Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common stock	Paid-in Capital	Accumulated Other Comprehensive Earnings (Loss)	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Deferred Compensation	Treasury Stock at Cost	Cumulative Effect, Period of Adoption, Adjustment	Total
Shareholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2022	$ 684	$ 352,391	$ (229,076)	$ (951)	$ 1,446,341	$ 12,015	$ (405,014)	$ (951)	$ 1,177,341
Shares, Outstanding, Beginning Balance at Dec. 31, 2022	45,469,752
Increase Decrease In Shareholders Equity Roll Forward
Net Income (Loss)					98,811				98,811
Other comprehensive earnings (loss), net of tax			37,707						37,707
Deferred compensation						249	(249)
Share-based compensation	$ 1	2,863							2,864
Share-based compensation (in shares)	84,944
Dividends and dividend equivalents					(11,851)				(11,851)
Shareholders' Equity Attributable to Parent, Ending Balance at Mar. 31, 2023	$ 685	355,254	(191,369)		1,532,350	12,264	(405,263)		1,303,921
Shares, Outstanding, Ending Balance at Mar. 31, 2023	45,554,696
Shareholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2023	$ 686	362,345	(166,303)		1,609,785	13,539	(406,538)		1,413,514
Shares, Outstanding, Beginning Balance at Dec. 31, 2023	45,640,047
Increase Decrease In Shareholders Equity Roll Forward
Net Income (Loss)					127,900				127,900
Other comprehensive earnings (loss), net of tax			(12,671)						(12,671)
Deferred compensation						(790)	790
Share-based compensation	$ 1	4,356							4,357
Share-based compensation (in shares)	69,834
Dividends and dividend equivalents					(12,348)				(12,348)
Shareholders' Equity Attributable to Parent, Ending Balance at Mar. 31, 2024	$ 687	$ 366,701	$ (178,974)		$ 1,725,337	$ 12,749	$ (405,748)		$ 1,520,752
Shares, Outstanding, Ending Balance at Mar. 31, 2024	45,709,881