Earnings (Loss) Per Common Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 24,023	$ 11,341	$ 19,237	$ 17,659
Net income attributable to redeemable noncontrolling interests	3,574	0	2,980	0
Net loss attributable to noncontrolling interests	(125)	0	(127)	0
Net income attributable to common shareholders	20,574	11,341	16,384	17,659
Distributions to participating securities	(218)	0	(361)	0
Net income available to common shareholders — basic and diluted	$ 20,356	$ 11,341	$ 16,023	$ 17,659
Weighted average number of common shares outstanding — basic and diluted (1)	117,955	100,571	117,955	100,571
Earnings per common share:
Basic (in dollars per share)	$ 0.17	$ 0.11	$ 0.14	$ 0.18
Diluted (in dollars per share)	$ 0.17	$ 0.11	$ 0.14	$ 0.18