum of the aggregate capital contributed by investors plus an amount equal to an annual 8.0% cumulative, non-compounded return to investors. In addition, the Advisor may elect to defer its right to receive a subordinated distribution upon termination until either shares of the Company’s common stock are listed and traded on a national securities exchange or another liquidity event occurs. As of December 31, 2017 , the Company has not incurred any subordinated distribution upon termination fees to the Advisor or its affiliates. The Company pays Carter Validus Real Estate Management Services, LLC, or the Property Manager, leasing and property management fees for the Company’s properties. Such fees equal 3.0% of monthly gross revenues from single-tenant properties and 4.0% of monthly gross revenues from multi-tenant properties. The Company will reimburse the Property Manager and its affiliates for property-level expenses that any of them pay or incur on the Company’s behalf, including salaries, bonuses and benefits of persons employed by the Property Manager and its affiliates, except for the salaries, bonuses and benefits of persons who also serve as one of the Company’s executive officers. The Property Manager and its affiliates may subcontract the performance of their duties to third parties and pay all or a portion of the property management fee to the third parties with whom they contract for these services. If the Company contracts directly with third parties for such services at customary market fees, the Company may pay the Property Manager an oversight fee equal to 1.0% of the gross revenues of the property managed. In no event will the Company pay the Property Manager, the Advisor or its affiliates both a property management fee and an oversight fee with respect to any particular property. The Company will pay the Property Manager a separate fee for the one-time initial rent-up, lease renewals or leasing-up of newly constructed properties. For the years ended December 31, 2017 , 2016 and 2015 , the Company incurred $5,056,000 , $5,425,000 and $4,811,000 , respectively, in property management fees to the Property Manager, of which $2,542,000 , $2,945,000 and $2,371,000 , respectively, are included in continuing operations and recorded in rental expenses in the accompanying consolidated statements of comprehensive income . For the years ended December 31, 2017 , 2016 and 2015 , the Company incurred $644,000 , $1,138,000 and $2,934,000 , respectively, in leasing commissions to the Property Manager. Leasing commissions are capitalized in other assets, net in the accompanying consolidated balance sheets . For acting as general contractor and/or construction manager to supervise or coordinate projects or to provide major repairs or rehabilitation on our properties, the Company may pay the Property Manager up to 5.0% of the cost of the projects, repairs and/or rehabilitation, as applicable, or construction management fees. For the years ended December 31, 2017 , 2016 and 2015 , the Company incurred $524,000 , $986,000 and $2,058,000 , respectively, in construction management fees to the Property Manager. Construction management fees are capitalized in buildings and improvements in the accompanying consolidated balance sheets . Accounts Payable Due to Affiliates The following amounts were due to affiliates as of December 31, 2017 and 2016 (amounts in thousands): Entity Fee December 31, 2017 December 31, 2016 Carter/Validus Advisors, LLC and its affiliates Asset management fees $ 980 $ 1,604 Carter Validus Real Estate Management Services, LLC Property management fees 473 593 Carter/Validus Advisors, LLC and its affiliates General, administrative and other costs 98 167 Carter/Validus Advisors, LLC and its affiliates Disposition fees 440 — Carter Validus Real Estate Management Services, LLC Construction management fees 17 35 Carter Validus Real Estate Management Services, LLC Leasing commissions 364 — $ 2,372 $ 2,399

Future Minimum Rent

Future Minimum Rent	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Future Minimum Rent	Future Minimum Rent Rental Income The Company’s real estate assets are leased to tenants under operating leases with varying terms. The leases frequently have provisions to extend the lease agreements. The Company retains substantially all of the risks and benefits of ownership of the real estate assets leased to tenants. The future minimum rent to be received from the Company’s investments in real estate assets under non-cancelable operating leases, including properties qualified as discontinued operations and optional renewal periods for which exercise is reasonably assured, as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 95,549 2019 96,768 2020 97,245 2021 99,164 2022 100,854 Thereafter 961,507 $ 1,451,087 Rental Expense The Company has ground lease obligations that generally require fixed annual rental payments and may also include escalation clauses and renewal options. The future minimum rent obligations under non-cancelable ground leases as of December 31, 2017 and for each of the next five years ended December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 644 2019 688 2020 688 2021 688 2022 688 Thereafter 33,848 $ 37,244

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Notes payable – Fixed Rate —The estimated fair value of notes payable – fixed rate measured using observable inputs from similar liabilities (Level 2) was approximately $18,189,000 and $29,683,000 as of December 31, 2017 and December 31, 2016 , respectively, as compared to the outstanding principal of $18,212,000 and $29,802,000 as of December 31, 2017 and December 31, 2016 , respectively. The estimated fair value of notes payable – variable rate fixed through interest rate swap agreements (Level 2) was approximately $82,533,000 and $104,006,000 as of December 31, 2017 and December 31, 2016 , respectively, as compared to the outstanding principal of $83,066,000 and $102,021,000 as of December 31, 2017 and December 31, 2016 , respectively. Notes payable – Variable —The outstanding principal of the notes payable – variable was $40,199,000 and $41,604,000 as of December 31, 2017 and December 31, 2016 , respectively, which approximated its fair value. The fair value of the Company's variable rate notes payable is estimated based on the interest rates currently offered to the Company by financial institutions. Unsecured credit facility —The outstanding principal balance of the unsecured credit facility – variable was $0 and $148,000,000 , which approximated its fair value, as of December 31, 2017 and December 31, 2016 , respectively. The estimated fair value of the unsecured credit facility – variable rate fixed through interest rate swap agreements (Level 2) was approximately $0 and $203,055,000 as of December 31, 2017 and December 31, 2016 , respectively, as compared to the outstanding principal of $0 and $210,000,000 as of December 31, 2017 and December 31, 2016 , respectively. Notes receivable —The outstanding principal balance of the notes receivable approximated the fair value as of December 31, 2017 and 2016. The fair value of the Company’s notes receivable is estimated using significant unobservable inputs not based on market activity, but rather through particular valuation techniques (Level 3). The fair value was measured based on the income approach valuation methodology, which requires certain judgments to be made by management. Derivative instruments — Considerable judgment is necessary to develop estimated fair values of financial instruments. Accordingly, the estimates presented herein are not necessarily indicative of the amount the Company could realize, or be liable for, on disposition of the financial instruments. The Company has determined that the majority of the inputs used to value its interest rate swaps fall within Level 2 of the fair value hierarchy. The credit valuation adjustments associated with these instruments utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by the Company and the respective counterparty. However, as of December 31, 2017 , the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions, and has determined that the credit valuation adjustments are not significant to the overall valuation of its interest rate swaps. As a result, the Company determined that its interest rate swaps valuation in its entirety is classified in Level 2 of the fair value hierarchy. See Note 13—"Derivative Instruments and Hedging Activities" for a further discussion of the Company’s derivative instruments. Real estate assets — During the year ended December 31, 2017, real estate assets related to four properties with an aggregate carrying amount of $85,768,000 were deemed to be impaired and their carrying values were reduced to their estimated fair values of $52,557,000 . The fair value of the Company's impaired real estate assets are estimated using significant unobservable inputs not based on market activity, but rather through particular valuation techniques (Level 3). The Company used a discounted cash flow and market valuation approach, which required certain judgments to be made by management. The following table shows the fair value of the Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Total Fair Assets: Derivative assets (1) $ — $ 407 $ — $ 407 Total assets at fair value $ — $ 407 $ — $ 407 December 31, 2016 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Total Fair Assets: Derivative assets (2) $ — $ 3,070 $ — $ 3,070 Total assets at fair value $ — $ 3,070 $ — $ 3,070 Liabilities: Derivative liabilities (3) $ — $ (1,247 ) $ — $ (1,247 ) Contingent consideration obligation (4) — — (5,640 ) (5,640 ) Total liabilities at fair value $ — $ (1,247 ) $ (5,640 ) $ (6,887 ) (1) Entire amount attributable to continuing operations. (2) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. Derivative assets attributable to continuing operations and discontinued operations are reported in other assets, net and assets of discontinued operations, net, respectively, on the consolidated balance sheets . (3) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. Derivative liabilities attributable to continuing operations and discontinued operations are reported in accounts payable and other liabilities and liabilities of discontinued operations, net, respectively, on the consolidated balance sheets . (4) Entire amount attributable to discontinued operations. The following table shows the fair value of the Company's real estate assets measured at fair value on a non-recurring basis as of December 31, 2017 (amounts in thousands): December 31, 2017 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Re-Measured Balance Total Losses Real estate assets (1) $ — $ — $ 52,557 (2) $ 52,557 $ (33,211 ) (1) Amount represents the aggregate fair value of real estate assets impacted by impairment charges as of December 31, 2017. (2) The fair values relating to impairment assessments were based on a discounted cash flow model and a market approach model to value real properties, using comparable properties adjusted for differences in characteristics to estimate the fair value. Projected cash flows are comprised of projected rental revenues and expenses based upon market conditions and expectations for growth. Terminal capitalization rates, discount rates, market rate per square foot and annual growth rates utilized in these models are based on a reasonable range of current market rates for each property analyzed. Based upon these inputs, the Company determined that its valuations of properties using a discounted cash flow model and a market approach model are classified within Level 3 of the fair value hierarchy. The following table sets forth quantitative information about the unobservable inputs of the Company’s Level 3 real estate recorded as of December 31, 2017 : Unobservable Inputs December 31, 2017 Terminal capitalization rate 8.5% Discount rate 8.7% Comparable sale price per square foot (1) $180 - $247 Market rental rate per square foot $37 Annual growth rate 2.0% (1) The comparable sale price per square foot is used under the market approach. The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): For the Year Ended 2017 2016 2015 Liabilities: Contingent consideration obligation: Beginning balance $ 5,640 $ 5,340 $ 6,570 Release of contingent consideration obligation related to property disposition (2,720 ) — — Total changes in fair value included in income from discontinued operations (2,920 ) 300 (1,230 ) Ending balance $ — $ 5,640 $ 5,340 Unrealized (gains) losses still held $ — $ — $ —

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable rate amounts from a counterparty in exchange for the Company making fixed rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of derivatives designated, and that qualify, as cash flow hedges is recorded in accumulated other comprehensive income (loss) in the accompanying consolidated statements of stockholders' equity and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the year ended December 31, 2017 , such derivatives were used to hedge the variable cash flows associated with variable rate debt. The ineffective portion of changes in fair value of the derivatives is recognized directly in earnings. During the year ended December 31, 2017, the Company accelerated the reclassification of amounts in other comprehensive income (loss) to earnings as a result of hedged forecasted transactions becoming probable not to occur due to debt extinguishment related to the disposition of properties. The accelerated amount was a gain of $4,637,000 , of which $3,755,000 was recorded in interest expense, net and $882,000 was recorded in income from discontinued operations in the accompanying consolidated statements of comprehensive income . During the year ended December 31, 2016 , the Company accelerated the reclassification of amounts in other comprehensive income (loss) to earnings as a result of a hedged forecasted transaction becoming probable not to occur due to a related debt extinguishment. The accelerated amount was a loss of $728,000 , which was recorded in interest expense, net in the accompanying consolidated statements of comprehensive income . During the year ended December 31, 2015, no gains or losses were recognized due to ineffectiveness of hedges of interest rate risk. Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s variable rate debt. During the next twelve months, the Company estimates that an additional $100,000 will be reclassified from accumulated other comprehensive income (loss) as a decrease to interest expense. See Note 12—"Fair Value" for a further discussion of the fair value of the Company’s derivative instruments. The following table summarizes the notional amount and fair value of the Company’s derivative instruments (amounts in thousands): Derivatives Balance Effective Maturity December 31, 2017 December 31, 2016 Outstanding (2) Fair Value of Outstanding (3) Fair Value of Asset (2) (Liability) Asset (4) (Liability) (5) Interest rate swaps (1) 07/11/2014 to 05/28/2019 to $ 121,066 $ 407 $ — $ 540,425 $ 3,070 $ (1,247 ) (1) Derivative assets attributable to continuing operations and discontinued operations are reported in other assets, net and assets of discontinued operations, net, respectively, on the consolidated balance sheets . Derivative liabilities attributable to continuing operations and discontinued operations are reported in accounts payable and other liabilities and liabilities of discontinued operations, net, respectively, on the consolidated balance sheets . (2) Entire amount is attributable to continuing operations. (3) Of this amount, $312,021,000 is attributable to continuing operations and $228,404,000 is attributable to discontinued operations. (4) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (5) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. The notional amount under the agreements is an indication of the extent of the Company’s involvement in each instrument at the time, but does not represent exposure to credit, interest rate or market risks. Accounting for changes in the fair value of a derivative instrument depends on the intended use and designation of the derivative instrument. The Company designated the interest rate swaps as cash flow hedges to hedge the variability of the anticipated cash flows on its variable rate notes payable. The change in fair value of the effective portion of the derivative instrument that is designated as a hedge is recorded in other comprehensive income (loss), or OCI, in the accompanying consolidated statements of comprehensive income . The table below summarizes the amount of income and loss recognized on interest rate derivatives designated as cash flow hedges for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Derivatives in Cash Flow Hedging Relationships Amount of Income (Loss) Recognized Location Of Loss (Income) Amount of Income (Loss) For the Year Ended December 31, 2017 Interest rate swaps - continuing operations $ 1,310 Interest expense, net $ 3,353 Interest rate swaps - discontinued operations 752 Income from discontinued operations 125 Total $ 2,062 $ 3,478 For the Year Ended December 31, 2016 Interest rate swaps - continuing operations $ 1,045 Interest expense, net $ (2,764 ) Interest rate swaps - discontinued operations (1,562 ) Income from discontinued operations (2,156 ) Total $ (517 ) $ (4,920 ) For the Year Ended December 31, 2015 Interest rate swaps - continuing operations $ (2,905 ) Interest expense, net $ (2,408 ) Interest rate swaps - discontinued operations (2,475 ) Income from discontinued operations (1,927 ) Total $ (5,380 ) $ (4,335 ) Credit Risk-Related Contingent Features The Company has agreements with each of its derivative counterparties that contain cross-default provisions, whereby if the Company defaults on certain of its unsecured indebtedness, then the Company could also be declared in default on its derivative obligations, resulting in an acceleration of payment thereunder. In addition, the Company has agreements with each of its derivative counterparties that contain a provision where if the Company either defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. The Company records credit risk valuation adjustments on its interest rate swaps based on the respective credit quality of the Company and the counterparty. The Company believes it mitigates its risk by entering into agreements with creditworthy counterparties. As of December 31, 2017 , the fair value of derivatives in a net liability position, including accrued interest but excluding any adjustment for nonperformance risk related to these agreements, was $0 . Tabular Disclosure Offsetting Derivatives The Company has elected not to offset derivative positions in its consolidated financial statements. The following table presents the effect on the Company’s financial position had the Company made the election to offset its derivative positions as of December 31, 2017 and 2016 (amounts in thousands): Offsetting of Derivative Assets Gross Amounts Not Offset Gross Gross Amounts Net Amounts of Financial Cash Net December 31, 2017 (1) $ 407 $ — $ 407 $ — $ — $ 407 December 31, 2016 $ 3,070 (2) $ — $ 3,070 (2) $ (10 ) (1) $ — $ 3,060 (3) Offsetting of Derivative Liabilities Gross Amounts Not Offset Gross Gross Amounts Net Amounts of Financial Cash Net December 31, 2017 $ — $ — $ — $ — $ — $ — December 31, 2016 $ 1,247 (4) $ — $ 1,247 (4) $ (10 ) (1) $ — $ 1,237 (5) (1) Entire amount is attributable to continuing operations. (2) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (3) Of this amount, $2,957,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (4) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. (5) Of this amount, $726,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. The Company reports derivative assets attributable to continuing operations and discontinued operations as other assets, net and assets of discontinued operations, net, respectively, on the consolidated balance sheets . The Company reports derivative liabilities attributable to continuing operations and discontinued operations as accounts payable and other liabilities and liabilities of discontinued operations, net, respectively, on the consolidated balance sheets .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table presents a rollforward of amounts recognized in accumulated other comprehensive income (loss), net of noncontrolling interests, by component for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Unrealized Income (Loss) on Derivative Accumulated Other Balance as of December 31, 2014 $ (1,161 ) $ (1,161 ) Other comprehensive loss before reclassification (5,042 ) (5,042 ) Amount of loss reclassified from accumulated other comprehensive income (loss) to net income (effective portion) 4,103 4,103 Other comprehensive loss (939 ) (939 ) Purchase of noncontrolling interests — (480 ) Balance as of December 31, 2015 (2,100 ) (2,580 ) Other comprehensive loss before reclassification (517 ) (517 ) Amount of loss reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast) 4,920 4,920 Other comprehensive income 4,403 4,403 Balance as of December 31, 2016 2,303 1,823 Other comprehensive income before reclassification 2,062 2,062 Amount of income reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast) (3,478 ) (3,478 ) Other comprehensive loss (1,416 ) (1,416 ) Balance as of December 31, 2017 $ 887 $ 407 The following table presents reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Details about Accumulated Other Amounts Reclassified from Affected Line Items in the Consolidated Statements of Comprehensive For the Year Ended 2017 2016 2015 Interest rate swap contracts - continuing operations $ (3,353 ) $ 2,764 $ 2,408 Interest expense, net Interest rate swap contracts - discontinued operations (125 ) 2,156 1,927 Income from discontinued operations Interest rate swap contracts $ (3,478 ) $ 4,920 $ 4,335

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	Stock-based Compensation The Company, pursuant to the 2010 Restricted Share Plan, or the 2010 Plan, has the authority to grant restricted and deferred stock awards to persons eligible under the 2010 Plan. The Company authorized and reserved 300,000 shares of its common stock for issuance under the 2010 Plan, subject to certain adjustments. Subject to certain limited exceptions, restricted stock may not be sold, assigned, transferred, pledged, hypothecated or otherwise disposed of and is subject to forfeiture within the vesting period. Restricted stock awards generally vest ratably over four years . The Company uses the straight-line method to recognize expenses for service awards with graded vesting. Restricted stock awards are entitled to receive dividends during the vesting period. In addition to the ratable amortization of fair value over the vesting period, dividends paid on unvested shares of restricted stock, which are not expected to vest, are charged to compensation expense in the period paid. On August 18, 2017, the Company awarded an aggregate of 9,000 shares of restricted stock to its independent board members in connection with their re-election to the board of directors of the Company. The fair value of each share of restricted common stock that has been granted under the 2010 Plan is estimated at the date of grant at $10.02 per share. The restricted stock awards vest over a period of four years . The awards are amortized using the straight-line method over four years. As of December 31, 2017 and 2016 , there was $180,000 and $179,000 , respectively, of total unrecognized compensation expense related to nonvested shares of our restricted common stock. This expense is expected to be recognized over a remaining weighted average period of 2.03 years . This expected expense does not include the impact of any future stock-based compensation awards. As of December 31, 2017 and 2016 , the fair value of the nonvested shares of restricted common stock was $208,350 and $225,000 , respectively. A summary of the status of the nonvested shares of restricted common stock as of December 31, 2016 and the changes for the year ended December 31, 2017 is presented below: Restricted Stock Shares Nonvested at December 31, 2016 22,500 Vested (9,000 ) Granted 9,000 Nonvested at December 31, 2017 22,500 Stock-based compensation expense for the years ended December 31, 2017 , 2016 and 2015 was $88,000 , $90,000 and $90,000 , respectively, which is reported in general and administrative costs in the accompanying consolidated statements of comprehensive income .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes As a REIT, the Company generally will not be subject to U.S. federal income tax on taxable income that it distributes to the stockholders. For U.S. federal income tax purposes, distributions to stockholders are characterized as either ordinary dividends, capital gain distributions, or nontaxable distributions. Nontaxable distributions will reduce U.S. stockholders’ respective bases in their shares. The following table shows the character of distributions the Company paid on a percentage basis during the years ended December 31, 2017 , 2016 and 2015 : For the Year Ended December 31, Character of Distributions: 2017 2016 2015 Ordinary dividends — % 45.45 % 46.69 % Capital gain distributions 100.00 % 3.20 % — % Nontaxable distributions — % 51.35 % 53.31 % Total 100.00 % 100.00 % 100.00 % As a REIT, if the Company fails to distribute in any calendar year (subject to specific timing rules for certain dividends paid in January) at least the sum of (i) 85% of its ordinary income for such year, (ii) 95% of its capital gain net income for such year, and (iii) any undistributed taxable income from the prior year, the Company would be subject to a non-deductible 4% excise tax on the excess of such required distribution over the amounts actually distributed. During the year ended December 31, 2017, the Company incurred approximately $641,000 federal excise tax, which is included in general and administrative expenses in the accompanying consolidated statements of comprehensive income . The Company is subject to certain state and local income taxes on its income, property or net worth in some jurisdictions. Texas, Tennessee, Louisiana and Massachusetts are the major state and local tax jurisdictions for the Company. The Company applies the rules under ASC 740-10, Accounting for Uncertainty in Income Taxes , for uncertain tax positions using a “more likely than not” recognition threshold for tax positions. Pursuant to these rules, the financial statement effects of a tax position are initially recognized when it is more likely than not, based on the technical merits of the tax position, that such a position will be sustained upon examination by the relevant tax authorities. If the tax benefit meets the “more likely than not” threshold, the measurement of the tax benefit will be based on the Company's estimate of the ultimate tax benefit to be sustained if audited by the taxing authority. The Company concluded there was no impact related to uncertain tax positions from the results of the operations of the Company for the years ended December 31, 2017 , 2016 and 2015 . The earliest tax year subject to examination is 2014. The Company’s policy is to recognize accrued interest related to unrecognized tax benefits as a component of interest expense and penalties related to unrecognized tax benefits as a component of general and administrative expenses. From inception through December 31, 2017 , the Company has not recognized any interest expense or penalties related to unrecognized tax benefits.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation In the ordinary course of business, the Company may become subject to litigation or claims. As of December 31, 2017 , there were, and currently there are, no material pending legal proceedings to which the Company is a party. W hile the resolution of a lawsuit or proceeding may have an impact to our financial results for the period in which it is resolved, we believe that the final disposition of the lawsuits or proceedings in which we are currently involved, either individually or in the aggregate, will not have a material adverse effect on our financial position, results of operations or liquidity.

Economic Dependency

Economic Dependency	12 Months Ended
	Dec. 31, 2017
Economic Dependency [Abstract]
Economic Dependency	Economic Dependency The Company is dependent on the Advisor and its affiliates for certain services that are essential to the Company, including the identification, evaluation, negotiation, purchase and disposition of real estate investments and other investments; the management of the daily operations of the Company’s real estate portfolio; and other general and administrative responsibilities. In the event that the Advisor or its affiliates are unable to provide the respective services, the Company will be required to obtain such services from other sources.

