Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common stock	Paid-in Capital	Accumulated Other Comprehensive Earnings (Loss) Cumulative Effect, Period of Adoption, Adjustment	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
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2019	$ 678	$ 321,190	$ 22	$ 52,473	$ 1,073	$ 1,014,046	$ 7,980	$ (400,979)	$ 1,095	$ 995,388
Shares, Outstanding, Beginning Balance at Dec. 31, 2019	44,869,015
Increase Decrease In Stockholders Equity Roll Forward
Net earnings (loss)						157,091				157,091
Other comprehensive earnings (loss), net of tax				56,219						56,219
Deferred compensation							312	(312)
Share-based compensation	$ 3	14,175								14,178
Share-based compensation (in shares)	273,565
Dividends and dividend equivalents						(87,993)				(87,993)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2020	$ 681	335,365		108,714		1,084,217	8,292	(401,291)		1,135,978
Shares, Outstanding, Ending Balance at Dec. 31, 2020	45,142,580
Increase Decrease In Stockholders Equity Roll Forward
Net earnings (loss)						279,354				279,354
Other comprehensive earnings (loss), net of tax				(58,888)						(58,888)
Deferred compensation							1,350	(1,350)
Share-based compensation	$ 1	8,377								8,378
Share-based compensation (in shares)	146,757
Dividends and dividend equivalents						(135,461)				(135,461)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2021	$ 682	343,742		49,826		1,228,110	9,642	(402,641)		1,229,361
Shares, Outstanding, Ending Balance at Dec. 31, 2021	45,289,337
Increase Decrease In Stockholders Equity Roll Forward
Net earnings (loss)						583,411				583,411
Other comprehensive earnings (loss), net of tax				(278,902)						(278,902)
Deferred compensation							2,373	(2,373)
Share-based compensation	$ 2	8,649								8,651
Share-based compensation (in shares)	180,415
Dividends and dividend equivalents						(365,180)				(365,180)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2022	$ 684	$ 352,391		$ (229,076)		$ 1,446,341	$ 12,015	$ (405,014)		$ 1,177,341
Shares, Outstanding, Ending Balance at Dec. 31, 2022	45,469,752