Earnings Per Share - Computations Of Basic And Diluted EPS (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic:
Net income attributable to common shareholders	$ 24,499	$ 31,695	$ 18,011	$ 49,867
Less: Undistributed earnings allocated to participating securities	(180)	(261)	(117)	(435)
Accretion of redeemable noncontrolling interests	(128)	(25)	(2,283)	(43)
Net income available to common shareholders, basic	$ 24,191	$ 31,409	$ 15,611	$ 49,389
Weighted average number of shares outstanding, basic (in shares)	149,032	147,575	148,956	147,506
Effect of dilutive securities:
Net income available to common shareholders, basic	$ 24,191	$ 31,409	$ 15,611	$ 49,389
Share-based awards other than participating securities	$ 0	$ 0	$ 0	$ 0
Share-based awards other than participating securities (in shares)	919	779	868	580
Undistributed earnings reallocated to participating securities	$ 2	$ 1	$ 1	$ 2
Net income available to common shareholders, diluted	$ 24,193	$ 31,410	$ 15,612	$ 49,391
Weighted average number of shares outstanding, diluted (in shares)	149,951	148,354	149,824	148,086