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 in the following table is a summary of the unaudited quarterly financial information for the years ended December 31, 2017 and 2016 . The Company believes that all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts stated below to present fairly, and in accordance with GAAP, the selected quarterly information (amounts in thousands, except shares and per share data): 2017 Fourth Third Second First Total revenue $ 22,984 $ 23,857 $ 25,877 $ 21,696 Total expenses (19,237 ) (15,263 ) (15,058 ) (14,849 ) Income from operations 3,747 8,594 10,819 6,847 Other expense (41,210 ) (12,286 ) (6,497 ) (7,052 ) (Loss) income from continuing operations (37,463 ) (3,692 ) 4,322 (205 ) Income from discontinued operations 231,964 10,636 8,886 10,189 Net income 194,501 6,944 13,208 9,984 Less: Net income attributable to noncontrolling interests in consolidated partnerships (44,308 ) (898 ) (1,039 ) (1,081 ) Net income attributable to common stockholders $ 150,193 $ 6,046 $ 12,169 $ 8,903 Net income (loss) per common share attributable to common stockholders: Basic: Continuing operations $ (0.21 ) $ (0.02 ) $ 0.03 $ — Discontinued operations 1.01 0.05 0.04 0.05 Net income attributable to common stockholders $ 0.80 $ 0.03 $ 0.07 $ 0.05 Diluted: Continuing operations $ (0.21 ) $ (0.02 ) $ 0.03 $ — Discontinued operations 1.01 0.05 0.04 0.05 Net income attributable to common stockholders $ 0.80 $ 0.03 $ 0.07 $ 0.05 Weighted average number of common shares outstanding: Basic 186,182,196 186,295,970 185,897,525 185,300,384 Diluted 186,182,196 186,295,970 185,911,968 185,300,384 2016 Fourth Third Second First Total revenue $ 18,901 $ 13,573 $ 29,915 $ 27,848 Total expenses (16,543 ) (29,102 ) (16,199 ) (13,593 ) Income (loss) from operations 2,358 (15,529 ) 13,716 14,255 Other expense (3,110 ) (2,983 ) (4,249 ) (3,980 ) (Loss) income from continuing operations (752 ) (18,512 ) 9,467 10,275 Income from discontinued operations 8,897 9,018 8,447 8,317 Net income (loss) 8,145 (9,494 ) 17,914 18,592 Less: Net income attributable to noncontrolling interests in consolidated partnerships (926 ) (1,006 ) (1,061 ) (928 ) Net income (loss) attributable to common stockholders $ 7,219 $ (10,500 ) $ 16,853 $ 17,664 Net income (loss) per common share attributable to common stockholders: Basic: Continuing operations $ — $ (0.10 ) $ 0.05 $ 0.06 Discontinued operations 0.04 0.04 0.04 0.04 Net income (loss) attributable to common stockholders $ 0.04 $ (0.06 ) $ 0.09 $ 0.10 Diluted: Continuing operations $ — $ (0.10 ) $ 0.05 $ 0.06 Discontinued operations 0.04 0.04 0.04 0.04 Net income (loss) attributable to common stockholders $ 0.04 $ (0.06 ) $ 0.09 $ 0.10 Weighted average number of common shares outstanding: Basic 184,628,066 183,726,479 182,743,182 181,975,405 Diluted 184,628,066 183,726,479 182,762,094 181,992,093

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Distributions Paid On January 2, 2018 , the Company paid aggregate distributions of $11,076,000 ( $5,468,000 in cash and $5,608,000 in shares of the Company’s common stock issued pursuant to the DRIP Offering), which related to distributions declared for each day in the period from December 1, 2017 through December 31, 2017. On January 22, 2018, the board of directors of the Company declared a special cash distribution of $3.00 per share of common stock. The special cash distribution was funded from the proceeds from the disposition of certain real estate properties between December 2017 and January 2018. The special cash distribution was paid on March 16, 2018 to stockholders of record at the close of business on February 15, 2018 in the amount of approximately $556,227,000 . On February 1, 2018, the Company paid aggregate distributions of $11,088,000 ( $5,541,000 in cash and $5,547,000 in shares of the Company’s common stock issued pursuant to the DRIP Offering), which related to distributions declared for each day in the period from January 1, 2018 through January 31, 2018. On March 1, 2018, the Company paid aggregate distributions of $9,994,000 ( $5,093,000 in cash and $4,901,000 in shares of the Company’s common stock issued pursuant to the DRIP Offering), which related to distributions declared for each day in the period from February 1, 2018 through February 28, 2018. Distributions Declared On January 22, 2018, the board of directors of the Company approved and declared a distribution to the Company’s stockholders of record as of the close of business on each day of the period commencing on March 1, 2018 and ending on May 31, 2018. The distributions will be calculated based on 365 days in the calendar year and will be equal to $0.001150685 per share of common stock, which will be equal to an annualized distribution rate of 6.7% , based on the estimated per share NAV of $6.26 . The distributions declared for each record date in March 2018, April 2018 and May 2018 will be paid in April 2018, May 2018 and June 2018, respectively. The distributions will be payable to stockholders from legally available funds therefor. Disposition of Arizona Data Center Portfolio On January 10, 2018, the Company sold a data center portfolio, or the Arizona Data Center Portfolio, consisting of two properties, for approximately $142,500,000 , which resulted in a gain. In connection with the disposition, the Company removed these properties from the unencumbered pool of the unsecured credit facility. The Company's net proceeds from the disposition of the Arizona Data Center Portfolio were approximately $140,221,000 , after transaction costs and disposition fees, subject to additional transaction costs paid subsequent to the closing date. Amended and Restated Credit Agreement Related to the Unsecured Credit Facility On February 1, 2018, the Operating Partnership and certain of the Company's subsidiaries entered into an amended and restated credit agreement related to the unsecured credit facility to remove one lender and to increase the maximum commitment available under the unsecured credit facility to $400,000,000 , consisting of a revolving line of credit, with a maturity date of May 28, 2019 , subject to the Operating Partnership's right to a 12 -month extension. Subject to certain conditions, the unsecured credit facility can be increased to $750,000,000 . All other material terms of the unsecured credit facility remained unchanged.

Schedule III - Real Estate Asse

Schedule III - Real Estate Assets and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2017
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate Assets and Accumulated Depreciation	CARTER VALIDUS MISSION CRITICAL REIT, INC. SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION December 31, 2017 (in thousands) Initial Cost Cost Gross Amount Property Description Location Encumbrances Land Buildings and Land Buildings and Total Accumulated Year Date St. Louis Surgical Center Creve Coeur, MO — (a) 808 8,206 — 808 8,206 9,014 1,663 2005 02/09/2012 Stonegate Medical Center Austin, TX — (a) 1,904 5,764 90 1,904 5,854 7,758 1,201 2008 03/30/2012 HPI Integrated Medical Facility Oklahoma City, OK — (a) 789 7,815 — 789 7,815 8,604 1,288 2007 06/28/2012 Baylor Medical Center Dallas, TX 18,316 4,012 23,557 — 4,012 23,557 27,569 3,204 2010 08/29/2012 Vibra Denver Hospital Denver, CO — (a) 1,798 15,012 5,872 1,798 20,884 22,682 2,256 1962 (e) 09/28/2012 Vibra New Bedford Hospital New Bedford, MA — (a) 1,992 21,823 — 1,992 21,823 23,815 2,938 1942 10/22/2012 Houston Surgery Center Houston, TX — (a) 503 4,115 510 503 4,625 5,128 622 1998 (f) 11/28/2012 Akron General Medical Center Green, OH — (a) 2,936 36,142 (199 ) 2,936 35,943 38,879 4,792 2012 12/28/2012 Grapevine Hospital Grapevine, TX 12,371 962 20,277 105 962 20,382 21,344 2,590 2007 02/25/2013 Andover Data Center (o) Andover, MA — (a) 2,279 9,391 — 2,279 9,391 11,670 1,487 1984 (g) 03/28/2013 Wilkes-Barre Healthcare Facility Mountain Top, PA — (a) 335 3,812 — 335 3,812 4,147 553 2012 05/31/2013 Fresenius Healthcare Facility Goshen, IN — (a) 304 3,965 — 304 3,965 4,269 462 2010 06/11/2013 Physicians’ Specialty Hospital Fayetteville, AR — (a) 322 19,974 — 322 19,974 20,296 2,296 1994 (h) 06/28/2013 Christus Cabrini Surgery Center Alexandria, LA — (a) — 4,235 — — 4,235 4,235 484 2007 07/31/2013 Valley Baptist Wellness Center Harlingen, TX 5,842 — 8,386 — — 8,386 8,386 955 2007 08/16/2013 Akron General Integrated Medical Facility Green, OH — (a) 904 7,933 1 904 7,934 8,838 1,009 2013 08/23/2013 Cumberland Surgical Hospital (m) San Antonio, TX — 3,440 25,923 4,164 3,440 30,087 33,527 3,648 2013 08/29/2013 Post Acute/Warm Springs Rehab Hospital of Westover Hills San Antonio, TX — (a) 1,740 18,280 — 1,740 18,280 20,020 1,989 2012 09/06/2013 Warm Springs Rehabilitation Hospital San Antonio, TX — (a) — 23,462 — — 23,462 23,462 2,435 1987 11/27/2013 Lubbock Heart Hospital Lubbock, TX 18,615 3,749 32,174 — 3,749 32,174 35,923 3,281 2003 12/20/2013 Walnut Hill Medical Center Dallas, TX — 3,337 79,116 (26,769 ) 2,143 53,541 55,684 7,673 1983 (i) 02/25/2014 Cypress Pointe Surgical Hospital Hammond, LA — (a) 1,379 20,549 $ — 1,379 20,549 21,928 2,038 2006 03/14/2014 Milwaukee Data Center (o) Hartland, WI — (a) 1,240 16,872 — 1,240 16,872 18,112 1,628 2004 03/28/2014 Bay Area Regional Medical Center Webster, TX 86,333 6,937 168,710 63,823 6,937 232,533 239,470 15,237 2014 07/11/2014 Phoenix Data Center (j), (o) Phoenix, AZ — (a) 11,576 78,188 — 11,576 78,188 89,764 6,373 2005 08/27/2014 Scottsdale Data Center (j), (o) Scottsdale, AZ — (a) 3,515 24,907 — 3,515 24,907 28,422 2,026 2000 08/27/2014 Rhode Island Rehabilitation Healthcare Facility North Smithfield, RI — (a) 818 11,597 — 818 11,597 12,415 1,097 1965 (k) 08/28/2014 Select Medical—Akron Akron, OH — (a) 2,207 23,430 — 2,207 23,430 25,637 2,003 2008 08/29/2014 Select Medical—Frisco Frisco, TX — (a) — 20,679 — — 20,679 20,679 1,852 2010 08/29/2014 Select Medical—Bridgeton Bridgeton, MO — (a) — 31,204 — — 31,204 31,204 2,689 2012 08/29/2014 San Antonio Healthcare Facility (n) San Antonio, TX — 3,200 — 16,366 3,200 16,366 19,566 391 2017 09/12/2014 Dermatology Assoc-Randolph Ct Manitowoc, WI — (a) 390 2,202 — 390 2,202 2,592 214 2003 09/15/2014 Initial Cost Cost Gross Amount Property Description Location Encumbrances Land Buildings and Land Buildings and Total Accumulated Year Date Dermatology Assoc-Murray St Marinette, WI — (a) 253 1,134 — 253 1,134 1,387 116 2008 09/15/2014 Dermatology Assoc-N Lightning Dr Appleton, WI — (a) 463 2,049 — 463 2,049 2,512 212 2011 09/15/2014 Dermatology Assoc-Development Dr Bellevue, WI — (a) 491 1,450 — 491 1,450 1,941 150 2010 09/15/2014 Dermatology Assoc-York St Manitowoc, WI — (a) 305 11,299 — 305 11,299 11,604 996 1964 (l) 09/15/2014 Dermatology Assoc-Scheuring Rd De Pere, WI — (a) 703 1,851 — 703 1,851 2,554 187 2005 09/15/2014 Dermatology Assoc-Riverview Dr Howard, WI — (a) 552 1,960 — 552 1,960 2,512 202 2011 09/15/2014 Dermatology Assoc-State Rd 44 Oshkosh, WI — (a) 384 2,514 — 384 2,514 2,898 254 2010 09/15/2014 Dermatology Assoc-Green Bay Rd Sturgeon Bay, WI — (a) 364 657 — 364 657 1,021 75 2007 09/15/2014 Lafayette Surgical Hospital Lafayette, LA — (a) 3,909 33,212 262 3,909 33,474 37,383 2,829 2004 09/19/2014 Alpharetta Data Center II (o) Alpharetta, GA — (a) 3,100 54,880 4 3,100 54,884 57,984 4,171 1999 10/31/2014 Landmark Hospital of Savannah Savannah, GA — (a) 1,980 15,418 — 1,980 15,418 17,398 1,165 2014 01/15/2015 21st Century Oncology-Yucca Valley Yucca Valley, CA — 663 4,004 — 663 4,004 4,667 327 2009 03/31/2015 21st Century Oncology-Rancho Mirage Rancho Mirage, CA — 156 5,934 — 156 5,934 6,090 478 2008 03/31/2015 21st Century Oncology-Palm Desert Palm Desert, CA — 364 5,340 — 364 5,340 5,704 403 2005 03/31/2015 21st Century Oncology-Santa Rosa Beach Santa Rosa Beach, FL — 646 3,211 — 646 3,211 3,857 234 2003 03/31/2015 21st Century Oncology-Crestview Crestview, FL — 205 2,503 — 205 2,503 2,708 198 2004 03/31/2015 21st Century Oncology-Fort Walton Beach Fort Walton Beach, FL — 747 3,012 — 747 3,012 3,759 234 2005 03/31/2015 21st Century Oncology-Bradenton Bradenton, FL — 835 2,699 (1,560 ) 443 1,531 1,974 206 2002 03/31/2015 21st Century Oncology-Tamarac Tamarac, FL — 692 1,496 (844 ) 409 935 1,344 124 1997 03/31/2015 21st Century Oncology-Fort Myers I Fort Myers, FL — 2,301 1,180 — 2,301 1,180 3,481 152 1999 03/31/2015 21st Century Oncology-Fort Myers II Fort Myers, FL — 4,522 13,106 — 4,522 13,106 17,628 1,021 2010 03/31/2015 21st Century Oncology-Bonita Springs Bonita Springs, FL — 1,146 3,978 — 1,146 3,978 5,124 288 2002 03/31/2015 21st Century Oncology-Lehigh Acres Lehigh Acres, FL — 433 2,508 — 433 2,508 2,941 186 2002 03/31/2015 21st Century Oncology-East Naples Naples, FL — 717 5,278 (4,038 ) 200 1,757 1,957 399 2007 03/31/2015 21st Century Oncology-Jacksonville Jacksonville, FL — 802 5,879 — 802 5,879 6,681 516 2009 03/31/2015 21st Century Oncology-Frankfort Frankfort, KY — 291 817 — 291 817 1,108 69 1993 03/31/2015 21st Century Oncology-Las Vegas Las Vegas, NV — 251 4,927 — 251 4,927 5,178 371 2007 03/31/2015 21st Century Oncology-Henderson Henderson, NV — 617 2,324 — 617 2,324 2,941 187 2000 03/31/2015 21st Century Oncology-Fairlea Fairlea, WV — 125 1,717 — 125 1,717 1,842 131 1999 03/31/2015 21st Century Oncology-El Segundo El Segundo, CA — 1,138 8,743 — 1,138 8,743 9,881 622 2009 04/20/2015 21st Century Oncology-Lakewood Ranch Bradenton, FL — 553 8,516 — 553 8,516 9,069 636 2008 04/20/2015 Post Acute Medical - Victoria I Victoria, TX — (a) 331 10,278 — 331 10,278 10,609 442 2013 05/23/2016 Post Acute Medical - Victoria II Victoria, TX — (a) 450 10,393 — 450 10,393 10,843 440 1998 05/23/2016 Post Acute Medical - New Braunfels New Braunfels, TX — (a) 1,619 9,295 — 1,619 9,295 10,914 394 2007 05/23/2016 Post Acute Medical - Covington Covington, LA — (a) 1,529 13,503 — 1,529 13,503 15,032 563 1984 05/23/2016 Post Acute Medical - Hammond Hammond, LA — (a) 852 9,815 — 852 9,815 10,667 425 2004 05/23/2016 $ 141,477 $ 97,865 $ 1,044,580 $ 57,787 $ 95,479 $ 1,104,753 $ 1,200,232 $ 101,777 (a) Property collateralized under the unsecured credit facility. As of December 31, 2017 , 40 commercial properties, consisting of 35 commercial properties classified as continuing operations and 5 commercial properties classified as discontinued operations, were collateralized under the unsecured credit facility and the Company had $0 aggregate principal amount outstanding thereunder. (b) The cost capitalized subsequent to acquisition is shown net of asset write-offs. (c) The aggregated cost for federal income tax purposes is approximately $1,126,769,000 (unaudited). (d) The Company’s assets are depreciated using the straight-line method over the useful lives of the assets by class. Generally, buildings and improvements are depreciated over 15 - 40 years. (e) The Vibra Denver Hospital was renovated in 1985 . (f) The Houston Surgery Center was renovated in 2012 . (g) The Andover Data Center was renovated in 2010 . (h) The Physicians Specialty Hospital was renovated in 2009 . (i) The Walnut Hill Medical Center was renovated in 2013 . (j) The Phoenix Data Center and Scottsdale Data Center were both sold on January 10, 2018 . (k) The Rhode Island Rehabilitation Healthcare Facility was renovated in 1999 . (l) The Dermatology Assoc-York St was renovated in 2010 . (m) Formerly known as Victory Medical Center Landmark. (n) Formerly known as Victory IMF. (o) Property classified as a part of discontinued operations. CARTER VALIDUS MISSION CRITICAL REIT, INC. SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION (CONTINUED) December 31, 2017 (in thousands) 2017 2016 2015 Real Estate Balance at beginning of year $ 2,163,358 $ 2,036,330 $ 1,845,136 Additions: Acquisitions — 58,065 121,774 Improvements, net of write-offs (11,533 ) 68,963 69,420 Dispositions (951,593 ) — — Balance at end of year $ 1,200,232 $ 2,163,358 $ 2,036,330 Accumulated Depreciation Balance at beginning of year $ (152,486 ) $ (100,142 ) $ (52,785 ) Depreciation (49,483 ) (52,344 ) (47,357 ) Dispositions 100,192 — — Balance at end of year $ (101,777 ) $ (152,486 ) $ (100,142 )

