Earnings (Loss) Per Common Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ (18,752)	$ (77,991)	$ 11,341	$ 6,318	$ 12,630	$ 21,014	$ 16,783	$ 11,547	$ (79,084)	$ 61,974	$ 49,628
Net loss attributable to redeemable noncontrolling interests									(7,328)	0	0
Net loss attributable to noncontrolling interest									(3)	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS									(71,753)	61,974	49,628
Distributions to participating securities									(1,655)	0	0
Net income (loss) available to common shareholders	$ (16,418)	$ (69,831)	$ 11,341	$ 6,318	$ 12,630	$ 21,014	$ 16,783	$ 11,547	$ (73,408)	$ 61,974	$ 49,628
Weighted average number of shares outstanding - basic and diluted ( in shares)									105,359	100,571	100,571
Earnings (loss) per common share:
Basic (in dollars per share)	$ (0.15)	$ (0.61)	$ 0.11	$ 0.06	$ 0.13	$ 0.21	$ 0.17	$ 0.11	$ (0.70)	$ 0.62	$ 0.49
Diluted (in dollars per share)	$ (0.15)	$ (0.61)	$ 0.11	$ 0.06	$ 0.13	$ 0.21	$ 0.17	$ 0.11	$ (0.70)	$ 0.62	$ 0.49