Earnings Per Share - Computation Of Basic And Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income	$ 84,710	$ 52,820	$ 106,168	$ 67,391	$ 137,530	$ 173,559
Income allocated to participating securities	(437)		(622)		(750)	(919)
Net income available to common shareholders	$ 84,273		$ 105,546		$ 136,780	$ 172,640
Denominator:
Weighted average shares of common stock outstanding – basic (in shares)	50,626		55,446		50,946	55,429
Basic earnings per share (in usd per share)	$ 1.66		$ 1.90		$ 2.68	$ 3.11
Numerator:
Net income	$ 84,710	$ 52,820	$ 106,168	$ 67,391	$ 137,530	$ 173,559
Income allocated to participating securities	(437)		(622)		(750)	(919)
Net income available to common shareholders	$ 84,273		$ 105,546		$ 136,780	$ 172,640
Denominator:
Weighted average shares of common stock outstanding – basic (in shares)	50,626		55,446		50,946	55,429
Diluted effect of stock options and PVRSUs (in shares)	365		524		405	583
Weighted average shares of common stock outstanding – diluted (in shares)	50,991		55,970		51,351	56,012
Diluted earnings per share (in usd per share)	$ 1.65		$ 1.89		$ 2.66	$ 3.08