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements include the accounts of the Company, the Operating Partnership, all majority-owned subsidiaries and controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. As of December 31, 2017 , in addition to the Operating Partnership consolidation, the Company consolidated the accounts of one VIE, the 180 Peachtree Data Center, as the Company has the power to direct the activities that most significantly impact the entity’s economic performance.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP necessarily requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates are made and evaluated on an ongoing basis using information that is currently available as well as various other assumptions believed to be reasonable under the circumstances. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value.
Restricted Cash	Restricted Cash Restricted cash consists of restricted cash held in escrow and restricted bank deposits. Restricted cash held in escrow includes cash held by lenders in escrow accounts for tenant and capital improvements, repairs and maintenance and other lender reserves for certain properties, in accordance with the respective lender’s loan agreement. Restricted cash is reported in other assets, net in the accompanying consolidated balance sheets . Restricted bank deposits consist of tenant receipts for certain properties which are required to be deposited into lender controlled accounts in accordance with the respective lender's loan agreement. Restricted bank deposits are reported in other assets, net in the accompanying consolidated balance sheets . See Note 6—"Other Assets, Net." On April 1, 2017, the Company adopted Accounting Standards Update, or ASU, 2016-18, Restricted Cash , or ASU 2016-18. ASU 2016-18 requires that a statement of cash flows explain the change during a reporting period in the total of cash, cash equivalents, and amounts generally described as restricted cash. This ASU states that transfers between cash, cash equivalents, and restricted cash are not part of the Company’s operating, investing, and financing activities. Therefore, restricted cash should be included with cash and cash equivalents when reconciling the beginning of period and end of period total amounts shown on the statement of cash flows. As required, the Company retrospectively applied the guidance in ASU 2016-18 to the prior period presented, which resulted in a decrease of $221,000 in net cash used in financing activities and an increase of $228,000 in net cash provided by operating activities for the year ended December 31, 2016 and an increase of $279,000 in net cash provided by financing activities and an increase of $148,000 in net cash provided by operating activities for the year ended December 31, 2015 on the consolidated statements of cash flows . The following table presents a reconciliation of the beginning of year and end of year cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the totals shown in the consolidated statements of cash flows : For the Year Ended Beginning of year: 2017 2016 2015 Cash and cash equivalents $ 42,613 $ 28,527 $ 113,093 Restricted cash (1) 14,992 14,543 14,116 Cash, cash equivalents and restricted cash $ 57,605 $ 43,070 $ 127,209 End of year: Cash and cash equivalents $ 336,500 $ 42,613 $ 28,527 Restricted cash (1) 15,414 14,992 14,543 Cash, cash equivalents and restricted cash $ 351,914 $ 57,605 $ 43,070 (1) Amount attributable to continuing and discontinued operations.
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs are loan fees, legal fees and other third-party costs associated with obtaining financing. These costs are amortized over the terms of the respective financing agreements using the effective interest method. Unamortized deferred financing costs are generally expensed when the associated debt is refinanced or repaid before maturity unless specific rules are met that would allow for the carryover of such costs to the refinanced debt. Costs incurred in seeking financing transactions that do not close are expensed in the period in which it is determined that the financing will not close. Deferred financing costs are recorded as a reduction of the related debt on the accompanying consolidated balance sheets.
Investment in Real Estate	Investment in Real Estate Real estate costs related to the acquisition, development, construction and improvement of properties are capitalized. Repair and maintenance costs are expensed as incurred and significant replacements and betterments are capitalized. Repair and maintenance costs include all costs that do not extend the useful life of the real estate asset. The Company considers the period of future benefit of an asset in determining the appropriate useful life. Real estate assets, other than land, are depreciated or amortized on a straight-line basis over each asset’s useful life. The Company estimated the useful lives of its assets by class as follows: Buildings and improvements 15 – 40 years Tenant improvements Shorter of lease term or expected useful life Furniture, fixtures, and equipment 3 – 10 years
Allocation of Purchase Price of Real Estate	Allocation of Purchase Price of Real Estate Upon the acquisition of real properties, the Company evaluates whether the acquisition is a business combination or an asset acquisition. For both business combinations and asset acquisitions the Company allocates the purchase price of properties to acquired tangible assets, consisting of land, buildings and improvements, and acquired intangible assets and liabilities, consisting of the value of above-market and below-market leases and the value of in-place leases. For asset acquisitions, the Company capitalizes transaction costs and allocates the purchase price using a relative fair value method allocating all accumulated costs. For business combinations, the Company expenses transaction costs associated as incurred and allocates the purchase price based on the estimated fair value of each separately identifiable asset and liability. The fair values of the tangible assets of an acquired property (which includes the land and buildings and improvements) are determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land and buildings and improvements based on management’s determination of the relative fair value of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market conditions. The fair values of above-market and below-market in-place lease values are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) an estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease including any fixed rate bargain renewal periods, with respect to a below-market lease. The above-market and below-market lease values are capitalized as intangible lease assets or liabilities. Above-market lease values are amortized as an adjustment of rental income over the remaining terms of the respective leases. Below-market leases are amortized as an adjustment of rental income over the remaining terms of the respective leases, including any fixed rate bargain renewal periods. If a lease were to be terminated prior to its stated expiration, all unamortized amounts of above-market and below-market in-place lease values related to that lease would be recorded as an adjustment to rental income. The fair values of in-place leases include an estimate of direct costs associated with obtaining a new tenant and opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease. Direct costs associated with obtaining a new tenant include commissions, tenant improvements, and other direct costs and are estimated based on management’s consideration of current market costs to execute a similar lease. The value of opportunity costs is calculated using the contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. The in-place lease intangibles are amortized to expense over the remaining terms of the respective leases. If a lease were to be terminated prior to its stated expiration, all unamortized amounts of in-place lease assets relating to that lease would be expensed.
Held for Sale and Discontinued Operations	Held for Sale and Discontinued Operations The Company classifies a real estate property as held for sale upon satisfaction all of the following criteria: (i) management commits to a plan to sell a property, (ii) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary for sales of such properties, (iii) there is an active program to locate a buyer, (iv) the sale of the property is probable and transfer of the asset is expected to be completed within one year, (v) the property is being actively marketed for sale, and (vi) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Upon the determination to classify a property as held for sale, the Company ceases depreciation and amortization on the real estate properties held for sale, including depreciation for tenant improvements, as well as on the amortization of acquired in-place leases. The real estate properties held for sale and associated liabilities are classified separately on the consolidated balance sheets. Such properties are recorded at the lesser of the carrying value or estimated fair value less estimated cost to sell. Additionally, the Company classified real estate properties held for sale as discontinued operations for all periods presented if the disposal represents a strategic shift that has (or will have) a major effect on the Company's results and operations, the assets, liabilities and operations for the years presented are classified on the consolidated balance sheets and consolidated statements of comprehensive income as discontinued operations for all periods presented.
Acquisition Fees and Expenses	Acquisition Fees and Expenses Acquisition fees and expenses associated with the acquisition of properties determined to be business combinations are expensed as incurred, including investment transactions that are no longer under consideration, and are included in acquisition related expenses in the accompanying consolidated statements of comprehensive income . During the years ended December 31, 2017 , 2016 and 2015 , the Company expensed acquisition fees and expenses related to business combinations transactions in the amount of $0 , $1,667,000 and $3,473,000 , respectively. Acquisition fees and expenses associated with transactions determined to be asset acquisitions are capitalized in real estate, net in the accompanying consolidated balance sheets. We did not capitalize acquisition fees and expenses for the years ended December 31, 2017 , 2016 and 2015 .
Impairment of Long Lived Assets	Impairment of Long Lived Assets The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets may not be recoverable. When indicators of potential impairment suggest that the carrying value of real estate and related intangible assets may not be recoverable, the Company assesses the recoverability of the assets by estimating whether the Company will recover the carrying value of the assets through its undiscounted future cash flows and their eventual disposition. If based on this analysis the Company does not believe that it will be able to recover the carrying value of the assets, the Company will record an impairment loss to the extent that the carrying value exceeds the estimated fair value of the assets. During the year ended December 31, 2017, real estate assets related to four properties with an aggregate carrying amount of $85,768,000 were determined to be impaired, using Level 3 inputs of the fair value hierarchy (defined below), and their carrying values were reduced to their estimated fair value of $52,557,000 , resulting in an impairment charge of $33,211,000 , which is included in impairment loss on real estate in the consolidated statements of comprehensive income . The Company reviews each property based on the highest and best use and market participant assumptions. The Company used a discounted cash flow analysis and a market approach analysis to estimate the fair value of real estate assets relating to the properties. See Note 12—"Fair Value" for more details. In addition, during the year ended December 31, 2017 , the Company recorded an impairment loss of $5,936,000 related to one real estate property, which was sold on December 28, 2017 in the amount of $88,000,000 . The impairment loss is included in impairment loss on real estate in the consolidated statements of comprehensive income . No impairment losses were recorded during the years ended December 31, 2016 and 2015 . When developing estimates of expected future cash flows, the Company makes certain assumptions regarding future market rental income amounts subsequent to the expiration of current lease arrangements, property operating expenses, terminal capitalization and discount rates, the expected number of months it takes to re-lease the property, required tenant improvements and the number of years the property will be held for investment. The use of alternative assumptions in the future cash flow analysis could result in a different determination of the property’s future cash flows and a different conclusion regarding the existence of an impairment, the extent of such loss, if any, as well as the carrying value of the real estate and related assets. For the year ended December 31, 2017 , the Company recognized an impairment of three in-place lease intangible assets in the amount of approximately $1,151,000 and one below-market lease in the amount of approximately $86,000 by accelerating the amortization of the intangibles as a result of a lease amendment. For the year ended December 31, 2016 , the Company recognized an impairment of one in-place lease intangible asset and one capitalized lease commission by accelerating the amortization in the amount of $16,400,000 as a result of two tenants experiencing financial difficulties.
Fair Value	Fair Value Accounting Standards Codification, or ASC, 820, Fair Value Measurements and Disclosures , or ASC 820, defines fair value, establishes a framework for measuring fair value in accordance with GAAP and expands disclosures about fair value measurements. ASC 820 emphasizes that fair value is intended to be a market-based measurement, as opposed to a transaction-specific measurement. Fair value is defined by ASC 820 as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, various techniques and assumptions can be used to estimate the fair value. Assets and liabilities are measured using inputs from three levels of the fair value hierarchy, as follows: Level 1—Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. An active market is defined as a market in which transactions for the assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2—Inputs other than quoted prices for similar assets and liabilities in active markets that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data correlation or other means (market corroborated inputs). Level 3—Unobservable inputs, only used to the extent that observable inputs are not available, reflect the Company’s assumptions about the pricing of an asset or liability. The following describes the methods the Company used to estimate the fair value of the Company’s financial assets and liabilities: Cash and cash equivalents, restricted cash, tenant receivables, property escrow deposits, prepaid expenses, accounts payable and accrued liabilities —The Company considered the carrying values of these financial instruments, assets and liabilities, to approximate fair value because of the short period of time between origination of the instruments and their expected realization. Notes payable—Fixed Rate —The fair value is estimated by discounting the expected cash flows on notes payable at current rates at which management believes similar loans would be made considering the terms and conditions of the loan and prevailing market interest rates. Notes payable—Variable Rate —The carrying value of variable rate notes payable approximates fair value because the interest rates adjust with current market conditions. Unsecured credit facility—Fixed Rate —The fair value is estimated by discounting the expected cash flows on the fixed rate unsecured credit facility at current rates at which management believes similar borrowings would be made considering the terms and conditions of the borrowings and prevailing market interest rates. Unsecured credit facility—Variable Rate —The carrying value of the variable rate unsecured credit facility approximates fair value as the interest is calculated at the London Interbank Offered Rate, plus an applicable margin. The interest rate resets to market on a monthly basis. The fair value of the Company's variable rate unsecured credit facility is estimated based on the interest rates currently offered to the Company by financial institutions. Notes receivable —The fair value is estimated by discounting the expected cash flows on the notes at interest rates at which management believes similar loans would be made. Derivative instruments —The Company’s derivative instruments consist of interest rate swaps. These swaps are carried at fair value to comply with the provisions of ASC 820. The fair value of these instruments is determined using interest rate market pricing models. The Company incorporated credit valuation adjustments to appropriately reflect the Company’s nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. Considerable judgment is necessary to develop estimated fair values of financial assets and liabilities. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize, or be liable for on disposition of the financial assets and liabilities.
Revenue Recognition, Tenant Receivables and Allowance for Uncollectible Accounts	Revenue Recognition, Tenant Receivables and Allowance for Uncollectible Accounts The Company recognizes revenue in accordance with ASC 605, Revenue Recognition , or ASC 605. ASC 605 requires that all four of the following basic criteria be met before revenue is realized or realizable and earned: (1) there is persuasive evidence that an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the seller’s price to the buyer is fixed and determinable; and (4) collectability is reasonably assured. In accordance with ASC 840, Leases , minimum rental revenue is recognized on a straight-line basis over the term of the related lease (including rent holidays). Differences between rental income recognized and amounts contractually due under the lease agreements are credited or charged to deferred rent receivable or deferred rent liability, as applicable. Tenant reimbursement revenue, which is comprised of additional amounts recoverable from tenants for common area maintenance expenses and certain other recoverable expenses, is recognized as revenue in the period in which the related expenses are incurred. Tenant reimbursements are recognized and presented in accordance with ASC Subtopic 605-45, Revenue Recognition—Principal Agent Consideration, or ASC 605-45. ASC 605-45 requires that these reimbursements be recorded on a gross basis, when the Company is the primary obligor with respect to purchasing goods and services from third-party suppliers and has discretion in selecting the supplier and has credit risk. Tenant receivables and unbilled deferred rent receivables are carried net of the allowances for uncollectible amounts. An allowance will be maintained for estimated losses resulting from the inability of certain tenants to meet the contractual obligations under their lease agreements. The Company also maintains an allowance for deferred rent receivables arising from the straight-lining of rents. The Company’s determination of the adequacy of these allowances is based primarily upon evaluations of historical loss experience, the tenant’s financial condition, security deposits, letters of credit, lease guarantees and current economic conditions and other relevant factors. For the years ended December 31, 2017 and 2016 , the Company recorded $20,755,000 and $26,177,000 , respectively, in provision for doubtful accounts for rental revenue, tenant reimbursement revenue and straight-line rent receivable, which are recognized in the accompanying consolidated statements of comprehensive income as a deduction from rental revenue and tenant reimbursement revenue.
Notes Receivable	Notes Receivable Notes receivable are reported at their outstanding principal balance, net of any unearned income, unamortized deferred fees and costs and allowances for loan losses. The unamortized deferred fees and costs are amortized over the life of the notes receivable, as applicable and recorded in other interest and dividend income in the accompanying consolidated statements of comprehensive income . The Company evaluates the collectability of both interest and principal on each note receivable to determine whether it is collectible, primarily through the evaluation of credit quality indicators, such as the tenant's financial condition, evaluations of historical loss experience, current economic conditions and other relevant factors, including contractual terms of repayments. Evaluating a note receivable for potential impairment requires management to exercise significant judgment. As of December 31, 2017 and 2016 , the aggregate balance on the Company's notes receivable, including accrued interest receivable, before allowances for loan losses was $36,368,000 and $19,422,000 , respectively. For the years ended December 31, 2017 and 2016 , the Company recorded $11,936,000 and $4,294,000 , respectively, as an allowance to reduce the carrying value of notes receivable, accrued interest and origination fees related to two tenants in provision for loan losses in the accompanying consolidated financial statements.
Income Taxes	Income Taxes The Company currently qualifies and is taxed as a REIT under Sections 856 through 860 of the Code. Accordingly, it will generally not be subject to corporate U.S. federal or state income tax to the extent that it makes qualifying distributions to stockholders, and provided it satisfies, on a continuing basis, through actual investment and operating results, the REIT requirements, including certain asset, income, distribution and stock ownership tests. If the Company fails to qualify as a REIT, and does not qualify for certain statutory relief provisions, it will be subject to U.S. federal, state and local income taxes and may be precluded from qualifying as a REIT for the subsequent four taxable years following the year in which it lost its REIT qualification, unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Accordingly, failure to qualify as a REIT could have a material adverse impact on the results of operations and amounts available for distribution to stockholders. The dividends paid deduction of a REIT for qualifying dividends paid to its stockholders is computed using the Company’s taxable income as opposed to net income reported in the consolidated financial statements. Taxable income, generally, will differ from net income reported in the consolidated financial statements because the determination of taxable income is based on tax provisions and not financial accounting principles. The Company has concluded that there was no impact related to uncertain tax provisions from results of operations of the Company for the years ended December 31, 2017 , 2016 and 2015 . The United States of America is the jurisdiction for the Company, and the earliest tax year subject to examination is 2014.
Concentration of Credit Risk and Significant Leases	Concentration of Credit Risk and Significant Leases As of December 31, 2017 , the Company had cash on deposit, including restricted cash, in certain financial institutions that had deposits in excess of current federally insured levels; however, the Company has not experienced any losses in such accounts. The Company limits its cash investments to financial institutions with high credit standings; therefore, the Company believes it is not exposed to any significant credit risk on its cash deposits. To date, the Company has experienced no loss of or lack of access to cash in its accounts. As of December 31, 2017 , the Company owned real estate investments in 38 MSAs, three of which accounted for 10.0% or more of contractual rental revenue from continuing operations. Real estate investments located in the Houston-The Woodlands-Sugar Land, Texas MSA, the San Antonio-New Braunfels, Texas MSA and the Dallas-Ft. Worth-Arlington, Texas MSA accounted for an aggregate of 21.3% , 10.2% and 10.2% , respectively, of contractual rental revenue from continuing operations for the year ended December 31, 2017 . For the year ended December 31, 2017 , 100.0% , of contractual rental revenue from continuing operations was attributable to the healthcare segment. As of December 31, 2017 , the Company had three exposures to tenant concentration that accounted for 10.0% or more of contractual rental revenue from continuing operations. The leases with Bay Area Regional Medical Center, LLC, Post Acute Medical, LLC and 21st Century Oncology, Inc. accounted for 20.9% , 12.0% and 10.0% , respectively, of contractual rental revenue for the year ended December 31, 2017 .
Stock-based Compensation	Stock-based Compensation The Company accounts for stock-based compensation based upon the estimated fair value of the share awards. Accounting for stock-based compensation requires the fair value of the share awards to be amortized as compensation expense over the period for which the services relate and requires any dividend equivalents earned to be treated as dividends for financial reporting purposes. See Note 15—"Stock-based Compensation" for a further discussion of stock-based compensation awards.
Stockholders' Equity	Stockholders’ Equity As of December 31, 2017 , the Company was authorized to issue 350,000,000 shares of stock, of which 300,000,000 shares are designated as common stock at $0.01 par value per share and 50,000,000 shares are designated as preferred stock at $0.01 par value per share. As of December 31, 2017 , the Company had approximately 196,893,000 shares of common stock issued and 186,182,000 shares of common stock outstanding, and no shares of preferred stock issued and outstanding. As of December 31, 2016 , the Company had approximately 189,848,000 shares of common stock issued and 184,910,000 shares of common stock outstanding, and no shares of preferred stock issued and outstanding. The Company’s board of directors may authorize additional shares of capital stock and amend their terms without obtaining stockholder approval.
Share Repurchase Program	Share Repurchase Program The Company’s share repurchase program allows for repurchases of shares of the Company’s common stock when certain criteria are met. The share repurchase program provides that all repurchases during any calendar year, including those redeemable upon death or a qualifying disability of a stockholder, are limited to those that can be funded with equivalent reinvestments pursuant to the DRIP Offerings during the prior calendar year and other operating funds, if any, as the board of directors, in its sole discretion, may reserve for this purpose. Repurchases of shares of the Company’s common stock are at the sole discretion of the Company’s board of directors. In addition, the Company’s board of directors, in its sole discretion, may amend, suspend, reduce, terminate or otherwise change the share repurchase program upon 30 days ' prior notice to the Company’s stockholders for any reason it deems appropriate. The share repurchase program provides that the Company will limit the number of shares repurchased during any calendar year to 5.0% of the number of shares of common stock outstanding as of December 31st of the previous calendar year. During the year ended December 31, 2017 , the Company received valid repurchase requests related to approximately 5,773,000 shares of common stock, or 3.12% of shares outstanding as of December 31, 2016, all of which were repurchased in full for an aggregate purchase price of approximately $57,049,000 (an average of $9.88 per share). During the year ended December 31, 2016 , the Company received valid repurchase requests related to approximately 3,432,000 shares of common stock, or 1.89% of shares outstanding as of December 31, 2015, all of which were repurchased in full for an aggregate purchase price of approximately $33,335,000 (an average of $9.71 per share).
Distribution Policy and Distributions Payable	Distribution Policy and Distributions Payable In order to maintain its status as a REIT, the Company is required to make distributions each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends paid deduction and excluding capital gains. To the extent funds are available, the Company intends to continue to pay regular distributions to stockholders. Distributions are paid to stockholders of record as of the applicable record dates. As of December 31, 2017 , the Company had aggregate distributions, since inception, of approximately $509,989,000 ( $241,512,000 in cash and $268,477,000 of which were reinvested in shares of common stock pursuant to the DRIP and the DRIP Offerings). The Company’s distributions declared per common share were $0.70 for the years ended December 31, 2017 , 2016 and 2015 . As of December 31, 2017 , the Company had distributions payable of approximately $11,076,000 . Of those payable distributions, $5,468,000 was paid in cash and $5,608,000 was reinvested in shares of common stock pursuant to the Third DRIP Offering on January 2, 2018 . Distributions to stockholders are determined by the board of directors of the Company and are dependent upon a number of factors relating to the Company, including funds available for the payment of distributions, financial condition, the timing of property acquisitions, capital expenditure requirements, and annual distribution requirements in order to maintain the Company’s status as a REIT under the Code.
Earnings Per Share	Earnings Per Share Basic earnings per share for all periods presented are computed by dividing net income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Shares of non-vested restricted common stock give rise to potentially dilutive shares of common stock. Diluted earnings per share are computed based on the weighted average number of shares outstanding and all potentially dilutive securities. For the year ended December 31, 2017, diluted earnings per share was computed the same as basic earnings per share because the Company recorded a loss from continuing operations, which would make potentially dilutive shares related to non-vested shares of restricted common stock antidilutive. For the years ended December 31, 2016 and 2015 , diluted earnings per share reflected the effect of approximately 18,000 for each year of non-vested shares of restricted common stock that were outstanding as of such period.
Reportable Segments	Reportable Segments ASC 280, Segment Reporting , establishes standards for reporting financial and descriptive information about an enterprise’s reportable segments. As of December 31, 2017 , 2016 and 2015, 100% of the Company’s consolidated revenues from continuing operations were generated from real estate investments in healthcare properties. The Company’s chief operating decision maker evaluates operating performance of healthcare properties on an individual property level, which are aggregated into one reportable segment due to their similar economic characteristics. In accordance with the definition of discontinued operations, the Company's decision to sell the properties in the data center segment represents a strategic shift that has a major effect on the Company's results and operations and assets and liabilities for the periods presented. As a result, the Company no longer has its data centers segment. All activities related to the previously reported data centers segment have been classified as discontinued operations. The assets and liabilities related to discontinued operations are separately classified on the consolidated balance sheets as of December 31, 2017 and 2016 , and the operations have been classified as income from discontinued operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 .
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities As required by ASC 815, Derivatives and Hedging, or ASC 815, the Company records all derivative instruments as assets and liabilities in the statement of financial position at fair value. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, a company must designate the hedging instrument, based upon the exposure being hedged, as a fair value hedge, cash flow hedge or a hedge of a net investment in a foreign operation. For derivative instruments not designated as hedging instruments, the income or loss is recognized in the consolidated statements of comprehensive income during the current period. The Company is exposed to variability in expected future cash flows that are attributable to interest rate changes in the normal course of business. The Company’s primary strategy in entering into derivative contracts is to add stability to future cash flows by managing its exposure to interest rate movements. The Company utilizes derivative instruments, including interest rate swaps, to effectively convert some its variable rate debt to fixed rate debt. The Company does not enter into derivative instruments for speculative purposes. In accordance with ASC 815, the Company designates interest rate swap contracts as cash flow hedges of floating-rate borrowings. For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income (loss) in the consolidated statements of comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction and the same period during which the hedged transaction affects earnings. The ineffective portion of the income or loss on the derivative instrument is recognized in the consolidated statements of comprehensive income during the current period. In accordance with the fair value measurement guidance ASU 2011-04, Fair Value Measurement , the Company made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements On May 28, 2014, the Financial Accounting Standards Board, or the FASB, issued ASU 2014-09, Revenue from Contracts with Customers , or ASU 2014-09. The objective of ASU 2014-09 is to clarify the principles for recognizing revenue and to develop a common revenue standard for GAAP. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods and services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle, which may require more judgment and estimates within the revenue recognition process than are required under existing GAAP. The Company has preliminarily determined the revenue stream that could be most significantly impacted by this ASU relates to parking revenue. The Company determined that the revenue recognition from parking revenue will be generally consistent with current recognition methods, and therefore will not have material changes to the consolidated financial statements as a result of adoption. For the year ended December 31, 2017, parking revenue was less than 10% of consolidated revenue. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date , or ASU 2015-14. ASU 2015-14 defers the effective date of ASU 2014-09 by one year to fiscal years and interim periods beginning after December 15, 2017. Early adoption is permitted as of the original effective date, which was annual reporting periods beginning after December 15, 2016, and the interim periods within that year. On March 17, 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers Principal versus Agent Considerations (Reporting Revenue Gross versus Net), or ASU 2016-08, which clarifies the implementation guidance on principal versus agent considerations in the new revenue recognition standard. ASU 2016-08 clarifies that an entity is a principal when it controls the specified good or service before that good or service is transferred to the customer, and is an agent when it does not control the specified good or service before it is transferred to the customer. The effective date and transition of this update is the same as the effective date and transition of ASU 2015-14. As the majority of the Company's revenue is derived from real estate lease contracts, as discussed in relation to ASU 2016-02, Leases , the Company does not expect that the adoption of ASU 2014-09 or related amendments and modifications will have a material impact on the consolidated financial statements. Recoveries from tenants to be impacted by ASU 2014-09 will not be addressed until the Company's adoption of ASU 2016-02, Leases, considering its revisions to accounting for common area maintenance described below. The Company also continues to evaluate the scope of revenue-related disclosures it expects to provide pursuant to the new requirements. The standard permits the use of either a retrospective or cumulative effect transition method and permits the use of certain practical expedients. The Company currently anticipates using the modified retrospective method, however, this determination is subject to change. The Company will adopt the standard on its effective date beginning with the first quarter of 2018. On February 25, 2016, the FASB issued ASU 2016-02 , Leases , or ASU 2016-02. ASU 2016-02 establishes the principles to increase the transparency about the assets and liabilities arising from leases. ASU 2016-02 results in a more faithful representation of the rights and obligations arising from leases by requiring lessees to recognize the lease assets and lease liabilities that arise from leases in the statement of financial position and to disclose qualitative and quantitative information about lease transactions and aligns lessor accounting and sale leaseback transactions guidance more closely to comparable guidance in Topic 606, Revenue from Contracts with Customers , and Topic 610, Other Income . Under ASU 2016-02, a lessee is required to record a right of use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. The Company is a lessee on a limited number of ground leases, which will result in the recognition of a right of use asset and lease liability upon the adoption of ASU 2016-02. Lessor accounting remains largely unchanged, apart from the narrower scope of initial direct costs that can be capitalized. The new standard will result in certain costs, such as legal costs related to lease negotiations, being expensed rather than capitalized. In addition, ASU 2016-02 requires lessors to identify the lease and non-lease components, such as the reimbursement of common area maintenance, contained within each lease. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In January 2018, the FASB proposed an amendment to ASU 2016-02 to simplify the guidance by allowing lessors to elect a practical expedient to allow lessors to not separate non-lease components from a lease, which would provide the Company with the option of not bifurcating certain common area maintenance recoveries as a non-lease component. The Company will evaluate the impact of this amendment to the ASU when it is final. On June 16, 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses, or ASU 2016-13. ASU 2016-13 requires more timely recording of credit losses on loans and other financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to-maturity debt securities, trade and other receivables, net investment in leases and other such commitments. ASU 2016-13 requires that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The amendments in ASU 2016-13 require the Company to measure all expected credit losses based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets and eliminates the “incurred loss” methodology in current GAAP. ASU 2016-13 is effective for fiscal years, and interim periods within, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within, beginning after December 15, 2018. The Company is in the process of evaluating the impact ASU 2016-13 will have on the Company’s consolidated financial statements. The Company believes that certain financial statements' accounts will be impacted by the adoption of ASU 2016-13, including allowances for doubtful accounts with respect to accounts receivable, straight-line rents receivable and notes receivable. On August 26, 2016, the FASB issued ASU 2016-15, Statement of Cash Flows , or ASU 2016-15. ASU 2016-15 is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. ASU 2016-15 addresses eight classification issues related to the statement of cash flows: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon bonds; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for public business entities for annual and interim periods in fiscal years beginning after December 15, 2017. Entities should apply this ASU using a retrospective transition method to each period presented. Early adoption is permitted. The Company adopted ASU 2016-15 on October 1, 2017. As required, the Company retrospectively applied the guidance in ASU 2016-15 to the prior period presented, which resulted in an increase of $790,000 in net cash provided by operating activities and an increase of $790,000 in net cash used in financing activities for the year ended December 31, 2016 on the consolidated statements of cash flows . On January 5, 2017, the FASB issued ASU 2017-01, Business Combinations , or ASU 2017-01. ASU 2017-01 clarifies the definition of a business. The objective of ASU 2017-01 is to add further guidance that assists entities in evaluating whether a transaction will be accounted for as an acquisition of an asset or a business. The guidance requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If so, the set of transferred asset and activities is not a business. The guidance also requires a business to include at least one substantive process and narrows the definition of outputs. The guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those years. Early adoption is permitted using a prospective transition method. The Company adopted ASU 2017-01 effective October 1, 2016, which had no impact on the Company's consolidated financial statements. On February 23, 2017, the FASB issued ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets, or ASU 2017-05. ASU 2017-05 clarifies the scope of asset derecognition guidance and accounting for partial sales of nonfinancial assets. Partial sales of nonfinancial assets are common in the real estate industry and include transactions in which the seller retains an equity interest in the entity that owns the assets or has an equity interest in the buyer. ASU 2017-05 is effective for fiscal years beginning after December 15, 2017, including interim reporting periods within those fiscal years. Early adoption is permitted. The Company does not expect that the adoption of ASU 2017-05 will have a material impact on the consolidated financial statements. On August 28, 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities , or ASU 2017-12. The objectives of ASU 2017-12 are to (i) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (ii) reduce the complexity of and simplify the application of hedge accounting by preparers. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, and interim periods therein. Early adoption is permitted. The Company is in process of evaluating the impact of ASU 2017-12 will have on the Company’s consolidated financial statements.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation, with no effect on the Company’s consolidated financial position or results of operations. T he Company's assets, liabilities and operations related to the data center segment for the years presented in the financial statements are classified on the consolidated balance sheets and consolidated statements of comprehensive income as discontinued operations for all years presented.

