Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Additional paid-in capital	Distributions in excess of earnings	Accumulated other comprehensive loss	Total stockholders' equity (deficit)	Noncontrolling interests in investment entities	Noncontrolling interests in Operating Partnership	Redeemable convertible preferred stock	Redeemable convertible preferred stock Preferred stock	Redeemable convertible preferred stock Additional paid-in capital	Redeemable convertible preferred stock Total stockholders' equity (deficit)
Beginning balance at Dec. 31, 2016	$ 348,978	$ 0	$ 374	$ 197,114	$ (49,345)	$ 0	$ 148,143	$ 0	$ 200,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,925				21,047		21,047		8,878
Net proceeds from issuance of stock	91,381		74	91,307			91,381
Restricted stock awards, net of tax withholding	1,443		1	1,442			1,443
Unrealized cash flow hedge losses	0
Realized cash flow hedge losses reclassified to net income	0
Noncontrolling interest in acquired real estate entity	0
Restricted stock award forfeitures	(2)			(2)			(2)
Acquisitions of noncontrolling interests in real estate investments	(511)			(1,493)			(1,493)		982
Redemption of operating partnership units	(5,155)			(961)			(961)		(4,194)
Dividends and distributions declared	(45,776)				(32,868)		(32,868)		(12,908)
Ending balance at Dec. 31, 2017	420,283	0	449	287,407	(61,166)	0	226,690	0	193,593
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,492				17,203		17,203		6,289
Net proceeds from issuance of stock	65,244		46	65,198			65,244
Restricted stock awards, net of tax withholding	1,564		2	1,562			1,564
Unrealized cash flow hedge losses	(1,894)					(1,410)	(1,410)		(484)
Realized cash flow hedge losses reclassified to net income	169					127	127		42
Noncontrolling interest in acquired real estate entity	0
Restricted stock award forfeitures	(32)			(32)			(32)
Issuance of operating partnership units for acquisitions	2,196			(5)			(5)		2,201
Redemption of operating partnership units	(2,595)		3	3,223			3,226		(5,821)
Dividends and distributions declared	(52,537)				(38,736)		(38,736)		(13,801)
Ending balance at Dec. 31, 2018	455,890	0	500	357,353	(82,699)	(1,283)	273,871	0	182,019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	32,258				24,053		24,053	213	7,992
Net proceeds from issuance of stock	96,845		59	96,786			96,845			$ 61,001	$ 63,250	$ (2,249)	$ 61,001
Restricted stock awards, net of tax withholding	2,031		2	2,029			2,031
Unrealized cash flow hedge losses	(4,504)					(3,321)	(3,321)		(1,183)
Realized cash flow hedge losses reclassified to net income	501					364	364		137
Noncontrolling interest in acquired real estate entity	4,870							4,870
Restricted stock award forfeitures	(7)			(7)			(7)
Issuance of operating partnership units for acquisitions	72,183			(986)			(986)		73,169
Redemption of operating partnership units	0		2	2,754			2,756		(2,756)
Dividends and distributions declared on preferred stock	(2,455)				(2,455)		(2,455)			$ (2,500)
Dividends and distributions declared	(621)							(621)
Dividends and distributions declared on common shares and units	62,378				45,450		45,450		16,928
Ending balance at Dec. 31, 2019	$ 655,447	$ 63,250	$ 563	$ 455,680	$ (106,676)	$ (4,240)	$ 408,577	$ 4,462	$ 242,408