Earnings Per Share - Computations Of Basic And Diluted EPS (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic:
Net income (loss) attributable to common shareholders	$ 5,450	$ 16,854	$ (6,488)	$ 18,172
Less: Undistributed earnings allocated to participating securities	(37)	(141)	0	(159)
Accretion of redeemable noncontrolling interests	(69)	(18)	(2,155)	(18)
Net income (loss) available to common shareholders, basic	$ 5,344	$ 16,695	$ (8,643)	$ 17,995
Weighted average number of shares outstanding, basic (in shares)	148,971	147,521	148,917	147,471
Effect of dilutive securities:
Net income (loss) available to common shareholders, basic	$ 5,344	$ 16,695	$ (8,643)	$ 17,995
Share-based awards other than participating securities	$ 0	$ 0	$ 0	$ 0
Share-based awards other than participating securities (in shares)	720	580	0	460
Net income (loss) available to common shareholders, diluted	$ 5,344	$ 16,695	$ (8,643)	$ 17,995
Weighted average number of shares outstanding, diluted (in shares)	149,691	148,101	148,917	147,931