Summary of Significant Accoun30

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Reconciliation of Cash, Cash Equivalents and Restricted Cash	The following table presents a reconciliation of the beginning of year and end of year cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the totals shown in the consolidated statements of cash flows : For the Year Ended Beginning of year: 2017 2016 2015 Cash and cash equivalents $ 42,613 $ 28,527 $ 113,093 Restricted cash (1) 14,992 14,543 14,116 Cash, cash equivalents and restricted cash $ 57,605 $ 43,070 $ 127,209 End of year: Cash and cash equivalents $ 336,500 $ 42,613 $ 28,527 Restricted cash (1) 15,414 14,992 14,543 Cash, cash equivalents and restricted cash $ 351,914 $ 57,605 $ 43,070 (1) Amount attributable to continuing and discontinued operations.
Schedule of Estimated Useful Lives of Assets by Class	The Company estimated the useful lives of its assets by class as follows: Buildings and improvements 15 – 40 years Tenant improvements Shorter of lease term or expected useful life Furniture, fixtures, and equipment 3 – 10 years

Discontinued Operations and D31

Discontinued Operations and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Dispositions - Discontinued Operations	The operations related to these assets have been included in discontinued operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 . Property Description Disposition Date Ownership Percentage Chicago Data Center (1) 12/14/2017 100% Richardson Data Center (2) 12/20/2017 100% 180 Peachtree Data Center (2) 12/20/2017 20.53% (3) Northwoods Data Center (2) 12/20/2017 100% Southfield Data Center (2) 12/20/2017 100% Plano Data Center (2) 12/20/2017 100% Arlington Data Center (2) 12/20/2017 100% Philadelphia Data Center (2) 12/20/2017 100% Raleigh Data Center (2) 12/20/2017 100% Leonia Data Center (2) 12/20/2017 100% AT&T Wisconsin Data Center (2) 12/20/2017 100% AT&T Tennessee Data Center (2) 12/20/2017 100% AT&T California Data Center (2) 12/20/2017 100% Charlotte Data Center (2) 12/20/2017 100% Alpharetta Data Center (2) 12/20/2017 100% (1) The Chicago Data Center was sold for aggregate consideration of $315,000,000 . The Company generated net proceeds on the sale of the Chicago Data Center of approximately $310,396,000 . (2) The property was sold as part of a 14 -property portfolio, or the Mapletree Portfolio, for aggregate consideration of $750,000,000 . The Company generated net proceeds on the sale of the Mapletree Portfolio of approximately $733,687,000 . (3) On January 3, 2012, an indirect partially-owned subsidiary of the Operating Partnership purchased the 180 Peachtree Data Center through a consolidated partnership with three unaffiliated institutional investors. The Operating Partnership owned approximately 20.53% and the institutional investors owned an aggregate of 79.47% of the consolidated partnership’s interests.
Schedule of Discontinued Operations	The following table presents the major classes of assets and liabilities of properties classified as discontinued operations presented separately in the consolidated balance sheets as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Assets: Real estate: Land $ 21,710 $ 97,111 Buildings and improvements, net 168,557 874,431 Total real estate, net 190,267 971,542 Acquired intangible assets, net 9,617 83,755 Other assets, net 13,949 38,168 Assets of discontinued operations, net $ 213,833 $ 1,093,465 Liabilities: Notes payable, net $ — $ 312,228 Accounts payable due to affiliates 175 236 Accounts payable and other liabilities 3,847 18,210 Intangible lease liabilities, net 1,036 30,731 Liabilities of discontinued operations, net $ 5,058 $ 361,405 The operations reflected in discontinued operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 were as follows (amounts in thousands): For the Year Ended 2017 2016 2015 Revenue: Rental and parking revenue $ 102,274 $ 102,663 $ 103,348 Tenant reimbursement revenue 14,009 14,300 14,520 Total revenue 116,283 116,963 117,868 Expenses: Rental and parking expenses 20,754 20,159 20,046 Change in fair value of contingent consideration (2,920 ) 300 (1,230 ) Acquisition related expenses — — 3 Asset management fees 8,106 8,549 8,405 Depreciation and amortization 32,210 38,744 40,282 Total expenses 58,150 67,752 67,506 Other income (expense): Interest expense, net (20,591 ) (14,532 ) (14,057 ) Total other expense (20,591 ) (14,532 ) (14,057 ) Income from discontinued operations before real estate dispositions and noncontrolling interest 37,542 34,679 36,305 Gain on real estate dispositions 224,133 — — Net income from discontinued operations 261,675 34,679 36,305 Net income from discontinued operations attributable to noncontrolling interests in consolidated partnerships (47,326 ) (3,921 ) (3,029 ) Net income from discontinued operations attributable to common stockholders $ 214,349 $ 30,758 $ 33,276
Schedule of Dispositions - Continuing Operations	The operations related to this asset have been included in continuing operations on the consolidated statements of comprehensive income for the years ended December 31, 2017 , 2016 and 2015 . Property Description Disposition Date Ownership Percentage Miami International Medical Center (1) 12/28/2017 100% (1) The Miami International Medical Center was sold for $88,000,000 . The Company generated net proceeds on the sale of the Miami International Medical Center of $87,499,000 . The net book value of the Miami International Medical Center at disposal was $93,435,000 , consisting of land in the amount of $8,694,000 and building and improvements in the amount of $84,741,000 . The Company recorded an impairment loss on real estate in continuing operations on the Miami International Medical Center of $5,936,000 , based on the contractual sale price (less cost of sale). The Miami International Medical Center was a part of the Company's healthcare segment.

Acquired Intangible Assets, N32

Acquired Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Schedule of Acquired Intangible Assets, Net	Acquired intangible assets, net, consisted of the following as of December 31, 2017 and 2016 (amounts in thousands, except weighted average life amounts): December 31, 2017 December 31, 2016 In-place leases, net of accumulated amortization of $22,519 and $16,557, respectively (with a weighted average remaining life of 15.1 years and 15.9 years, respectively) $ 83,139 $ 90,567 Above-market leases, net of accumulated amortization of $1,068 and $772, respectively (with a weighted average remaining life of 9.3 years and 10.3 years, respectively) 2,747 3,043 Ground lease interest, net of accumulated amortization of $53 and $40, respectively (with a weighted average remaining life of 87.6 years and 88.6 years, respectively) 1,052 1,065 $ 86,938 $ 94,675
Schedule of Estimated Future Amortization Expense of Acquired Intangible Assets	Estimated amortization expense on the acquired intangible assets as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 6,473 2019 6,473 2020 6,473 2021 6,473 2022 6,473 Thereafter 54,573 $ 86,938

Intangible Lease Liabilities,33

Intangible Lease Liabilities, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Intangible Lease Liabilities, Net [Abstract]
Schedule of Intangible Lease Liabilities, Net	Intangible lease liabilities, net, consisted of the following as of December 31, 2017 and 2016 (amounts in thousands, except weighted average life amounts): December 31, 2017 December 31, 2016 Below-market leases, net of accumulated amortization of $4,269 and $3,391, respectively (with a weighted average remaining life of 17.2 years and 18.0 years, respectively) $ 12,655 $ 13,643 Ground leasehold liabilities, net of accumulated amortization of $425 and $301, respectively (with a weighted average remaining life of 41.2 years and 42.2 years, respectively) 4,900 5,024 $ 17,555 $ 18,667
Schedule of Estimated Future Amortization Income of Intangible Lease Liabilities	Estimated amortization of the intangible lease liabilities as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 1,017 2019 1,017 2020 1,014 2021 1,014 2022 1,014 Thereafter 12,479 $ 17,555

Other Assets, Net (Tables)

Other Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Other Assets [Abstract]
Schedule of Other Assets, Net	Other assets, net consisted of the following as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Deferred financing costs related to the revolver portion of the unsecured credit facility, net of accumulated amortization of $7,428 and $5,833, respectively $ 762 $ 877 Lease commissions, net of accumulated amortization of $63 and $4, respectively 1,266 451 Investments in unconsolidated partnerships 965 113 Tenant receivables, net of allowances for doubtful accounts of $9,125 and $6,007, respectively 7,878 8,430 Notes receivable, net of allowances for loan losses of $16,230 and $4,294, respectively 20,138 15,128 Real estate-related notes receivable — 514 Straight-line rent receivable 36,348 27,611 Restricted cash 10,168 10,636 Derivative assets 407 2,967 Prepaid and other assets 1,208 844 $ 79,140 $ 67,571

Accounts Payable and Other Li35

Accounts Payable and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Other Liabilities	Accounts payable and other liabilities, as of December 31, 2017 and 2016 , were comprised of the following (amounts in thousands): December 31, 2017 December 31, 2016 Accounts payable and accrued expenses $ 4,203 $ 2,980 Accrued interest expense 1,558 1,776 Accrued property taxes 4,758 3,227 Distributions payable to stockholders 11,076 10,968 Tenant deposits 778 777 Deferred rental income 5,822 1,522 Derivative liabilities — 736 $ 28,195 $ 21,986

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Payable [Abstract]
Schedule of Notes Payable	The following table summarizes the notes payable balances as of December 31, 2017 and 2016 (amounts in thousands): Interest Rates (1) December 31, 2017 December 31, 2016 Range Weighted Maturity Date Fixed rate notes payable $ 18,212 $ 29,802 4.5% - 4.8% 4.6% 02/28/2018 - 10/11/2018 Variable rate notes payable fixed through interest rate swaps 83,066 102,021 4.8% - 6.3% 6.0% 07/11/2019 - 10/11/2022 Variable rate notes payable 40,199 41,604 4.6% - 5.7% 5.2% 01/26/2019 - 07/11/2019 Total notes payable, principal amount outstanding 141,477 173,427 Unamortized deferred financing costs related to notes payable (875 ) (1,385 ) Total notes payable, net of deferred financing costs (2) $ 140,602 $ 172,042 (1) Range of interest rates and weighted average interest rates are as of December 31, 2017 . (2) As of December 31, 2017 , there were no notes payable related to properties classified as discontinued operations. The balance as of December 31, 2016 excludes $312,228,000 of notes payable, net of deferred financing costs, related to properties classified as discontinued operations, which is included in liabilities of discontinued operations, net on the consolidated balance sheets .
Schedule of Future Principal Payments Due on Notes Payable	The principal payments due on the notes payable as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 23,147 (1) 2019 101,141 2020 597 2021 629 2022 15,963 Thereafter — $ 141,477 (1) Of this amount, $12,371,000 relates to a loan agreement that was repaid at maturity on February 28, 2018 .

Unsecured Credit Facility (Tabl

Unsecured Credit Facility (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Instrument [Line Items]
Schedule of Unsecured Credit Facility	The following table summarizes the unsecured credit facility balances as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 December 31, 2016 Revolving line of credit $ — $ 148,000 Term loan — 210,000 Total unsecured credit facility, principal amount outstanding — 358,000 Unamortized deferred financing costs related to the term loan of the unsecured credit facility — (1,789 ) Total unsecured credit facility, net of deferred financing costs $ — $ 356,211

Related-Party Transactions an38

Related-Party Transactions and Arrangements (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Schedule of Accounts Payable Due to Affiliates	The following amounts were due to affiliates as of December 31, 2017 and 2016 (amounts in thousands): Entity Fee December 31, 2017 December 31, 2016 Carter/Validus Advisors, LLC and its affiliates Asset management fees $ 980 $ 1,604 Carter Validus Real Estate Management Services, LLC Property management fees 473 593 Carter/Validus Advisors, LLC and its affiliates General, administrative and other costs 98 167 Carter/Validus Advisors, LLC and its affiliates Disposition fees 440 — Carter Validus Real Estate Management Services, LLC Construction management fees 17 35 Carter Validus Real Estate Management Services, LLC Leasing commissions 364 — $ 2,372 $ 2,399

Future Minimum Rent (Tables)

Future Minimum Rent (Tables)	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Schedule of Future Minimum Rental Income from Non-Cancelable Operating Leases	The future minimum rent to be received from the Company’s investments in real estate assets under non-cancelable operating leases, including properties qualified as discontinued operations and optional renewal periods for which exercise is reasonably assured, as of December 31, 2017 and for each of the next five years ending December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 95,549 2019 96,768 2020 97,245 2021 99,164 2022 100,854 Thereafter 961,507 $ 1,451,087
Schedule of Future Minimum Rental Payments Under Non-Cancelable Ground Leases	The future minimum rent obligations under non-cancelable ground leases as of December 31, 2017 and for each of the next five years ended December 31 and thereafter, are as follows (amounts in thousands): Year Amount 2018 $ 644 2019 688 2020 688 2021 688 2022 688 Thereafter 33,848 $ 37,244

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table shows the fair value of the Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis as of December 31, 2017 and 2016 (amounts in thousands): December 31, 2017 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Total Fair Assets: Derivative assets (1) $ — $ 407 $ — $ 407 Total assets at fair value $ — $ 407 $ — $ 407 December 31, 2016 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Total Fair Assets: Derivative assets (2) $ — $ 3,070 $ — $ 3,070 Total assets at fair value $ — $ 3,070 $ — $ 3,070 Liabilities: Derivative liabilities (3) $ — $ (1,247 ) $ — $ (1,247 ) Contingent consideration obligation (4) — — (5,640 ) (5,640 ) Total liabilities at fair value $ — $ (1,247 ) $ (5,640 ) $ (6,887 ) (1) Entire amount attributable to continuing operations. (2) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. Derivative assets attributable to continuing operations and discontinued operations are reported in other assets, net and assets of discontinued operations, net, respectively, on the consolidated balance sheets . (3) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. Derivative liabilities attributable to continuing operations and discontinued operations are reported in accounts payable and other liabilities and liabilities of discontinued operations, net, respectively, on the consolidated balance sheets . (4) Entire amount attributable to discontinued operations.
Schedule of Fair Value, Real Estate Assets Measured on Non-Recurring Basis	The following table shows the fair value of the Company's real estate assets measured at fair value on a non-recurring basis as of December 31, 2017 (amounts in thousands): December 31, 2017 Fair Value Hierarchy Quoted Prices in Active Significant Other Significant Re-Measured Balance Total Losses Real estate assets (1) $ — $ — $ 52,557 (2) $ 52,557 $ (33,211 ) (1) Amount represents the aggregate fair value of real estate assets impacted by impairment charges as of December 31, 2017. (2) The fair values relating to impairment assessments were based on a discounted cash flow model and a market approach model to value real properties, using comparable properties adjusted for differences in characteristics to estimate the fair value. Projected cash flows are comprised of projected rental revenues and expenses based upon market conditions and expectations for growth. Terminal capitalization rates, discount rates, market rate per square foot and annual growth rates utilized in these models are based on a reasonable range of current market rates for each property analyzed. Based upon these inputs, the Company determined that its valuations of properties using a discounted cash flow model and a market approach model are classified within Level 3 of the fair value hierarchy.
Schedule of Fair Value, Quantitative Information of Unobservable Inputs of Level 3 Real Estate	The following table sets forth quantitative information about the unobservable inputs of the Company’s Level 3 real estate recorded as of December 31, 2017 : Unobservable Inputs December 31, 2017 Terminal capitalization rate 8.5% Discount rate 8.7% Comparable sale price per square foot (1) $180 - $247 Market rental rate per square foot $37 Annual growth rate 2.0% (1) The comparable sale price per square foot is used under the market approach.
Schedule of Reconciliation of Fair Value of Recurring Level 3 Fair Value Measurements	The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): For the Year Ended 2017 2016 2015 Liabilities: Contingent consideration obligation: Beginning balance $ 5,640 $ 5,340 $ 6,570 Release of contingent consideration obligation related to property disposition (2,720 ) — — Total changes in fair value included in income from discontinued operations (2,920 ) 300 (1,230 ) Ending balance $ — $ 5,640 $ 5,340 Unrealized (gains) losses still held $ — $ — $ —

Derivative Instruments and He41

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of the Notional Amount and Fair Value of Derivative Instruments	The following table summarizes the notional amount and fair value of the Company’s derivative instruments (amounts in thousands): Derivatives Balance Effective Maturity December 31, 2017 December 31, 2016 Outstanding (2) Fair Value of Outstanding (3) Fair Value of Asset (2) (Liability) Asset (4) (Liability) (5) Interest rate swaps (1) 07/11/2014 to 05/28/2019 to $ 121,066 $ 407 $ — $ 540,425 $ 3,070 $ (1,247 ) (1) Derivative assets attributable to continuing operations and discontinued operations are reported in other assets, net and assets of discontinued operations, net, respectively, on the consolidated balance sheets . Derivative liabilities attributable to continuing operations and discontinued operations are reported in accounts payable and other liabilities and liabilities of discontinued operations, net, respectively, on the consolidated balance sheets . (2) Entire amount is attributable to continuing operations. (3) Of this amount, $312,021,000 is attributable to continuing operations and $228,404,000 is attributable to discontinued operations. (4) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (5) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations.
Schedule of Gains or Losses Recognized on Derivative Instruments	The table below summarizes the amount of income and loss recognized on interest rate derivatives designated as cash flow hedges for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Derivatives in Cash Flow Hedging Relationships Amount of Income (Loss) Recognized Location Of Loss (Income) Amount of Income (Loss) For the Year Ended December 31, 2017 Interest rate swaps - continuing operations $ 1,310 Interest expense, net $ 3,353 Interest rate swaps - discontinued operations 752 Income from discontinued operations 125 Total $ 2,062 $ 3,478 For the Year Ended December 31, 2016 Interest rate swaps - continuing operations $ 1,045 Interest expense, net $ (2,764 ) Interest rate swaps - discontinued operations (1,562 ) Income from discontinued operations (2,156 ) Total $ (517 ) $ (4,920 ) For the Year Ended December 31, 2015 Interest rate swaps - continuing operations $ (2,905 ) Interest expense, net $ (2,408 ) Interest rate swaps - discontinued operations (2,475 ) Income from discontinued operations (1,927 ) Total $ (5,380 ) $ (4,335 )
Schedule of Offsetting of Derivative Positions	The following table presents the effect on the Company’s financial position had the Company made the election to offset its derivative positions as of December 31, 2017 and 2016 (amounts in thousands): Offsetting of Derivative Assets Gross Amounts Not Offset Gross Gross Amounts Net Amounts of Financial Cash Net December 31, 2017 (1) $ 407 $ — $ 407 $ — $ — $ 407 December 31, 2016 $ 3,070 (2) $ — $ 3,070 (2) $ (10 ) (1) $ — $ 3,060 (3) Offsetting of Derivative Liabilities Gross Amounts Not Offset Gross Gross Amounts Net Amounts of Financial Cash Net December 31, 2017 $ — $ — $ — $ — $ — $ — December 31, 2016 $ 1,247 (4) $ — $ 1,247 (4) $ (10 ) (1) $ — $ 1,237 (5) (1) Entire amount is attributable to continuing operations. (2) Of this amount, $2,967,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (3) Of this amount, $2,957,000 is attributable to continuing operations and $103,000 is attributable to discontinued operations. (4) Of this amount, $736,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations. (5) Of this amount, $726,000 is attributable to continuing operations and $511,000 is attributable to discontinued operations.

