Shareholders' Equity and Earnings Per Common Share - Basic and Diluted Earnings (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Shareholders' Equity and Earnings Per Common Share
Net income (loss)	$ (25,005)	$ 10,532	$ (17,093)	$ 35,452
Net (income) loss attributable to redeemable noncontrolling interests	2,212	(1,172)	445	(4,271)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	(22,793)	9,360	(16,648)	31,181
Distributions to participating securities	(822)	(679)	(1,729)	(1,674)
Net income (loss) available to common shareholders - basic	(23,615)	8,681	(18,377)	29,507
Net income (loss) available to common shareholders - diluted	$ (24,726)	$ 8,681	$ (19,488)	$ 29,507
Weighted average number of common shares outstanding - basic and diluted	133,620	134,127	133,924	129,527
Earnings (loss) per common share:
Earnings, (loss) Per Share, Basic	$ (0.18)	$ 0.06	$ (0.14)	$ 0.23
Earnings, (loss) Per Share, Diluted	$ (0.18)	$ 0.06	$ (0.14)	$ 0.23