Earnings Per Share - Computations Of Basic And Diluted EPS (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic:
Net income (loss) attributable to common shareholders	$ (13,709)	$ 5,450	$ (16,587)	$ (6,488)
Less: Undistributed earnings allocated to participating securities		(37)
Less: Accretion of redeemable noncontrolling interests		(69)	(241)	(2,155)
Net income (loss) available to common shareholders, basic	$ (13,709)	$ 5,344	$ (16,828)	$ (8,643)
Weighted average number of shares outstanding, basic (in shares)	150,028	148,971	149,982	148,917
Diluted:
Net income (loss) available to common shareholders, basic	$ (13,709)	$ 5,344	$ (16,828)	$ (8,643)
Weighted average number of shares outstanding, basic (in shares)	150,028	148,971	149,982	148,917
Effect of dilutive securities:
Share-based awards other than participating securities (in shares)		720
Net income (loss) available to common shareholders, diluted	$ (13,709)	$ 5,344	$ (16,828)	$ (8,643)
Weighted average number of shares outstanding, diluted (in shares)	150,028	149,691	149,982	148,917