Accumulated Other Comprehensi42

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss)	The following table presents a rollforward of amounts recognized in accumulated other comprehensive income (loss), net of noncontrolling interests, by component for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Unrealized Income (Loss) on Derivative Accumulated Other Balance as of December 31, 2014 $ (1,161 ) $ (1,161 ) Other comprehensive loss before reclassification (5,042 ) (5,042 ) Amount of loss reclassified from accumulated other comprehensive income (loss) to net income (effective portion) 4,103 4,103 Other comprehensive loss (939 ) (939 ) Purchase of noncontrolling interests — (480 ) Balance as of December 31, 2015 (2,100 ) (2,580 ) Other comprehensive loss before reclassification (517 ) (517 ) Amount of loss reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast) 4,920 4,920 Other comprehensive income 4,403 4,403 Balance as of December 31, 2016 2,303 1,823 Other comprehensive income before reclassification 2,062 2,062 Amount of income reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast) (3,478 ) (3,478 ) Other comprehensive loss (1,416 ) (1,416 ) Balance as of December 31, 2017 $ 887 $ 407
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	The following table presents reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2017 , 2016 and 2015 (amounts in thousands): Details about Accumulated Other Amounts Reclassified from Affected Line Items in the Consolidated Statements of Comprehensive For the Year Ended 2017 2016 2015 Interest rate swap contracts - continuing operations $ (3,353 ) $ 2,764 $ 2,408 Interest expense, net Interest rate swap contracts - discontinued operations (125 ) 2,156 1,927 Income from discontinued operations Interest rate swap contracts $ (3,478 ) $ 4,920 $ 4,335

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Shares of Restricted Common Stock Activity	A summary of the status of the nonvested shares of restricted common stock as of December 31, 2016 and the changes for the year ended December 31, 2017 is presented below: Restricted Stock Shares Nonvested at December 31, 2016 22,500 Vested (9,000 ) Granted 9,000 Nonvested at December 31, 2017 22,500

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Characterization of Distributions Paid to Stockholders	The following table shows the character of distributions the Company paid on a percentage basis during the years ended December 31, 2017 , 2016 and 2015 : For the Year Ended December 31, Character of Distributions: 2017 2016 2015 Ordinary dividends — % 45.45 % 46.69 % Capital gain distributions 100.00 % 3.20 % — % Nontaxable distributions — % 51.35 % 53.31 % Total 100.00 % 100.00 % 100.00 %

Selected Quarterly Financial 45

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Selected Quarterly Financial Data (Unaudited)	The Company believes that all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts stated below to present fairly, and in accordance with GAAP, the selected quarterly information (amounts in thousands, except shares and per share data): 2017 Fourth Third Second First Total revenue $ 22,984 $ 23,857 $ 25,877 $ 21,696 Total expenses (19,237 ) (15,263 ) (15,058 ) (14,849 ) Income from operations 3,747 8,594 10,819 6,847 Other expense (41,210 ) (12,286 ) (6,497 ) (7,052 ) (Loss) income from continuing operations (37,463 ) (3,692 ) 4,322 (205 ) Income from discontinued operations 231,964 10,636 8,886 10,189 Net income 194,501 6,944 13,208 9,984 Less: Net income attributable to noncontrolling interests in consolidated partnerships (44,308 ) (898 ) (1,039 ) (1,081 ) Net income attributable to common stockholders $ 150,193 $ 6,046 $ 12,169 $ 8,903 Net income (loss) per common share attributable to common stockholders: Basic: Continuing operations $ (0.21 ) $ (0.02 ) $ 0.03 $ — Discontinued operations 1.01 0.05 0.04 0.05 Net income attributable to common stockholders $ 0.80 $ 0.03 $ 0.07 $ 0.05 Diluted: Continuing operations $ (0.21 ) $ (0.02 ) $ 0.03 $ — Discontinued operations 1.01 0.05 0.04 0.05 Net income attributable to common stockholders $ 0.80 $ 0.03 $ 0.07 $ 0.05 Weighted average number of common shares outstanding: Basic 186,182,196 186,295,970 185,897,525 185,300,384 Diluted 186,182,196 186,295,970 185,911,968 185,300,384 2016 Fourth Third Second First Total revenue $ 18,901 $ 13,573 $ 29,915 $ 27,848 Total expenses (16,543 ) (29,102 ) (16,199 ) (13,593 ) Income (loss) from operations 2,358 (15,529 ) 13,716 14,255 Other expense (3,110 ) (2,983 ) (4,249 ) (3,980 ) (Loss) income from continuing operations (752 ) (18,512 ) 9,467 10,275 Income from discontinued operations 8,897 9,018 8,447 8,317 Net income (loss) 8,145 (9,494 ) 17,914 18,592 Less: Net income attributable to noncontrolling interests in consolidated partnerships (926 ) (1,006 ) (1,061 ) (928 ) Net income (loss) attributable to common stockholders $ 7,219 $ (10,500 ) $ 16,853 $ 17,664 Net income (loss) per common share attributable to common stockholders: Basic: Continuing operations $ — $ (0.10 ) $ 0.05 $ 0.06 Discontinued operations 0.04 0.04 0.04 0.04 Net income (loss) attributable to common stockholders $ 0.04 $ (0.06 ) $ 0.09 $ 0.10 Diluted: Continuing operations $ — $ (0.10 ) $ 0.05 $ 0.06 Discontinued operations 0.04 0.04 0.04 0.04 Net income (loss) attributable to common stockholders $ 0.04 $ (0.06 ) $ 0.09 $ 0.10 Weighted average number of common shares outstanding: Basic 184,628,066 183,726,479 182,743,182 181,975,405 Diluted 184,628,066 183,726,479 182,762,094 181,992,093

Organization and Business Ope46

Organization and Business Operations (Details)	Dec. 31, 2017USD ($)real_estate_investmentpropertyshares	May 22, 2017USD ($)$ / sharesshares	Nov. 25, 2015USD ($)$ / sharesshares	Jun. 06, 2014USD ($)	Apr. 14, 2014USD ($)$ / sharesshares	Dec. 31, 2017USD ($)real_estate_investmentsegmentproperty	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Feb. 15, 2018$ / shares	Feb. 01, 2018$ / shares
Organization and Business Operations [Line Items]
Number of properties disposed | property						16
Sale price of properties disposed	$ 1,153,000,000					$ 1,153,000,000
Proceeds from real estate disposals						$ 1,131,582,000	$ 0	$ 0
Number of reportable business segments | segment						1
Redemption of common stock						$ 57,049,000	$ 33,335,000	$ 9,461,000
Number of Company owned real estate investments | real_estate_investment	34					34
Number of Company owned properties | property	68					68
Initial Public Offering [Member]
Organization and Business Operations [Line Items]
Common stock offering, gross proceeds raised				$ 1,716,046,000
First DRIP Offering [Member]
Organization and Business Operations [Line Items]
Common stock offering pursuant to DRIP, shares registered | shares					10,526,315
Share price (in dollars per share) | $ / shares					$ 9.50
Common stock offering pursuant to DRIP, value					$ 100,000,000
Second DRIP Offering [Member]
Organization and Business Operations [Line Items]
Common stock offering pursuant to DRIP, shares registered | shares			10,473,946
Share price (in dollars per share) | $ / shares			$ 9.5475
Common stock offering pursuant to DRIP, value			$ 100,000,000
Second DRIP Offering [Member] | Maximum [Member]
Organization and Business Operations [Line Items]
Share price (in dollars per share) | $ / shares			$ 9.50
Reinvestment in additional shares at percentage of fair market value per share			95.00%
Third DRIP Offering [Member]
Organization and Business Operations [Line Items]
Common stock offering pursuant to DRIP, shares registered | shares		11,387,512
Share price (in dollars per share) | $ / shares		$ 9.519
Common stock offering pursuant to DRIP, value		$ 108,397,727
Third DRIP Offering [Member] | Subsequent Event [Member]
Organization and Business Operations [Line Items]
Share price (in dollars per share) | $ / shares									$ 6.26	$ 9.26
Third DRIP Offering [Member] | Maximum [Member]
Organization and Business Operations [Line Items]
Share price (in dollars per share) | $ / shares		$ 9.50
Reinvestment in additional shares at percentage of fair market value per share		95.00%
Initial Public Offering and DRIP Offerings [Member]
Organization and Business Operations [Line Items]
Common stock offering, gross proceeds raised	$ 1,946,761,000
Common stock offering, shares issued | shares	196,826,000
Redemption of common stock	$ 104,911,000
Offering costs, selling commissions and dealer manager fees	$ 174,845,000
Data Centers [Member]
Organization and Business Operations [Line Items]
Number of properties disposed | property						15
Data Centers [Member] | Consolidated Partnership [Member]
Organization and Business Operations [Line Items]
Number of properties disposed | property						1
Healthcare [Member]
Organization and Business Operations [Line Items]
Number of properties disposed | property						1

Summary of Significant Accoun47

Summary of Significant Accounting Policies (Narrative) (Details)	Jan. 02, 2018USD ($)	Dec. 31, 2017USD ($)variable_interest_entitiesmetropolitantenant$ / sharesshares	Dec. 28, 2017property	Dec. 31, 2017USD ($)Intangible_Liabilityintangible_assetvariable_interest_entitiesmetropolitansegmentpropertytenant$ / sharesshares	Dec. 31, 2016USD ($)intangible_assettenant$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014shares
Summary of Significant Accounting Policies [Line Items]
Number of variable interest entities, primary beneficiary | variable_interest_entities		1		1
Net cash (used in) provided by financing activities				$ (903,800,000)	$ (89,468,000)	$ 132,518,000
Net cash provided by operating activities				105,278,000	122,821,000	107,659,000
Acquisition fees and expenses expensed				0	1,667,000	3,693,000
Acquisition fees and expenses capitalized				$ 0	0	0
Number of properties with impaired real estate assets | property			1	4
Impairment loss on real estate				$ 39,147,000	$ 0	0
Sale price of properties disposed		$ 1,153,000,000		$ 1,153,000,000
Number of impaired intangible liabilities | Intangible_Liability				1
Impairment of intangible liabilities				$ 86,000
Number of tenants experiencing financial difficulties | tenant					2
Provision for doubtful accounts				20,755,000	$ 26,177,000	3,376,000
Notes receivable before allowances for loan losses		$ 36,368,000		36,368,000	19,422,000
Provision for loan losses				$ 11,936,000	4,294,000	0
Number of notes receivable nonperforming | tenant				2
Impact related to uncertain tax positions from the results of operations				$ 0	$ 0	0
Number of metropolitan statistical areas in which Company owns real estate investments | metropolitan		38		38
Shares authorized | shares		350,000,000		350,000,000
Common stock, shares authorized | shares		300,000,000		300,000,000	300,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.01		$ 0.01	$ 0.01
Preferred stock, shares authorized | shares		50,000,000		50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01		$ 0.01	$ 0.01
Common stock, shares issued | shares		196,892,945		196,892,945	189,848,165
Common stock, shares outstanding | shares		186,181,545		186,181,545	184,909,673
Preferred stock, shares issued | shares		0		0	0
Preferred stock, shares outstanding | shares		0		0	0
Period of notice required for changes to share repurchase program				30 days
Maximum number of shares available for repurchase during any calendar year, as percentage of common stock outstanding at end of prior year				5.00%
Repurchase of common stock, percentage				3.12%	1.89%
Repurchase of common stock				$ 57,049,000	$ 33,335,000	9,461,000
Repurchase of common stock, average price per share (in dollars per share) | $ / shares				$ 9.88	$ 9.71
Aggregate distributions paid		$ 509,989,000
Distributions paid in cash		241,512,000		$ 63,082,000	$ 60,038,000	56,775,000
Common stock issued through distribution reinvestment plan		268,477,000		$ 66,993,000	$ 68,086,000	$ 67,821,000
Distributions declared per common share (in dollars per share) | $ / shares				$ 0.70	$ 0.70	$ 0.70
Distributions payable to stockholders		$ 11,076,000		$ 11,076,000	$ 10,968,000
Diluted earnings per share outstanding adjustment (in shares) | shares					18,000	18,000
Number of reportable business segments | segment				1
Subsequent Event [Member] | December 1, 2017 To December 31, 2017 [Member]
Summary of Significant Accounting Policies [Line Items]
Aggregate distributions paid	$ 11,076,000
Distributions paid in cash	5,468,000
Common stock issued through distribution reinvestment plan	$ 5,608,000
Common Stock [Member]
Summary of Significant Accounting Policies [Line Items]
Common stock, shares outstanding | shares		186,181,545		186,181,545	184,909,673	181,200,952	175,038,055
Repurchase of common stock (in shares) | shares				5,772,909	3,431,543	983,323
Repurchase of common stock				$ 58,000	$ 34,000	$ 10,000
Common stock issued through distribution reinvestment plan				$ 71,000	$ 71,000	$ 72,000
Rental Revenue from Continuing Operations [Member] | Healthcare [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				100.00%
Rental Revenue from Continuing Operations [Member] | Geographic Concentration Risk [Member]
Summary of Significant Accounting Policies [Line Items]
Number of metropolitan statistical areas in which Company owns real estate investments | metropolitan		3		3
Rental Revenue from Continuing Operations [Member] | Geographic Concentration Risk [Member] | Houston-The Woodlands-Sugar Land, Texas MSA [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				21.30%
Rental Revenue from Continuing Operations [Member] | Geographic Concentration Risk [Member] | San Antonio-New Braunfels, Texas MSA [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.20%
Rental Revenue from Continuing Operations [Member] | Geographic Concentration Risk [Member] | Dallas-Ft. Worth-Arlington, Texas MSA [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.20%
Rental Revenue from Continuing Operations [Member] | Customer Concentration Risk [Member]
Summary of Significant Accounting Policies [Line Items]
Number of tenants | tenant		3		3
Rental Revenue from Continuing Operations [Member] | Customer Concentration Risk [Member] | Bay Area Regional Medical Center, LLC [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				20.90%
Rental Revenue from Continuing Operations [Member] | Customer Concentration Risk [Member] | Post Acute Medical LLC [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				12.00%
Rental Revenue from Continuing Operations [Member] | Customer Concentration Risk [Member] | 21st Century Oncology, Inc [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.00%
Consolidated Revenues from Continuing Operations [Member] | Healthcare [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage				100.00%	100.00%	100.00%
In-place leases [Member]
Summary of Significant Accounting Policies [Line Items]
Number of impaired intangible assets | intangible_asset				3	1
Impairment of intangible asset				$ 1,151,000
Leasing commissions [Member]
Summary of Significant Accounting Policies [Line Items]
Number of impaired intangible assets | intangible_asset					1
In-place leases and capitalized lease commissions [Member]
Summary of Significant Accounting Policies [Line Items]
Impairment of intangible asset					$ 16,400,000
Dispositions - Continuing Operations [Member]
Summary of Significant Accounting Policies [Line Items]
Impairment loss on real estate				5,936,000
Sale price of properties disposed		$ 88,000,000		88,000,000
Real estate assets [Member]
Summary of Significant Accounting Policies [Line Items]
Real estate assets, fair value		52,557,000		52,557,000
Significant Unobservable Inputs (Level 3) [Member]
Summary of Significant Accounting Policies [Line Items]
Impairment loss on real estate				33,211,000
Significant Unobservable Inputs (Level 3) [Member] | Real estate assets [Member]
Summary of Significant Accounting Policies [Line Items]
Real estate assets, fair value		$ 52,557,000		52,557,000	85,768,000
Business Combinations [Member]
Summary of Significant Accounting Policies [Line Items]
Acquisition fees and expenses expensed				$ 0	1,667,000	$ 3,473,000
ASU 2016-18 [Member]
Summary of Significant Accounting Policies [Line Items]
Net cash (used in) provided by financing activities					221,000	279,000
Net cash provided by operating activities					228,000	$ 148,000
ASU 2016-15 [Member]
Summary of Significant Accounting Policies [Line Items]
Net cash (used in) provided by financing activities					(790,000)
Net cash provided by operating activities					$ 790,000

Summary of Significant Accoun48

Summary of Significant Accounting Policies (Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Cash and cash equivalents	$ 336,500	$ 42,613	$ 28,527	$ 113,093
Restricted cash	15,414	14,992	14,543	14,116
Cash, cash equivalents and restricted cash	$ 351,914	$ 57,605	$ 43,070	$ 127,209

Summary of Significant Accoun49

Summary of Significant Accounting Policies (Schedule of Estimated Useful Lives of Assets by Class) (Details)	12 Months Ended
	Dec. 31, 2017
Building and improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Building and improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Furniture, fixtures, and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, fixtures, and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years

Discontinued Operations and D50

Discontinued Operations and Dispositions (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed | property	16
Number of properties owned | property	68
Sale price of properties disposed	$ 1,153,000
Proceeds from real estate disposals	1,131,582	$ 0	$ 0
Gain on real estate dispositions	224,133	0	0
Impairment loss on real estate	39,147	0	0
Capital expenditures attributable to discontinued operations	2,264	$ 31,791	$ 6,621
Dispositions - Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of properties disposed	88,000
Impairment loss on real estate	$ 5,936
Data Centers [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed | property	15
Data Centers [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed | property	15
Number of properties owned | property	5
Data Centers [Member] | Dispositions - Discontinued Operations [Member] | Income from Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on real estate dispositions	$ 224,133
Healthcare [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed | property	1
Healthcare [Member] | Dispositions - Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed | property	1
Healthcare [Member] | Dispositions - Continuing Operations [Member] | Net Income from Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on real estate	$ 5,936

Discontinued Operations and D51

Discontinued Operations and Dispositions (Schedule of Dispositions - Discontinued Operations) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Jan. 03, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of properties disposed	$ 1,153,000
Proceeds from real estate disposals	$ 1,131,582	$ 0	$ 0
Number of properties disposed | property	16
Chicago Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 14, 2017
Ownership Percentage	1
Sale price of properties disposed	$ 315,000
Proceeds from real estate disposals	310,396
Mapletree Portfolio [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of properties disposed	750,000
Proceeds from real estate disposals	$ 733,687
Number of properties disposed | property	14
Richardson Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
180 Peachtree Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	0.2053
Ownership Percentage by Operating Partnership				20.53%
Ownership Percentage by Unaffiliated Investors				79.47%
Northwoods Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Southfield Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Plano Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Arlington Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Philadelphia Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Raleigh Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Leonia Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
AT&T Wisconsin Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
AT&T Tennessee Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
AT&T California Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Charlotte Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1
Alpharetta Data Center [Member] | Dispositions - Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 20, 2017
Ownership Percentage	1

Discontinued Operations and D52

Discontinued Operations and Dispositions (Schedule of Discontinued Operations - Major Classes of Assets and Liabilities of Discontinued Operations) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Land	$ 21,710	$ 97,111
Buildings and improvements, net	168,557	874,431
Total real estate, net	190,267	971,542
Acquired intangible assets, net	9,617	83,755
Other assets, net	13,949	38,168
Assets of discontinued operations, net	213,833	1,093,465
Liabilities:
Notes payable, net	0	312,228
Accounts payable due to affiliates	175	236
Accounts payable and other liabilities	3,847	18,210
Intangible lease liabilities, net	1,036	30,731
Liabilities of discontinued operations, net	$ 5,058	$ 361,405

Discontinued Operations and D53

Discontinued Operations and Dispositions (Schedule of Discontinued Operations - Operations of Discontinued Operations) (Details) - USD ($) $ 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
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Rental and parking revenue									$ 102,274	$ 102,663	$ 103,348
Tenant reimbursement revenue									14,009	14,300	14,520
Total revenue									116,283	116,963	117,868
Rental and parking expenses									20,754	20,159	20,046
Change in fair value of contingent consideration									(2,920)	300	(1,230)
Acquisition related expenses									0	0	3
Asset management fees									8,106	8,549	8,405
Depreciation and amortization									32,210	38,744	40,282
Total expenses									58,150	67,752	67,506
Interest expense, net									(20,591)	(14,532)	(14,057)
Total other expense									(20,591)	(14,532)	(14,057)
Income from discontinued operations before real estate dispositions and noncontrolling interest									37,542	34,679	36,305
Gain on real estate dispositions									224,133	0	0
Net income from discontinued operations	$ 231,964	$ 10,636	$ 8,886	$ 10,189	$ 8,897	$ 9,018	$ 8,447	$ 8,317	261,675	34,679	36,305
Net income from discontinued operations attributable to noncontrolling interests in consolidated partnerships									(47,326)	(3,921)	(3,029)
Net income from discontinued operations attributable to common stockholders									$ 214,349	$ 30,758	$ 33,276

Discontinued Operations and D54

Discontinued Operations and Dispositions (Schedule of Dispositions - Continuing Operations) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 27, 2017USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of properties disposed	$ 1,153,000
Proceeds from real estate disposals	1,131,582	$ 0	$ 0
Total real estate, net	908,188	1,039,330
Land	73,769	84,849
Buildings and improvements, net	834,419	938,338
Impairment loss on real estate	39,147	$ 0	$ 0
Dispositions - Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of properties disposed	88,000
Impairment loss on real estate	5,936
Dispositions - Continuing Operations [Member] | Healthcare [Member] | Net Income from Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on real estate	$ 5,936
Miami International Medical Center [Member] | Dispositions - Continuing Operations [Member] | Healthcare [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition Date	Dec. 28, 2017
Ownership Percentage	1
Sale price of properties disposed	$ 88,000
Proceeds from real estate disposals	87,499
Total real estate, net				$ 93,435
Land				8,694
Buildings and improvements, net				$ 84,741
Miami International Medical Center [Member] | Dispositions - Continuing Operations [Member] | Healthcare [Member] | Net Income from Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on real estate	$ 5,936

Acquired Intangible Assets, N55

Acquired Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Depreciation and amortization	$ 33,540	$ 47,591	$ 30,429
In-place leases, Ground lease interest and Above-market leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Depreciation and amortization	$ 7,737	$ 21,446	$ 9,572

