Shareholders' Equity and Earnings Per Common Share - Basic and Diluted Earnings (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Shareholders' Equity and Earnings Per Common Share
NET INCOME (LOSS)	$ (40,263)	$ (3,328)	$ 7,912	$ 24,920
Net (income) loss attributable to redeemable noncontrolling interests	3,483	288	(1,767)	(3,099)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	(36,780)	(3,040)	6,145	21,821
Distributions to participating securities	(907)	(996)	(907)	(996)
Net income (loss) available to common shareholders - basic	(37,687)	(4,036)	5,238	20,825
Net income (loss) available to common shareholders - diluted	$ (37,687)	$ (4,036)	$ 5,238	$ 20,825
Weighted average number of common shares outstanding - basic and diluted	133,613	131,754	134,078	127,189
Earnings per common share:
Earnings Per Share, Basic	$ (0.28)	$ (0.03)	$ 0.04	$ 0.16
Earnings Per Share, Diluted	$ (0.28)	$ (0.03)	$ 0.04	$ 0.16