Condensed Consolidated Statement of Equity - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Distributions in excess of earnings	Total stockholders' equity	Noncontrolling interests
Beginning balance (in shares) at Dec. 31, 2016	37,490,361	37,490,361
Beginning balance at Dec. 31, 2016	$ 348,978	$ 374	$ 197,114	$ (49,345)	$ 148,143	$ 200,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,157			16,895	16,895	7,262
Net proceeds from sale of common stock (in shares)		7,350,690
Net proceeds from sales of common stock	91,381	$ 74	91,307		91,381
Restricted stock awards (in shares)		116,704
Restricted stock awards	1,382	$ 1	1,381		1,382
Restricted stock award forfeitures (in shares)		(21,103)
Restricted stock award forfeitures	(289)		(289)		(289)
Issuance of common units for acquisition of interest in real estate investment	(5)		(987)		(987)	982
Redemption of operating partnership units	(229)		(41)		(41)	(188)
Dividends and distributions declared	$ (33,942)			(24,305)	(24,305)	(9,637)
Ending balance, shares (in shares) at Sep. 30, 2017	44,936,652	44,936,652
Ending balance at Sep. 30, 2017	$ 431,433	$ 449	$ 288,485	$ (56,755)	$ 232,179	$ 199,254