Acquired Intangible Assets, N56

Acquired Intangible Assets, Net (Schedule of Acquired Intangible Assets, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible asset, net of accumulated amortization	$ 86,938	$ 94,675
Acquired intangible asset, accumulated amortization	$ 23,640	$ 17,369
Acquired intangible asset, weighted average remaining life	15 years 9 months 18 days	16 years 7 months 6 days
In-place leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible asset, net of accumulated amortization	$ 83,139	$ 90,567
Acquired intangible asset, accumulated amortization	$ 22,519	$ 16,557
Acquired intangible asset, weighted average remaining life	15 years 1 month 6 days	15 years 10 months 24 days
Above-market leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible asset, net of accumulated amortization	$ 2,747	$ 3,043
Acquired intangible asset, accumulated amortization	$ 1,068	$ 772
Acquired intangible asset, weighted average remaining life	9 years 3 months 18 days	10 years 3 months 18 days
Ground lease interest [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible asset, net of accumulated amortization	$ 1,052	$ 1,065
Acquired intangible asset, accumulated amortization	$ 53	$ 40
Acquired intangible asset, weighted average remaining life	87 years 7 months 6 days	88 years 7 months 6 days

Acquired Intangible Assets, N57

Acquired Intangible Assets, Net (Schedule of Estimated Future Amortization Expense of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	$ 6,473
2,019	6,473
2,020	6,473
2,021	6,473
2,022	6,473
Thereafter	54,573
Total	$ 86,938	$ 94,675

Intangible Lease Liabilities,58

Intangible Lease Liabilities, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible Lease Liabilities, Net [Abstract]
Amortization of intangible liabilities	$ 1,112	$ 1,078	$ 1,086

Intangible Lease Liabilities,59

Intangible Lease Liabilities, Net (Schedule of Intangible Lease Liabilities, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Intangible Lease Liabilities, Net [Abstract]
Below-market leases, net of accumulated amortization of $4,269 and $3,391, respectively (with a weighted average remaining life of 17.2 years and 18.0 years, respectively)	$ 12,655	$ 13,643
Ground leasehold liabilities, net of accumulated amortization of $425 and $301, respectively (with a weighted average remaining life of 41.2 years and 42.2 years, respectively)	4,900	5,024
Total intangible lease liabilities, net	17,555	18,667
Below-market leases, accumulated amortization	$ 4,269	$ 3,391
Below-market leases, weighted average remaining life	17 years 2 months 12 days	18 years
Ground leasehold liabilities, accumulated amortization	$ 425	$ 301
Ground leasehold liabilities, weighted average remaining life	41 years 2 months 12 days	42 years 2 months 12 days
Intangible lease liabilities, weighted average remaining life	23 years 10 months 24 days	24 years 6 months

Intangible Lease Liabilities,60

Intangible Lease Liabilities, Net (Schedule of Estimated Future Amortization Income of Intangible Lease Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Intangible Lease Liabilities, Net [Abstract]
2,018	$ 1,017
2,019	1,017
2,020	1,014
2,021	1,014
2,022	1,014
Thereafter	12,479
Total intangible lease liabilities, net	$ 17,555	$ 18,667

Other Assets, Net (Narrative) (

Other Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Amortization of deferred financing costs related to the revolver portion of the unsecured credit facility	$ 1,595	$ 2,143	$ 1,618
Amortization of lease commissions	$ 59	99	$ 34
Impairment of lease commissions		$ 1,766

Other Assets, Net (Schedule of

Other Assets, Net (Schedule of Other Assets, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Assets [Abstract]
Deferred financing costs related to the revolver portion of the unsecured credit facility, net of accumulated amortization of $7,428 and $5,833, respectively	$ 762	$ 877
Lease commissions, net of accumulated amortization of $63 and $4, respectively	1,266	451
Investments in unconsolidated partnerships	965	113
Tenant receivables, net of allowances for doubtful accounts of $9,125 and $6,007, respectively	7,878	8,430
Notes receivable, net of allowances for loan losses of $16,230 and $4,294, respectively	20,138	15,128
Real estate-related notes receivable	0	514
Straight-line rent receivable	36,348	27,611
Restricted cash	10,168	10,636
Derivative assets	407	2,967
Prepaid and other assets	1,208	844
Total other assets, net	79,140	67,571
Deferred financing costs related to the revolver portion of the unsecured credit facility, accumulated amortization	7,428	5,833
Lease commissions, accumulated amortization	63	4
Tenant receivables, allowances for doubtful accounts	9,125	6,007
Notes receivable, allowances for loan losses	$ 16,230	$ 4,294

Accounts Payable and Other Li63

Accounts Payable and Other Liabilities (Schedule of Accounts Payable and Other Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accounts payable and accrued expenses	$ 4,203	$ 2,980
Accrued interest expense	1,558	1,776
Accrued property taxes	4,758	3,227
Distributions payable to stockholders	11,076	10,968
Tenant deposits	778	777
Deferred rental income	5,822	1,522
Derivative liabilities	0	736
Accounts payable and other liabilities	$ 28,195	$ 21,986

Notes Payable (Narrative) (Deta

Notes Payable (Narrative) (Details) $ in Thousands	Aug. 18, 2017USD ($)	Jun. 28, 2017USD ($)	Feb. 10, 2017USD ($)	Dec. 31, 2017USD ($)loan	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Notes payable, principal amount outstanding				$ 141,477	$ 173,427
Debt, Weighted Average Interest Rate				5.60%
Payments on notes payable	$ 15,162	$ 5,337	$ 5,645	$ 345,335	56,521	$ 11,882
Loss on debt extinguishment				4,513	$ 1,133	$ 0
Discontinued Operations [Member]
Debt Instrument [Line Items]
Payments on notes payable				$ 307,315
Number of notes payable paid off | loan				6
Loss on debt extinguishment				$ 7,287

Notes Payable (Schedule of Note

Notes Payable (Schedule of Notes Payable) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Notes payable, principal amount outstanding	$ 141,477,000	$ 173,427,000
Unamortized deferred financing costs related to notes payable	(875,000)	(1,385,000)
Notes payable, net of deferred financing costs	$ 140,602,000	172,042,000
Debt, Weighted Average Interest Rate	5.60%
Discontinued Operations [Member]
Debt Instrument [Line Items]
Notes payable, net of deferred financing costs	$ 0	312,228,000
Fixed Rate [Member]
Debt Instrument [Line Items]
Notes payable, principal amount outstanding	$ 18,212,000	29,802,000
Debt, Weighted Average Interest Rate	4.60%
Maturity Date Range, Start	Feb. 28, 2018
Maturity Date Range, End	Oct. 11, 2018
Fixed Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate	4.50%
Fixed Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate	4.80%
Variable Rate Debt, Subject To Interest Rate Swap [Member]
Debt Instrument [Line Items]
Notes payable, principal amount outstanding	$ 83,066,000	102,021,000
Debt, Weighted Average Interest Rate	6.00%
Maturity Date Range, Start	Jul. 11, 2019
Maturity Date Range, End	Oct. 11, 2022
Variable Rate Debt, Subject To Interest Rate Swap [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate	4.80%
Variable Rate Debt, Subject To Interest Rate Swap [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate	6.30%
Variable Rate [Member]
Debt Instrument [Line Items]
Notes payable, principal amount outstanding	$ 40,199,000	$ 41,604,000
Debt, Weighted Average Interest Rate	5.20%
Maturity Date Range, Start	Jan. 26, 2019
Maturity Date Range, End	Jul. 11, 2019
Variable Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate	4.60%
Variable Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate	5.70%

Notes Payable (Schedule of Futu

Notes Payable (Schedule of Future Principal Payments Due on Notes Payable) (Details) - USD ($) $ in Thousands	Feb. 28, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
2,018		$ 23,147
2,019		101,141
2,020		597
2,021		629
2,022		15,963
Thereafter		0
Total		141,477
Note Payable One [Member]
Debt Instrument [Line Items]
2,018		$ 12,371
Note Payable One [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Notes payable, repayment date	Feb. 28, 2018

Unsecured Credit Facility (Narr

Unsecured Credit Facility (Narrative) (Details)	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 30, 2017extension	Dec. 31, 2017USD ($)extension	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Credit facility, maximum commitments available		$ 353,606,000	$ 353,606,000
Credit facility, principal outstanding		0	$ 0	$ 358,000,000
Credit facility, properties added to unencumbered pool | property			3
Credit facility, increase in unencumbered pool availability			$ 21,906,000
Credit facility, properties removed from unencumbered pool | property			29
Credit facility, decrease in unencumbered pool availability			$ 184,813,000
Proceeds from credit facility			121,000,000	185,000,000	$ 245,000,000
Payments on credit facility			479,000,000	120,000,000	27,000,000
Gain on debt extinguishment			(4,513,000)	(1,133,000)	$ 0
Credit facility, total unencumbered pool availability including covenant restriction		236,667,000	236,667,000
Credit facility, amount remaining to be drawn		236,667,000	$ 236,667,000
Healthcare [Member]
Line of Credit Facility [Line Items]
Credit facility, properties removed from unencumbered pool | property			20
Data Centers [Member]
Line of Credit Facility [Line Items]
Credit facility, properties removed from unencumbered pool | property			9
Revolving Line of Credit [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum commitments available		$ 400,000,000	$ 400,000,000
Credit facility, maturity date	May 28, 2017	May 28, 2018
Credit facility, number of maturity extension periods | extension	1	2
Credit facility, available extension period	12 months	12 months
Credit facility, principal outstanding		$ 0	0	148,000,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Credit facility, principal outstanding		0	0	$ 210,000,000
Term Loan One [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum commitments available		75,000,000	$ 75,000,000
Credit facility, maturity date			May 28, 2018
Credit facility, available extension period			12 months
Term Loan Two [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum commitments available		135,000,000	$ 135,000,000
Credit facility, maturity date			Aug. 21, 2020
Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum commitments available		$ 610,000,000	$ 610,000,000
Credit facility, threshold percentage for unused portion of lenders' commitments			50.00%
Gain on debt extinguishment			$ 2,774,000
Unsecured Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility, unused portion, commitment fee percentage			0.15%
Unsecured Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, unused portion, commitment fee percentage			0.25%
Unsecured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility, basis spread on variable rate			1.75%
Unsecured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, basis spread on variable rate			2.25%
Unsecured Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility, basis spread on variable rate			0.75%
Unsecured Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, basis spread on variable rate			1.25%

Unsecured Credit Facility (Sche

Unsecured Credit Facility (Schedule of Unsecured Credit Facility) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Line of Credit Facility [Line Items]
Unsecured credit facility, principal amount outstanding	$ 0	$ 358,000
Unamortized deferred financing costs related to the term loan of the unsecured credit facility	0	(1,789)
Unsecured credit facility, net of deferred financing costs	0	356,211
Revolving Line of Credit [Member]
Line of Credit Facility [Line Items]
Unsecured credit facility, principal amount outstanding	0	148,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Unsecured credit facility, principal amount outstanding	$ 0	$ 210,000

Related-Party Transactions an69

Related-Party Transactions and Arrangements (Narrative) (Details)	Dec. 31, 2017USD ($)employee	Dec. 31, 2017USD ($)employeeproperty	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Related Party Transaction [Line Items]
Asset management fees incurred		$ 10,611,000	$ 10,956,000	$ 9,622,000
Number of direct employees | employee	0	0
Cumulative non-compounded annual return rate to investors, as a percent		8.00%
Carter/Validus Advisors, LLC [Member]
Related Party Transaction [Line Items]
Annual asset management fee, as percentage of aggregate asset value plus costs and expenses incurred by Advisor		0.85%
Monthly asset management fee, as percentage of aggregate asset value as of the last day of the immediately preceding month		0.07083%
Asset management fees incurred		$ 18,717,000	19,505,000	18,027,000
Operating expenses allocated to the Company by the advisor		$ 1,598,000	1,793,000	1,338,000
Percentage of remaining net sales proceeds Advisor will receive after investors receive return		15.00%
Listing fee percentage		15.00%
Distribution percentage upon termination of Advisory agreement		15.00%
Carter/Validus Advisors, LLC [Member] | Continuing Operations [Member]
Related Party Transaction [Line Items]
Asset management fees incurred		$ 10,611,000	10,956,000	9,622,000
Carter/Validus Advisors, LLC And/Or Its Affiliates [Member]
Related Party Transaction [Line Items]
Minimum number of properties required to be sold to incur brokerage commission | property		1
Maximum brokerage commission paid by Company, as percentage of contract sales price		6.00%
Disposition fees incurred		$ 4,311,000
Subordinated participation in net sale proceeds	$ 0
Subordinated incentive listing fees incurred	0
Subordinated termination fees	$ 0
Carter/Validus Advisors, LLC And/Or Its Affiliates [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Disposition fee, as percentage of contract sales price		0.50%
Percentage of brokerage commission paid by Company for properties sold that required a substantial amount of services		50.00%
Carter Validus Real Estate Management Services, LLC [Member]
Related Party Transaction [Line Items]
Leasing and management fees, as percentage of gross revenues from single-tenant properties		3.00%
Leasing and management fees, as percentage of gross revenues from multi-tenant properties		4.00%
Oversight fee, as percentage of gross revenues from properties managed		1.00%
Property management fees incurred		$ 5,056,000	5,425,000	4,811,000
Leasing commissions incurred		644,000	1,138,000	2,934,000
Construction management fees		$ 524,000	986,000	2,058,000
Carter Validus Real Estate Management Services, LLC [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Construction management fee, as percentage of cost of project		5.00%
Carter Validus Real Estate Management Services, LLC [Member] | Continuing Operations [Member]
Related Party Transaction [Line Items]
Property management fees incurred		$ 2,542,000	$ 2,945,000	$ 2,371,000

Related-Party Transactions An70

Related-Party Transactions And Arrangements (Schedule of Accounts Payable Due to Affiliates) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Accounts payable due to affiliates	$ 2,372	$ 2,399
Carter/Validus Advisors, LLC And/Or Its Affiliates [Member] | Asset Management Fees [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	980	1,604
Carter/Validus Advisors, LLC And/Or Its Affiliates [Member] | General, Administrative and Other Costs [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	98	167
Carter/Validus Advisors, LLC And/Or Its Affiliates [Member] | Disposition Fees [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	440	0
Carter Validus Real Estate Management Services, LLC [Member] | Property Management Fees [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	473	593
Carter Validus Real Estate Management Services, LLC [Member] | Construction Management Fees [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	17	35
Carter Validus Real Estate Management Services, LLC [Member] | Leasing Commissions [Member]
Related Party Transaction [Line Items]
Accounts payable due to affiliates	$ 364	$ 0

Future Minimum Rent (Schedule o

Future Minimum Rent (Schedule of Future Minimum Rental Income from Non-Cancelable Operating Leases) (Details) $ in Thousands	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 95,549
2,019	96,768
2,020	97,245
2,021	99,164
2,022	100,854
Thereafter	961,507
Total	$ 1,451,087

Future Minimum Rent (Schedule72

Future Minimum Rent (Schedule of Future Minimum Rental Payments Under Non-Cancelable Ground Leases) (Details) $ in Thousands	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 644
2,019	688
2,020	688
2,021	688
2,022	688
Thereafter	33,848
Total	$ 37,244

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) $ in Thousands	Dec. 28, 2017property	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)
Fair Value [Line Items]
Notes payable, principal amount outstanding		$ 141,477	$ 173,427
Unsecured credit facility, principal amount outstanding		$ 0	358,000
Number of properties with impaired real estate assets | property	1	4
Real estate assets [Member]
Fair Value [Line Items]
Real estate assets, fair value		$ 52,557
Significant Other Observable Inputs (Level 2) [Member] | Real estate assets [Member]
Fair Value [Line Items]
Real estate assets, fair value		0
Significant Unobservable Inputs (Level 3) [Member] | Real estate assets [Member]
Fair Value [Line Items]
Real estate assets, fair value		52,557	85,768
Fixed Rate [Member]
Fair Value [Line Items]
Notes payable, principal amount outstanding		18,212	29,802
Fixed Rate [Member] | Significant Other Observable Inputs (Level 2) [Member] | Estimated Fair Value [Member]
Fair Value [Line Items]
Notes payable, fair value disclosure		18,189	29,683
Variable Rate Debt, Subject To Interest Rate Swap [Member]
Fair Value [Line Items]
Notes payable, principal amount outstanding		83,066	102,021
Unsecured credit facility, principal amount outstanding		0	210,000
Variable Rate Debt, Subject To Interest Rate Swap [Member] | Significant Other Observable Inputs (Level 2) [Member] | Estimated Fair Value [Member]
Fair Value [Line Items]
Notes payable, fair value disclosure		82,533	104,006
Credit facility, fair value disclosure		0	203,055
Variable Rate [Member]
Fair Value [Line Items]
Notes payable, principal amount outstanding		40,199	41,604
Unsecured credit facility, principal amount outstanding		$ 0	$ 148,000

Fair Value (Schedule of Fair Va

Fair Value (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Derivative assets	$ 407	$ 2,967
Liabilities:
Derivative liabilities	0	(736)
Recurring Basis [Member]
Assets:
Derivative assets	407	3,070
Total assets at fair value	407	3,070
Liabilities:
Derivative liabilities		(1,247)
Contingent consideration obligation		(5,640)
Total liabilities at fair value		(6,887)
Recurring Basis [Member] | Continuing Operations [Member]
Assets:
Derivative assets		2,967
Liabilities:
Derivative liabilities		(736)
Recurring Basis [Member] | Discontinued Operations [Member]
Assets:
Derivative assets		103
Liabilities:
Derivative liabilities		(511)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring Basis [Member]
Assets:
Derivative assets	0	0
Total assets at fair value	0	0
Liabilities:
Derivative liabilities		0
Contingent consideration obligation		0
Total liabilities at fair value		0
Significant Other Observable Inputs (Level 2) [Member] | Recurring Basis [Member]
Assets:
Derivative assets	407	3,070
Total assets at fair value	407	3,070
Liabilities:
Derivative liabilities		(1,247)
Contingent consideration obligation		0
Total liabilities at fair value		(1,247)
Significant Unobservable Inputs (Level 3) [Member] | Recurring Basis [Member]
Assets:
Derivative assets	0	0
Total assets at fair value	$ 0	0
Liabilities:
Derivative liabilities		0
Contingent consideration obligation		(5,640)
Total liabilities at fair value		$ (5,640)

Fair Value (Schedule of Fair 75

Fair Value (Schedule of Fair Value, Real Estate Assets Measured on Non-Recurring Basis) (Details) - Real estate assets [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Re-Measured Balance	$ 52,557
Non-recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Losses	(33,211)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Re-Measured Balance	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Re-Measured Balance	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Re-Measured Balance	$ 52,557	$ 85,768

Fair Value (Schedule of Fair 76

Fair Value (Schedule of Fair Value, Quantitative Information of Unobservable Inputs of Level 3 Real Estate) (Details) - Real estate assets [Member] - Significant Unobservable Inputs (Level 3) [Member]	12 Months Ended
	Dec. 31, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Terminal capitalization rate (as a percent)	8.50%
Discount rate (as a percent)	8.70%
Market rental rate per square foot (in dollars per square foot)	37
Annual growth rate (as a percent)	2.00%
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Comparable sale price per square foot (in dollars per square foot)	180
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Comparable sale price per square foot (in dollars per square foot)	247

Fair Value (Schedule of Reconci

Fair Value (Schedule of Reconciliation of Fair Value of Recurring Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 5,640	$ 5,340	$ 6,570
Release of contingent consideration obligation related to property disposition	(2,720)	0	0
Total changes in fair value included in income from discontinued operations	(2,920)	300	(1,230)
Ending balance	0	5,640	5,340
Unrealized (gains) losses still held	$ 0	$ 0	$ 0

Derivative Instruments and He78

Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Gain on discontinuation of cash flow hedge due to forecasted transaction probable of not occuring	$ 4,637,000
Loss on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring		$ 728,000
Gain (loss) recognized due to ineffectiveness of hedges of interest rate risk			$ 0
Additional amount expected to be reclassified from AOCI into earnings during next twelve months	100,000
Fair value of derivatives in a net liability position	0
Interest Expense, Net [Member]
Derivative [Line Items]
Gain on discontinuation of cash flow hedge due to forecasted transaction probable of not occuring	3,755,000
Income from Discontinued Operations [Member]
Derivative [Line Items]
Gain on discontinuation of cash flow hedge due to forecasted transaction probable of not occuring	$ 882,000

Derivative Instruments and He79

Derivative Instruments and Hedging Activities (Schedule of the Notional Amount and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Fair Value of Asset	$ 407	$ 3,070
Fair Value of (Liability)	0	(1,247)
Continuing Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset		2,967
Fair Value of (Liability)		(736)
Discontinued Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset		103
Fair Value of (Liability)		(511)
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Outstanding Notional Amount		540,425
Fair Value of Asset		3,070
Fair Value of (Liability)		(1,247)
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Continuing Operations [Member]
Derivatives, Fair Value [Line Items]
Outstanding Notional Amount	121,066	312,021
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Discontinued Operations [Member]
Derivatives, Fair Value [Line Items]
Outstanding Notional Amount		228,404
Other Assets [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Continuing Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset	407	2,967
Accounts Payable and Other Liabilities [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair Value of (Liability)	$ 0
Accounts Payable and Other Liabilities [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Continuing Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of (Liability)		(736)
Assets of Discontinued Operations [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Discontinued Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset		103
Liabilities of Discontinued Operations [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Discontinued Operations [Member]
Derivatives, Fair Value [Line Items]
Fair Value of (Liability)		$ (511)
Minimum [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Effective Dates	Jul. 11, 2014
Maturity Dates	May 28, 2019
Maximum [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Effective Dates	Oct. 11, 2017
Maturity Dates	Oct. 11, 2022

Derivative Instruments and He80

Derivative Instruments and Hedging Activities (Schedule of Gains or Losses Recognized on Derivative Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ 2,062	$ (517)	$ (5,380)
Amount of Income (Loss) Reclassified From Accumulated Other Comprehensive Loss to Net Income (Effective Portion and Accelerated Amounts)	3,478	(4,920)	(4,335)
Interest Rate Swaps [Member] | Continuing Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in OCI on Derivatives (Effective Portion)	1,310	1,045	(2,905)
Interest Rate Swaps [Member] | Continuing Operations [Member] | Interest Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Reclassified From Accumulated Other Comprehensive Loss to Net Income (Effective Portion and Accelerated Amounts)	3,353	(2,764)	(2,408)
Interest Rate Swaps [Member] | Discontinued Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in OCI on Derivatives (Effective Portion)	752	(1,562)	(2,475)
Interest Rate Swaps [Member] | Discontinued Operations [Member] | Income from Discontinued Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Reclassified From Accumulated Other Comprehensive Loss to Net Income (Effective Portion and Accelerated Amounts)	$ 125	$ (2,156)	$ (1,927)

