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, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income	$ 106,168	$ 67,391	$ 85,882	$ 22,337	$ 173,559	$ 108,219
Income allocated to participating securities	(622)		(324)		(919)	(463)
Net income available to common shareholders	$ 105,546		$ 85,558		$ 172,640	$ 107,756
Denominator:
Weighted average shares of common stock outstanding – basic (in shares)	55,446		55,389		55,429	55,326
Basic earnings per share (in usd per share)	$ 1.90		$ 1.54		$ 3.11	$ 1.95
Numerator:
Net income	$ 106,168	$ 67,391	$ 85,882	$ 22,337	$ 173,559	$ 108,219
Income allocated to participating securities	(622)		(324)		(919)	(463)
Net income available to common shareholders	$ 105,546		$ 85,558		$ 172,640	$ 107,756
Denominator:
Weighted average shares of common stock outstanding – basic (in shares)	55,446		55,389		55,429	55,326
Diluted effect of stock options and PVRSUs (in shares)	524		411		583	405
Weighted average shares of common stock outstanding – diluted (in shares)	55,970		55,800		56,012	55,731
Diluted earnings per share (in usd per share)	$ 1.89		$ 1.53		$ 3.08	$ 1.93