Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ (9,555)	$ 30,156	$ 2,944
Adjustments to reconcile net income to cash flow from operating activities:
Depreciation and amortization	34,824	28,094	12,520
Amortization of deferred financing costs and premium on indebtedness, net	2,757	389	(660)
Stock compensation expense	1,222	495	206
Net (gains) losses on sale of assets	(31,776)	(6,412)
Net (gains) losses on extinguishment of debt	1,210
TSRE financing extinguishment expenses		23,219
(Gains) losses on TSRE merger and property acquisitions	(732)	(64,604)	(2,882)
Changes in assets and liabilities:
Accounts receivable and other assets	(477)	5,570	764
Accounts payable and accrued expenses	(4,328)	3,362	2,670
Accrued interest payable	(715)	1,060	(14)
Other liabilities	37	(2,604)	176
Net cash provided by operating activities	(7,533)	18,725	15,724
Cash flows from investing activities:
Acquisition of real estate properties		(24,746)	(299,881)
Disposition of real estate properties	39,690	17,524
Acquisition of advisory and management contracts	(143)
TSRE merger, net of cash acquired		(137,096)
Capital expenditures	(10,663)	(8,941)	(4,158)
Deposit paid for future acquisition	(1,000)
(Increase) decrease in restricted cash	(105)	(207)	(3,298)
Cash flow used in investing activities	27,779	(153,466)	(307,337)
Cash flows from financing activities:
Proceeds (payments) from issuance of common stock	245,309	(188)	189,587
Payments related to repurchase of common stock	(62,156)
TSRE financing extinguishment expenses		(23,219)
Proceeds from Secured Credit Facility and mortgage indebtedness	209,481	488,725	154,650
Secured Credit Facility and mortgage principal repayments	(390,089)	(272,751)	(26,001)
Payments for deferred financing costs	(1,485)	(7,998)	(89)
Distributions on common stock	(36,575)	(25,103)	(14,978)
Distributions to noncontrolling interests	(2,140)	(1,187)	(127)
Net cash from financing activities	(37,655)	158,279	303,042
Net change in cash and cash equivalents	(17,409)	23,538	11,429
Cash and cash equivalents, beginning of period	38,301	14,763	3,334
Cash and cash equivalents, end of the period	20,892	38,301	14,763
Supplemental cash flow information:
Cash paid for interest	33,034	22,105	9,170
Non-cash decrease in noncontrolling interest from conversion of common limited partnership units to shares of common stock	2,290	493
Distributions declared but not paid	$ 4,297	3,006	1,982
Value of common stock issued		109,857
Value of limited partnership units issued in acquisitions		13,998	11,961
Mortgage debt assumed		$ 121,885	$ 66,963