Derivative Instruments and He81

Derivative Instruments and Hedging Activities (Schedule of Offsetting of Derivative Positions) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets	$ 407	$ 3,070
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	407	3,070
Gross Amounts Not Offset in the Balance Sheet, Financial Instruments Collateral	0	(10)
Gross Amounts Not Offset in the Balance Sheet, Cash Collateral	0	0
Net Amount	407	3,060
Offsetting Derivative Liabilities [Abstract]
Gross Amounts of Recognized Liabilities	0	1,247
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts Of Liabilities Presented in the Balance Sheet	0	1,247
Gross Amounts Not Offset in the Balance Sheet, Financial Instruments Collateral	0	(10)
Gross Amounts Not Offset in the Balance Sheet, Cash Collateral	0	0
Net Amount	$ 0	1,237
Continuing Operations [Member]
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets		2,967
Net Amounts of Assets Presented in the Balance Sheet		2,967
Net Amount		2,957
Offsetting Derivative Liabilities [Abstract]
Gross Amounts of Recognized Liabilities		736
Net Amounts Of Liabilities Presented in the Balance Sheet		736
Net Amount		726
Discontinued Operations [Member]
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets		103
Net Amounts of Assets Presented in the Balance Sheet		103
Net Amount		103
Offsetting Derivative Liabilities [Abstract]
Gross Amounts of Recognized Liabilities		511
Net Amounts Of Liabilities Presented in the Balance Sheet		511
Net Amount		$ 511

Accumulated Other Comprehensi82

Accumulated Other Comprehensive Income (Loss) (Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 1,370,656
Other comprehensive (loss) income attributable to common stockholders	(1,416)	$ 4,403	$ (939)
Purchase of noncontrolling interests	(500)		(66,199)
Ending Balance	1,425,848	1,370,656
Unrealized Income (Loss) On Derivative Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	2,303	(2,100)	(1,161)
Other comprehensive income (loss) before reclassification	2,062	(517)	(5,042)
Amount of income (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast)	(3,478)	4,920	4,103
Other comprehensive (loss) income attributable to common stockholders	(1,416)	4,403	(939)
Purchase of noncontrolling interests			0
Ending Balance	887	2,303	(2,100)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	1,823	(2,580)	(1,161)
Other comprehensive income (loss) before reclassification	2,062	(517)	(5,042)
Amount of income (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion and missed forecast)	(3,478)	4,920	4,103
Other comprehensive (loss) income attributable to common stockholders	(1,416)	4,403	(939)
Purchase of noncontrolling interests			(480)
Ending Balance	$ 407	$ 1,823	$ (2,580)

Accumulated Other Comprehensi83

Accumulated Other Comprehensive Income (Loss) (Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ 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
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Interest expense, net									$ 19,109	$ 23,323	$ 15,969
Income from discontinued operations	$ (231,964)	$ (10,636)	$ (8,886)	$ (10,189)	$ (8,897)	$ (9,018)	$ (8,447)	$ (8,317)	(261,675)	(34,679)	(36,305)
Net income	$ (194,501)	$ (6,944)	$ (13,208)	$ (9,984)	$ (8,145)	$ 9,494	$ (17,914)	$ (18,592)	(224,637)	(35,157)	(68,376)
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Income (Loss) On Derivative Instruments [Member] | Interest Rate Swaps [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Net income									(3,478)	4,920	4,335
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Income (Loss) On Derivative Instruments [Member] | Interest Rate Swaps [Member] | Continuing Operations [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Interest expense, net									(3,353)	2,764	2,408
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Income (Loss) On Derivative Instruments [Member] | Interest Rate Swaps [Member] | Discontinued Operations [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Income from discontinued operations									$ (125)	$ 2,156	$ 1,927

Stock-based Compensation (Narra

Stock-based Compensation (Narrative) (Details) - 2010 Restricted Share Plan [Member] - Restricted Stock [Member] - USD ($)	Aug. 18, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized and reserved shares of common stock under plan		300,000
Award vesting period under plan		4 years
Number of shares awarded to independent board members upon re-election	9,000	9,000
Grant date fair value, per share (in dollars per share)		$ 10.02
Unrecognized compensation expense		$ 180,000	$ 179,000
Unrecognized compensation expense, weighted average period of recognition		2 years 11 days
Fair value of nonvested shares of restricted common stock		$ 208,350	225,000
Stock-based compensation expense		$ 88,000	$ 90,000	$ 90,000

Stock-based Compensation (Sched

Stock-based Compensation (Schedule of Nonvested Shares of Restricted Common Stock Activity) (Details) - 2010 Restricted Share Plan [Member] - Restricted Stock [Member] - shares	Aug. 18, 2017	Dec. 31, 2017
Summary of Restricted Common Stock Activity, Nonvested, Number of Shares [Roll Forward]
Nonvested, Beginning Balance (in shares)		22,500
Vested (in shares)		(9,000)
Granted (in shares)	9,000	9,000
Nonvested, Ending Balance (in shares)		22,500

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal excise tax expense		$ 641,000
Impact related to uncertain tax positions from the results of operations		$ 0	$ 0	$ 0
Interest expense or penalties related to unrecognized tax benefits	$ 0

Income Taxes (Schedule of Chara

Income Taxes (Schedule of Characterization of Distributions Paid to Stockholders) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Ordinary dividends (as a percent)	0.00%	45.45%	46.69%
Capital gain distributions (as a percent)	100.00%	3.20%	0.00%
Nontaxable distributions (as a percent)	0.00%	51.35%	53.31%
Total (as a percent)	100.00%	100.00%	100.00%

Commitments and Contingencies (

Commitments and Contingencies (Details)	Dec. 31, 2017case
Commitments and Contingencies Disclosure [Abstract]
Number of material pending legal proceedings to which the Company is a party	0

Selected Quarterly Financial 89

Selected Quarterly Financial Data (Unaudited) (Schedule of 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
Selected Quarterly Financial Information [Abstract]
Total revenue	$ 22,984	$ 23,857	$ 25,877	$ 21,696	$ 18,901	$ 13,573	$ 29,915	$ 27,848	$ 94,414	$ 90,237	$ 96,818
Total expenses	(19,237)	(15,263)	(15,058)	(14,849)	(16,543)	(29,102)	(16,199)	(13,593)	(64,407)	(75,437)	(57,447)
Income from operations	3,747	8,594	10,819	6,847	2,358	(15,529)	13,716	14,255	30,007	14,800	39,371
Other expense	(41,210)	(12,286)	(6,497)	(7,052)	(3,110)	(2,983)	(4,249)	(3,980)	(67,045)	(14,322)	(7,300)
(Loss) income from continuing operations	(37,463)	(3,692)	4,322	(205)	(752)	(18,512)	9,467	10,275	(37,038)	478	32,071
Income from discontinued operations	231,964	10,636	8,886	10,189	8,897	9,018	8,447	8,317	261,675	34,679	36,305
Net income	194,501	6,944	13,208	9,984	8,145	(9,494)	17,914	18,592	224,637	35,157	68,376
Less: Net income attributable to noncontrolling interests in consolidated partnerships	(44,308)	(898)	(1,039)	(1,081)	(926)	(1,006)	(1,061)	(928)	(47,326)	(3,921)	(4,938)
Net income attributable to common stockholders	$ 150,193	$ 6,046	$ 12,169	$ 8,903	$ 7,219	$ (10,500)	$ 16,853	$ 17,664	$ 177,311	$ 31,236	$ 63,438
Basic:
Continuing operations (in dollars per share)	$ (0.21)	$ (0.02)	$ 0.03	$ 0	$ 0	$ (0.10)	$ 0.05	$ 0.06	$ (0.20)	$ 0	$ 0.17
Discontinued operations (in dollars per share)	1.01	0.05	0.04	0.05	0.04	0.04	0.04	0.04	1.15	0.17	0.19
Net income attributable to common stockholders (in dollars per share)	0.80	0.03	0.07	0.05	0.04	(0.06)	0.09	0.10	0.95	0.17	0.36
Diluted:
Continuing operations (in dollars per share)	(0.21)	(0.02)	0.03	0	0	(0.10)	0.05	0.06	(0.20)	0	0.17
Discontinued operations (in dollars per share)	1.01	0.05	0.04	0.05	0.04	0.04	0.04	0.04	1.15	0.17	0.19
Net income attributable to common stockholders (in dollars per share)	$ 0.80	$ 0.03	$ 0.07	$ 0.05	$ 0.04	$ (0.06)	$ 0.09	$ 0.10	$ 0.95	$ 0.17	$ 0.36
Weighted average number of common shares outstanding:
Basic (in shares)	186,182,196	186,295,970	185,897,525	185,300,384	184,628,066	183,726,479	182,743,182	181,975,405	185,922,468	183,279,872	178,521,807
Diluted (in shares)	186,182,196	186,295,970	185,911,968	185,300,384	184,628,066	183,726,479	182,762,094	181,992,093	185,922,468	183,297,662	178,539,609

Subsequent Events (Details)

Subsequent Events (Details)

Mar. 16, 2018USD ($)

Mar. 01, 2018USD ($)

Feb. 01, 2018USD ($)

Jan. 22, 2018$ / shares

Jan. 10, 2018USD ($)property

Jan. 02, 2018USD ($)

Dec. 31, 2017USD ($)

Jan. 30, 2017

Dec. 31, 2017USD ($)

Dec. 31, 2017USD ($)property$ / shares

Dec. 31, 2016USD ($)$ / shares

Dec. 31, 2015USD ($)$ / shares

Subsequent Event [Line Items]

Aggregate distributions paid

$ 509,989,000

Distributions paid in cash

241,512,000

$ 63,082,000

$ 60,038,000

$ 56,775,000

Common stock issued through distribution reinvestment plan

268,477,000

$ 66,993,000

$ 68,086,000

$ 67,821,000

Distributions declared per common share (in dollars per share) | $ / shares

$ 0.70

$ 0.70

$ 0.70

Number of properties disposed | property

16

Sale price of properties disposed

1,153,000,000

$ 1,153,000,000

$ 1,153,000,000

Proceeds from real estate disposals

1,131,582,000

$ 0

$ 0

Credit facility, maximum commitments available

353,606,000

353,606,000

353,606,000

Revolving Line of Credit [Member]

Subsequent Event [Line Items]

Credit facility, maximum commitments available

$ 400,000,000

$ 400,000,000

$ 400,000,000

Credit facility, maturity date

May 28, 2017

May 28, 2018

Credit facility, available extension period

12 months

12 months

Subsequent Event [Member] | Arizona Data Center Portfolio [Member]

Subsequent Event [Line Items]

Number of properties disposed | property

2

Sale price of properties disposed

$ 142,500,000

Proceeds from real estate disposals

$ 140,221,000

Subsequent Event [Member] | Revolving Line of Credit [Member]

Subsequent Event [Line Items]

Credit facility, maximum commitments available

$ 400,000,000

Credit facility, maturity date

May 28, 2019

Credit facility, available extension period

12 months

Credit facility, maximum commitments available after available increase

$ 750,000,000

Subsequent Event [Member] | December 1, 2017 To December 31, 2017 [Member]

Subsequent Event [Line Items]

Aggregate distributions paid

$ 11,076,000

Distributions paid in cash

5,468,000

Common stock issued through distribution reinvestment plan

$ 5,608,000

Subsequent Event [Member] | February 15, 2018 [Member]

Subsequent Event [Line Items]

Distributions paid in cash

$ 556,227,000

Distributions declared per common share (in dollars per share) | $ / shares

$ 3

Subsequent Event [Member] | January 1, 2018 To January 31, 2018 [Member]

Subsequent Event [Line Items]

Aggregate distributions paid

11,088,000

Distributions paid in cash

5,541,000

Common stock issued through distribution reinvestment plan

$ 5,547,000

Subsequent Event [Member] | February 1, 2018 To February 28, 2018 [Member]

Subsequent Event [Line Items]

Aggregate distributions paid

$ 9,994,000

Distributions paid in cash

5,093,000

Common stock issued through distribution reinvestment plan

$ 4,901,000

Subsequent Event [Member] | March 1, 2018 To May 31, 2018 [Member]

Subsequent Event [Line Items]

