Real Estate - Pro-forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Real Estate [Abstract]
Revenue	$ 85,786	$ 83,794	$ 258,437	$ 202,458
Net income	7,116	10,456	27,789	32,940
Net income (loss) attributable to noncontrolling interests	200	230	781	515
Distributions to redeemable noncontrolling interests attributable to common stockholders	(90)	(91)	(268)	(268)
Net income (loss) attributable to common stockholders	$ 6,826	$ 7,806	$ 26,740	$ 14,808
Net income (loss) to common stockholders per share, basic and diluted (in dollars per share)	$ 0.04	$ 0.04	$ 0.15	$ 0.10