Capital Stock (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Components Of Common Stock [Line Items]
Authorized capital, shares (in shares)	363,000,000	363,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	360,000,000	360,000,000	360,000,000
Preferred stock, shares authorized (in shares)	3,000,000	3,000,000	3,000,000
Acquisition of treasury stock		$ 38,137,000	$ 22,213,000	$ 28,073,000
Seriesa Junior Participating Preferred
Schedule Of Components Of Common Stock [Line Items]
Preferred stock, shares authorized (in shares)	240,000	240,000
2021 Repurchase Program
Schedule Of Components Of Common Stock [Line Items]
Stock repurchase program, authorized amount	$ 50,000,000	$ 50,000,000
Amount remaining under repurchase authorization	$ 25,000,000	$ 25,000,000
Shares withheld for tax withholding obligation (in shares)		433,505
Shares withheld for tax withholding obligation		$ 13,471,000
Treasury Stock
Schedule Of Components Of Common Stock [Line Items]
Acquisition of treasury stock (in shares)		1,380,000	1,181,000	1,690,000
Acquisition of treasury stock		$ 38,490,000	$ 22,213,000	$ 28,073,000
Treasury Stock | 2021 Repurchase Program
Schedule Of Components Of Common Stock [Line Items]
Acquisition of treasury stock (in shares)	946,600
Stock repurchased, average cost per share (in dollars per share)		$ 26.41
Acquisition of treasury stock	$ 25,000,000