Distributions declared per common share (in dollars per share) | $ / shares

$ 0.001150685

Number of days, distribution calculation

365 days

Annualized distribution rate

6.70%

Share price (in dollars per share) | $ / shares

$ 6.26

Schedule III - Real Estate As91

Schedule III - Real Estate Assets and Accumulated Depreciation (Schedule of Real Estate Assets 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 [Line Items]
Encumbrances		$ 141,477
Initial Cost, Land		97,865
Initial Cost, Buildings and Improvements		1,044,580
Cost Capitalized Subsequent to Acquisition	[1]	57,787
Gross Amount Carried at Close of Period, Land	[2]	95,479
Gross Amount Carried at Close of Period, Buildings and Improvements	[2]	1,104,753
Gross Amount Carried at Close of Period, Total		1,200,232	[2]	$ 2,163,358	$ 2,036,330	$ 1,845,136
Accumulated Depreciation		101,777	[3]	$ 152,486	$ 100,142	$ 52,785
St. Louis Surgical Center [Member] | Creve Coeur, MO [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	0
Initial Cost, Land		808
Initial Cost, Buildings and Improvements		8,206
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		808
Gross Amount Carried at Close of Period, Buildings and Improvements		8,206
Gross Amount Carried at Close of Period, Total		9,014
Accumulated Depreciation		$ 1,663
Year Constructed		2,005
Date Acquired		Feb. 9, 2012
Stonegate Medical Center [Member] | Austin, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,904
Initial Cost, Buildings and Improvements		5,764
Cost Capitalized Subsequent to Acquisition		90
Gross Amount Carried at Close of Period, Land		1,904
Gross Amount Carried at Close of Period, Buildings and Improvements		5,854
Gross Amount Carried at Close of Period, Total		7,758
Accumulated Depreciation		$ 1,201
Year Constructed		2,008
Date Acquired		Mar. 30, 2012
HPI Integrated Medical Facility [Member] | Oklahoma City, OK [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		789
Initial Cost, Buildings and Improvements		7,815
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		789
Gross Amount Carried at Close of Period, Buildings and Improvements		7,815
Gross Amount Carried at Close of Period, Total		8,604
Accumulated Depreciation		$ 1,288
Year Constructed		2,007
Date Acquired		Jun. 28, 2012
Baylor Medical Center [Member] | Dallas, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 18,316
Initial Cost, Land		4,012
Initial Cost, Buildings and Improvements		23,557
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		4,012
Gross Amount Carried at Close of Period, Buildings and Improvements		23,557
Gross Amount Carried at Close of Period, Total		27,569
Accumulated Depreciation		$ 3,204
Year Constructed		2,010
Date Acquired		Aug. 29, 2012
Vibra Denver Hospital [Member] | Denver, CO [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,798
Initial Cost, Buildings and Improvements		15,012
Cost Capitalized Subsequent to Acquisition		5,872
Gross Amount Carried at Close of Period, Land		1,798
Gross Amount Carried at Close of Period, Buildings and Improvements		20,884
Gross Amount Carried at Close of Period, Total		22,682
Accumulated Depreciation		$ 2,256
Year Constructed	[5]	1,962
Date Acquired		Sep. 28, 2012
Vibra New Bedford Hospital [Member] | New Bedford, MA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,992
Initial Cost, Buildings and Improvements		21,823
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,992
Gross Amount Carried at Close of Period, Buildings and Improvements		21,823
Gross Amount Carried at Close of Period, Total		23,815
Accumulated Depreciation		$ 2,938
Year Constructed		1,942
Date Acquired		Oct. 22, 2012
Houston Surgery Center [Member] | Houston, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		503
Initial Cost, Buildings and Improvements		4,115
Cost Capitalized Subsequent to Acquisition		510
Gross Amount Carried at Close of Period, Land		503
Gross Amount Carried at Close of Period, Buildings and Improvements		4,625
Gross Amount Carried at Close of Period, Total		5,128
Accumulated Depreciation		$ 622
Year Constructed	[6]	1,998
Date Acquired		Nov. 28, 2012
Akron General Medical Center [Member] | Green, OH [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		2,936
Initial Cost, Buildings and Improvements		36,142
Cost Capitalized Subsequent to Acquisition		(199)
Gross Amount Carried at Close of Period, Land		2,936
Gross Amount Carried at Close of Period, Buildings and Improvements		35,943
Gross Amount Carried at Close of Period, Total		38,879
Accumulated Depreciation		$ 4,792
Year Constructed		2,012
Date Acquired		Dec. 28, 2012
Grapevine Hospital [Member] | Grapevine, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 12,371
Initial Cost, Land		962
Initial Cost, Buildings and Improvements		20,277
Cost Capitalized Subsequent to Acquisition		105
Gross Amount Carried at Close of Period, Land		962
Gross Amount Carried at Close of Period, Buildings and Improvements		20,382
Gross Amount Carried at Close of Period, Total		21,344
Accumulated Depreciation		$ 2,590
Year Constructed		2,007
Date Acquired		Feb. 25, 2013
Andover Data Center [Member] | Andover, MA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4],[7]	$ 0
Initial Cost, Land	[7]	2,279
Initial Cost, Buildings and Improvements	[7]	9,391
Cost Capitalized Subsequent to Acquisition	[7]	0
Gross Amount Carried at Close of Period, Land	[7]	2,279
Gross Amount Carried at Close of Period, Buildings and Improvements	[7]	9,391
Gross Amount Carried at Close of Period, Total	[7]	11,670
Accumulated Depreciation	[7]	$ 1,487
Year Constructed	[7],[8]	1,984
Date Acquired	[7]	Mar. 28, 2013
Wilkes-Barre Healthcare Facility [Member] | Mountain Top, PA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		335
Initial Cost, Buildings and Improvements		3,812
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		335
Gross Amount Carried at Close of Period, Buildings and Improvements		3,812
Gross Amount Carried at Close of Period, Total		4,147
Accumulated Depreciation		$ 553
Year Constructed		2,012
Date Acquired		May 31, 2013
Fresenius Healthcare Facility [Member] | Goshen, IN [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		304
Initial Cost, Buildings and Improvements		3,965
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		304
Gross Amount Carried at Close of Period, Buildings and Improvements		3,965
Gross Amount Carried at Close of Period, Total		4,269
Accumulated Depreciation		$ 462
Year Constructed		2,010
Date Acquired		Jun. 11, 2013
Physicians' Specialty Hospital [Member] | Fayetteville, AR [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		322
Initial Cost, Buildings and Improvements		19,974
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		322
Gross Amount Carried at Close of Period, Buildings and Improvements		19,974
Gross Amount Carried at Close of Period, Total		20,296
Accumulated Depreciation		$ 2,296
Year Constructed	[9]	1,994
Date Acquired		Jun. 28, 2013
Christus Cabrini Surgery Center [Member] | Alexandria, LA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		0
Initial Cost, Buildings and Improvements		4,235
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		0
Gross Amount Carried at Close of Period, Buildings and Improvements		4,235
Gross Amount Carried at Close of Period, Total		4,235
Accumulated Depreciation		$ 484
Year Constructed		2,007
Date Acquired		Jul. 31, 2013
Valley Baptist Wellness Center [Member] | Harlingen, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 5,842
Initial Cost, Land		0
Initial Cost, Buildings and Improvements		8,386
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		0
Gross Amount Carried at Close of Period, Buildings and Improvements		8,386
Gross Amount Carried at Close of Period, Total		8,386
Accumulated Depreciation		$ 955
Year Constructed		2,007
Date Acquired		Aug. 16, 2013
Akron General Integrated Medical Facility [Member] | Green, OH [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		904
Initial Cost, Buildings and Improvements		7,933
Cost Capitalized Subsequent to Acquisition		1
Gross Amount Carried at Close of Period, Land		904
Gross Amount Carried at Close of Period, Buildings and Improvements		7,934
Gross Amount Carried at Close of Period, Total		8,838
Accumulated Depreciation		$ 1,009
Year Constructed		2,013
Date Acquired		Aug. 23, 2013
Cumberland Surgical Hospital [Member] | San Antonio, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[10]	$ 0
Initial Cost, Land	[10]	3,440
Initial Cost, Buildings and Improvements	[10]	25,923
Cost Capitalized Subsequent to Acquisition	[10]	4,164
Gross Amount Carried at Close of Period, Land	[10]	3,440
Gross Amount Carried at Close of Period, Buildings and Improvements	[10]	30,087
Gross Amount Carried at Close of Period, Total	[10]	33,527
Accumulated Depreciation	[10]	$ 3,648
Year Constructed	[10]	2,013
Date Acquired	[10]	Aug. 29, 2013
Post Acute/Warm Springs Rehab Hospital of Westover Hills [Member] | San Antonio, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,740
Initial Cost, Buildings and Improvements		18,280
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,740
Gross Amount Carried at Close of Period, Buildings and Improvements		18,280
Gross Amount Carried at Close of Period, Total		20,020
Accumulated Depreciation		$ 1,989
Year Constructed		2,012
Date Acquired		Sep. 6, 2013
Warm Springs Rehabilitation Hospital [Member] | San Antonio, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		0
Initial Cost, Buildings and Improvements		23,462
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		0
Gross Amount Carried at Close of Period, Buildings and Improvements		23,462
Gross Amount Carried at Close of Period, Total		23,462
Accumulated Depreciation		$ 2,435
Year Constructed		1,987
Date Acquired		Nov. 27, 2013
Lubbock Heart Hospital [Member] | Lubbock, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 18,615
Initial Cost, Land		3,749
Initial Cost, Buildings and Improvements		32,174
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		3,749
Gross Amount Carried at Close of Period, Buildings and Improvements		32,174
Gross Amount Carried at Close of Period, Total		35,923
Accumulated Depreciation		$ 3,281
Year Constructed		2,003
Date Acquired		Dec. 20, 2013
Walnut Hill Medical Center [Member] | Dallas, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		3,337
Initial Cost, Buildings and Improvements		79,116
Cost Capitalized Subsequent to Acquisition		(26,769)
Gross Amount Carried at Close of Period, Land		2,143
Gross Amount Carried at Close of Period, Buildings and Improvements		53,541
Gross Amount Carried at Close of Period, Total		55,684
Accumulated Depreciation		$ 7,673
Year Constructed	[11]	1,983
Date Acquired		Feb. 25, 2014
Cypress Pointe Surgical Hospital [Member] | Hammond, LA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,379
Initial Cost, Buildings and Improvements		20,549
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,379
Gross Amount Carried at Close of Period, Buildings and Improvements		20,549
Gross Amount Carried at Close of Period, Total		21,928
Accumulated Depreciation		$ 2,038
Year Constructed		2,006
Date Acquired		Mar. 14, 2014
Milwaukee Data Center [Member] | Hartland, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4],[7]	$ 0
Initial Cost, Land	[7]	1,240
Initial Cost, Buildings and Improvements	[7]	16,872
Cost Capitalized Subsequent to Acquisition	[7]	0
Gross Amount Carried at Close of Period, Land	[7]	1,240
Gross Amount Carried at Close of Period, Buildings and Improvements	[7]	16,872
Gross Amount Carried at Close of Period, Total	[7]	18,112
Accumulated Depreciation	[7]	$ 1,628
Year Constructed	[7]	2,004
Date Acquired	[7]	Mar. 28, 2014
Bay Area Regional Medical Center [Member] | Webster, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 86,333
Initial Cost, Land		6,937
Initial Cost, Buildings and Improvements		168,710
Cost Capitalized Subsequent to Acquisition		63,823
Gross Amount Carried at Close of Period, Land		6,937
Gross Amount Carried at Close of Period, Buildings and Improvements		232,533
Gross Amount Carried at Close of Period, Total		239,470
Accumulated Depreciation		$ 15,237
Year Constructed		2,014
Date Acquired		Jul. 11, 2014
Phoenix Data Center [Member] | Phoenix, AZ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4],[7],[12]	$ 0
Initial Cost, Land	[7],[12]	11,576
Initial Cost, Buildings and Improvements	[7],[12]	78,188
Cost Capitalized Subsequent to Acquisition	[7],[12]	0
Gross Amount Carried at Close of Period, Land	[7],[12]	11,576
Gross Amount Carried at Close of Period, Buildings and Improvements	[7],[12]	78,188
Gross Amount Carried at Close of Period, Total	[7],[12]	89,764
Accumulated Depreciation	[7],[12]	$ 6,373
Year Constructed	[7],[12]	2,005
Date Acquired	[7],[12]	Aug. 27, 2014
Scottsdale Data Center [Member] | Scottsdale, AZ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4],[7],[12]	$ 0
Initial Cost, Land	[7],[12]	3,515
Initial Cost, Buildings and Improvements	[7],[12]	24,907
Cost Capitalized Subsequent to Acquisition	[7],[12]	0
Gross Amount Carried at Close of Period, Land	[7],[12]	3,515
Gross Amount Carried at Close of Period, Buildings and Improvements	[7],[12]	24,907
Gross Amount Carried at Close of Period, Total	[7],[12]	28,422
Accumulated Depreciation	[7],[12]	$ 2,026
Year Constructed	[7],[12]	2,000
Date Acquired	[7],[12]	Aug. 27, 2014
Rhode Island Rehabilitation Healthcare Facility [Member] | North Smithfield, RI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		818
Initial Cost, Buildings and Improvements		11,597
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		818
Gross Amount Carried at Close of Period, Buildings and Improvements		11,597
Gross Amount Carried at Close of Period, Total		12,415
Accumulated Depreciation		$ 1,097
Year Constructed	[13]	1,965
Date Acquired		Aug. 28, 2014
Select Medical - Akron [Member] | Akron, OH [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		2,207
Initial Cost, Buildings and Improvements		23,430
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		2,207
Gross Amount Carried at Close of Period, Buildings and Improvements		23,430
Gross Amount Carried at Close of Period, Total		25,637
Accumulated Depreciation		$ 2,003
Year Constructed		2,008
Date Acquired		Aug. 29, 2014
Select Medical - Frisco [Member] | Frisco, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		0
Initial Cost, Buildings and Improvements		20,679
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		0
Gross Amount Carried at Close of Period, Buildings and Improvements		20,679
Gross Amount Carried at Close of Period, Total		20,679
Accumulated Depreciation		$ 1,852
Year Constructed		2,010
Date Acquired		Aug. 29, 2014
Select Medical - Bridgeton [Member] | Bridgeton, MO [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		0
Initial Cost, Buildings and Improvements		31,204
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		0
Gross Amount Carried at Close of Period, Buildings and Improvements		31,204
Gross Amount Carried at Close of Period, Total		31,204
Accumulated Depreciation		$ 2,689
Year Constructed		2,012
Date Acquired		Aug. 29, 2014
San Antonio Healthcare Facility [Member] | San Antonio, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[14]	$ 0
Initial Cost, Land	[14]	3,200
Initial Cost, Buildings and Improvements	[14]	0
Cost Capitalized Subsequent to Acquisition	[14]	16,366
Gross Amount Carried at Close of Period, Land	[14]	3,200
Gross Amount Carried at Close of Period, Buildings and Improvements	[14]	16,366
Gross Amount Carried at Close of Period, Total	[14]	19,566
Accumulated Depreciation	[14]	$ 391
Year Constructed	[14]	2,017
Date Acquired	[14]	Sep. 12, 2014
Dermatology Assoc-Randolph Ct [Member] | Mantiowoc, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		390
Initial Cost, Buildings and Improvements		2,202
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		390
Gross Amount Carried at Close of Period, Buildings and Improvements		2,202
Gross Amount Carried at Close of Period, Total		2,592
Accumulated Depreciation		$ 214
Year Constructed		2,003
Date Acquired		Sep. 15, 2014
Dermatology Assoc-Murray St [Member] | Marinette, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		253
Initial Cost, Buildings and Improvements		1,134
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		253
Gross Amount Carried at Close of Period, Buildings and Improvements		1,134
Gross Amount Carried at Close of Period, Total		1,387
Accumulated Depreciation		$ 116
Year Constructed		2,008
Date Acquired		Sep. 15, 2014
Dermatology Assoc-N Lightning Dr [Member] | Appleton, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		463
Initial Cost, Buildings and Improvements		2,049
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		463
Gross Amount Carried at Close of Period, Buildings and Improvements		2,049
Gross Amount Carried at Close of Period, Total		2,512
Accumulated Depreciation		$ 212
Year Constructed		2,011
Date Acquired		Sep. 15, 2014
Dermatology Assoc-Development Dr [Member] | Bellevue, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		491
Initial Cost, Buildings and Improvements		1,450
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		491
Gross Amount Carried at Close of Period, Buildings and Improvements		1,450
Gross Amount Carried at Close of Period, Total		1,941
Accumulated Depreciation		$ 150
Year Constructed		2,010
Date Acquired		Sep. 15, 2014
Dermatology Assoc-York St [Member] | Mantiowoc, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		305
Initial Cost, Buildings and Improvements		11,299
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		305
Gross Amount Carried at Close of Period, Buildings and Improvements		11,299
Gross Amount Carried at Close of Period, Total		11,604
Accumulated Depreciation		$ 996
Year Constructed	[15]	1,964
Date Acquired		Sep. 15, 2014
Dermatology Assoc-Scheuring Rd [Member] | De Pere, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		703
Initial Cost, Buildings and Improvements		1,851
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		703
Gross Amount Carried at Close of Period, Buildings and Improvements		1,851
Gross Amount Carried at Close of Period, Total		2,554
Accumulated Depreciation		$ 187
Year Constructed		2,005
Date Acquired		Sep. 15, 2014
Dermatology Assoc-Riverview Dr [Member] | Howard, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		552
Initial Cost, Buildings and Improvements		1,960
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		552
Gross Amount Carried at Close of Period, Buildings and Improvements		1,960
Gross Amount Carried at Close of Period, Total		2,512
Accumulated Depreciation		$ 202
Year Constructed		2,011
Date Acquired		Sep. 15, 2014
Dermatology Assoc-State Rd 44 [Member] | Oshkosh, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		384
Initial Cost, Buildings and Improvements		2,514
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		384
Gross Amount Carried at Close of Period, Buildings and Improvements		2,514
Gross Amount Carried at Close of Period, Total		2,898
Accumulated Depreciation		$ 254
Year Constructed		2,010
Date Acquired		Sep. 15, 2014
Dermatology Assoc-Green Bay Rd [Member] | Sturgeon Bay, WI [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		364
Initial Cost, Buildings and Improvements		657
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		364
Gross Amount Carried at Close of Period, Buildings and Improvements		657
Gross Amount Carried at Close of Period, Total		1,021
Accumulated Depreciation		$ 75
Year Constructed		2,007
Date Acquired		Sep. 15, 2014
Lafayette Surgical Hospital [Member] | Lafayette, LA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		3,909
Initial Cost, Buildings and Improvements		33,212
Cost Capitalized Subsequent to Acquisition		262
Gross Amount Carried at Close of Period, Land		3,909
Gross Amount Carried at Close of Period, Buildings and Improvements		33,474
Gross Amount Carried at Close of Period, Total		37,383
Accumulated Depreciation		$ 2,829
Year Constructed		2,004
Date Acquired		Sep. 19, 2014
Alpharetta Data Center II [Member] | Alpharetta, GA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4],[7]	$ 0
Initial Cost, Land	[7]	3,100
Initial Cost, Buildings and Improvements	[7]	54,880
Cost Capitalized Subsequent to Acquisition	[7]	4
Gross Amount Carried at Close of Period, Land	[7]	3,100
Gross Amount Carried at Close of Period, Buildings and Improvements	[7]	54,884
Gross Amount Carried at Close of Period, Total	[7]	57,984
Accumulated Depreciation	[7]	$ 4,171
Year Constructed	[7]	1,999
Date Acquired	[7]	Oct. 31, 2014
Landmark Hospital of Savannah [Member] | Savannah, GA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,980
Initial Cost, Buildings and Improvements		15,418
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,980
Gross Amount Carried at Close of Period, Buildings and Improvements		15,418
Gross Amount Carried at Close of Period, Total		17,398
Accumulated Depreciation		$ 1,165
Year Constructed		2,014
Date Acquired		Jan. 15, 2015
21st Century Oncology-Yucca Valley [Member] | Yucca Valley, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		663
Initial Cost, Buildings and Improvements		4,004
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		663
Gross Amount Carried at Close of Period, Buildings and Improvements		4,004
Gross Amount Carried at Close of Period, Total		4,667
Accumulated Depreciation		$ 327
Year Constructed		2,009
Date Acquired		Mar. 31, 2015
21st Century Oncology-Rancho Mirage [Member] | Rancho Mirage, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		156
Initial Cost, Buildings and Improvements		5,934
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		156
Gross Amount Carried at Close of Period, Buildings and Improvements		5,934
Gross Amount Carried at Close of Period, Total		6,090
Accumulated Depreciation		$ 478
Year Constructed		2,008
Date Acquired		Mar. 31, 2015
21st Century Oncology-Palm Desert [Member] | Palm Desert, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		364
Initial Cost, Buildings and Improvements		5,340
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		364
Gross Amount Carried at Close of Period, Buildings and Improvements		5,340
Gross Amount Carried at Close of Period, Total		5,704
Accumulated Depreciation		$ 403
Year Constructed		2,005
Date Acquired		Mar. 31, 2015
21st Century Oncology-Santa Rosa Beach [Member] | Santa Rosa Beach, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		646
Initial Cost, Buildings and Improvements		3,211
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		646
Gross Amount Carried at Close of Period, Buildings and Improvements		3,211
Gross Amount Carried at Close of Period, Total		3,857
Accumulated Depreciation		$ 234
Year Constructed		2,003
Date Acquired		Mar. 31, 2015
21st Century Oncology-Crestview [Member] | Crestview, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		205
Initial Cost, Buildings and Improvements		2,503
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		205
Gross Amount Carried at Close of Period, Buildings and Improvements		2,503
Gross Amount Carried at Close of Period, Total		2,708
Accumulated Depreciation		$ 198
Year Constructed		2,004
Date Acquired		Mar. 31, 2015
21st Century Oncology-Fort Walton [Member] | Fort Walton Beach, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		747
Initial Cost, Buildings and Improvements		3,012
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		747
Gross Amount Carried at Close of Period, Buildings and Improvements		3,012
Gross Amount Carried at Close of Period, Total		3,759
Accumulated Depreciation		$ 234
Year Constructed		2,005
Date Acquired		Mar. 31, 2015
21st Century Oncology-Bradenton [Member] | Bradenton, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		835
Initial Cost, Buildings and Improvements		2,699
Cost Capitalized Subsequent to Acquisition		(1,560)
Gross Amount Carried at Close of Period, Land		443
Gross Amount Carried at Close of Period, Buildings and Improvements		1,531
Gross Amount Carried at Close of Period, Total		1,974
Accumulated Depreciation		$ 206
Year Constructed		2,002
Date Acquired		Mar. 31, 2015
21st Century Oncology-Tamarac [Member] | Tamarac, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		692
Initial Cost, Buildings and Improvements		1,496
Cost Capitalized Subsequent to Acquisition		(844)
Gross Amount Carried at Close of Period, Land		409
Gross Amount Carried at Close of Period, Buildings and Improvements		935
Gross Amount Carried at Close of Period, Total		1,344
Accumulated Depreciation		$ 124
Year Constructed		1,997
Date Acquired		Mar. 31, 2015
21st Century Oncology-Fort Myers I [Member] | Fort Myers, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		2,301
Initial Cost, Buildings and Improvements		1,180
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		2,301
Gross Amount Carried at Close of Period, Buildings and Improvements		1,180
Gross Amount Carried at Close of Period, Total		3,481
Accumulated Depreciation		$ 152
Year Constructed		1,999
Date Acquired		Mar. 31, 2015
21st Century Oncology-Fort Myers II [Member] | Fort Myers, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		4,522
Initial Cost, Buildings and Improvements		13,106
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		4,522
Gross Amount Carried at Close of Period, Buildings and Improvements		13,106
Gross Amount Carried at Close of Period, Total		17,628
Accumulated Depreciation		$ 1,021
Year Constructed		2,010
Date Acquired		Mar. 31, 2015
21st Century Oncology-Bonita Springs [Member] | Bonita Springs, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		1,146
Initial Cost, Buildings and Improvements		3,978
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,146
Gross Amount Carried at Close of Period, Buildings and Improvements		3,978
Gross Amount Carried at Close of Period, Total		5,124
Accumulated Depreciation		$ 288
Year Constructed		2,002
Date Acquired		Mar. 31, 2015
21st Century Oncology-Lehigh Acres [Member] | Lehigh Acres, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		433
Initial Cost, Buildings and Improvements		2,508
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		433
Gross Amount Carried at Close of Period, Buildings and Improvements		2,508
Gross Amount Carried at Close of Period, Total		2,941
Accumulated Depreciation		$ 186
Year Constructed		2,002
Date Acquired		Mar. 31, 2015
21st Century Oncology-East Naples [Member] | Naples, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		717
Initial Cost, Buildings and Improvements		5,278
Cost Capitalized Subsequent to Acquisition		(4,038)
Gross Amount Carried at Close of Period, Land		200
Gross Amount Carried at Close of Period, Buildings and Improvements		1,757
Gross Amount Carried at Close of Period, Total		1,957
Accumulated Depreciation		$ 399
Year Constructed		2,007
Date Acquired		Mar. 31, 2015
21st Century Oncology-Jacksonville [Member] | Jacksonville, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		802
Initial Cost, Buildings and Improvements		5,879
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		802
Gross Amount Carried at Close of Period, Buildings and Improvements		5,879
Gross Amount Carried at Close of Period, Total		6,681
Accumulated Depreciation		$ 516
Year Constructed		2,009
Date Acquired		Mar. 31, 2015
21st Century Oncology-Frankfort [Member] | Frankfort, KY [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		291
Initial Cost, Buildings and Improvements		817
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		291
Gross Amount Carried at Close of Period, Buildings and Improvements		817
Gross Amount Carried at Close of Period, Total		1,108
Accumulated Depreciation		$ 69
Year Constructed		1,993
Date Acquired		Mar. 31, 2015
21st Century Oncology-Las Vegas [Member] | Las Vegas, NV [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		251
Initial Cost, Buildings and Improvements		4,927
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		251
Gross Amount Carried at Close of Period, Buildings and Improvements		4,927
Gross Amount Carried at Close of Period, Total		5,178
Accumulated Depreciation		$ 371
Year Constructed		2,007
Date Acquired		Mar. 31, 2015
21st Century Oncology-Henderson [Member] | Henderson, NV [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		617
Initial Cost, Buildings and Improvements		2,324
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		617
Gross Amount Carried at Close of Period, Buildings and Improvements		2,324
Gross Amount Carried at Close of Period, Total		2,941
Accumulated Depreciation		$ 187
Year Constructed		2,000
Date Acquired		Mar. 31, 2015
21st Century Oncology-Fairlea [Member] | Fairlea, WV [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		125
Initial Cost, Buildings and Improvements		1,717
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		125
Gross Amount Carried at Close of Period, Buildings and Improvements		1,717
Gross Amount Carried at Close of Period, Total		1,842
Accumulated Depreciation		$ 131
Year Constructed		1,999
Date Acquired		Mar. 31, 2015
21st Century Oncology-El Segundo [Member] | El Segundo, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		1,138
Initial Cost, Buildings and Improvements		8,743
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,138
Gross Amount Carried at Close of Period, Buildings and Improvements		8,743
Gross Amount Carried at Close of Period, Total		9,881
Accumulated Depreciation		$ 622
Year Constructed		2,009
Date Acquired		Apr. 20, 2015
21st Century Oncology-Lakewood Ranch [Member] | Bradenton, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 0
Initial Cost, Land		553
Initial Cost, Buildings and Improvements		8,516
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		553
Gross Amount Carried at Close of Period, Buildings and Improvements		8,516
Gross Amount Carried at Close of Period, Total		9,069
Accumulated Depreciation		$ 636
Year Constructed		2,008
Date Acquired		Apr. 20, 2015
Post Acute Medical - Victoria I [Member] | Victoria, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		331
Initial Cost, Buildings and Improvements		10,278
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		331
Gross Amount Carried at Close of Period, Buildings and Improvements		10,278
Gross Amount Carried at Close of Period, Total		10,609
Accumulated Depreciation		$ 442
Year Constructed		2,013
Date Acquired		May 23, 2016
Post Acute Medical - Victoria II [Member] | Victoria, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		450
Initial Cost, Buildings and Improvements		10,393
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		450
Gross Amount Carried at Close of Period, Buildings and Improvements		10,393
Gross Amount Carried at Close of Period, Total		10,843
Accumulated Depreciation		$ 440
Year Constructed		1,998
Date Acquired		May 23, 2016
Post Acute Medical - New Braunfels [Member] | New Braunfels, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,619
Initial Cost, Buildings and Improvements		9,295
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,619
Gross Amount Carried at Close of Period, Buildings and Improvements		9,295
Gross Amount Carried at Close of Period, Total		10,914
Accumulated Depreciation		$ 394
Year Constructed		2,007
Date Acquired		May 23, 2016
Post Acute Medical - Covington [Member] | Covington, LA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		1,529
Initial Cost, Buildings and Improvements		13,503
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		1,529
Gross Amount Carried at Close of Period, Buildings and Improvements		13,503
Gross Amount Carried at Close of Period, Total		15,032
Accumulated Depreciation		$ 563
Year Constructed		1,984
Date Acquired		May 23, 2016
Post Acute Medical - Hammond [Member] | Hammond, LA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	[4]	$ 0
Initial Cost, Land		852
Initial Cost, Buildings and Improvements		9,815
Cost Capitalized Subsequent to Acquisition		0
Gross Amount Carried at Close of Period, Land		852
Gross Amount Carried at Close of Period, Buildings and Improvements		9,815
Gross Amount Carried at Close of Period, Total		10,667
Accumulated Depreciation		$ 425
Year Constructed		2,004
Date Acquired		May 23, 2016
[1]	The cost capitalized subsequent to acquisition is shown net of asset write-offs.
[2]	The aggregated cost for federal income tax purposes is approximately $1,126,769,000 (unaudited).
[3]	The Company’s assets are depreciated using the straight-line method over the useful lives of the assets by class. Generally, buildings and improvements are depreciated over 15-40 years.
[4]	Property collateralized under the unsecured credit facility. As of December 31, 2017, 40 commercial properties, consisting of 35 commercial properties classified as continuing operations and 5 commercial properties classified as discontinued operations, were collateralized under the unsecured credit facility and the Company had $0 aggregate principal amount outstanding thereunder.
[5]	The Vibra Denver Hospital was renovated in 1985.
[6]	The Houston Surgery Center was renovated in 2012.
[7]	Property classified as a part of discontinued operations.
[8]	The Andover Data Center was renovated in 2010.
[9]	The Physicians Specialty Hospital was renovated in 2009.
[10]	Formerly known as Victory Medical Center Landmark.
[11]	The Walnut Hill Medical Center was renovated in 2013.
[12]	The Phoenix Data Center and Scottsdale Data Center were both sold on January 10, 2018.
[13]	The Rhode Island Rehabilitation Healthcare Facility was renovated in 1999.
[14]	Formerly known as Victory IMF.
[15]	The Dermatology Assoc-York St was renovated in 2010.

Schedule III - Real Estate As92

Schedule III - Real Estate Assets and Accumulated Depreciation (Schedule of Real Estate Assets and Accumulated Depreciation - Narrative) (Details) $ in Thousands	Jan. 10, 2018	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Number of properties collateralized under unsecured credit facility		40
Unsecured credit facility, principal amount outstanding | $		$ 0	$ 358,000
Aggregated cost for federal income tax purposes | $		$ 1,126,769
Vibra Denver Hospital [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		1,985
Houston Surgery Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		2,012
Andover Data Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		2,010
Physicians' Specialty Hospital [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		2,009
Walnut Hill Medical Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		2,013
Phoenix Data Center [Member] | Subsequent Event [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date sold	Jan. 10, 2018
Scottsdale Data Center [Member] | Subsequent Event [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date sold	Jan. 10, 2018
Rhode Island Rehabilitation Healthcare Facility [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		1,999
Dermatology Assoc-York St [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year renovated		2,010
Building and improvements [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Life used for depreciation		15 years
Building and improvements [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Life used for depreciation		40 years
Continuing Operations [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Number of properties collateralized under unsecured credit facility		35
Discontinued Operations [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Number of properties collateralized under unsecured credit facility		5

Schedule III - Real Estate As93

Schedule III - Real Estate Assets and Accumulated Depreciation (Schedule of Changes in Real Estate Assets and 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	$ 2,163,358		$ 2,036,330	$ 1,845,136
Acquisitions	0		58,065	121,774
Improvements, net of write-offs	(11,533)		68,963	69,420
Dispositions	(951,593)		0	0
Balance at end of year	1,200,232	[1]	2,163,358	2,036,330
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	(152,486)		(100,142)	(52,785)
Depreciation	(49,483)		(52,344)	(47,357)
Dispositions	100,192		0	0
Balance at end of year	$ (101,777)	[2]	$ (152,486)	$ (100,142)
[1]	The aggregated cost for federal income tax purposes is approximately $1,126,769,000 (unaudited).
[2]	The Company’s assets are depreciated using the straight-line method over the useful lives of the assets by class. Generally, buildings and improvements are depreciated over 15-40 years.