STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Retained Earnings Member Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income Member	Accumulated Other Comprehensive Income Member Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock Member
Beginning Balance at Dec. 31, 2018		$ 49,187	$ 118,234	$ 2,191,471		$ (288,447)		$ (539,664)
Accounting Standards Update [Extensible List]	Accounting Standards Update 2018-02 [Member]
Net earnings	$ 307,583			307,583
Other Comprehensive Income (Loss), Net of Tax	(10,570)					(10,570)
Dividends paid				(28,200)
Restricted Stock			(10,483)					10,483
Stock options exercised, net			(4,226)					15,996
Share-based compensation			13,264					405
Repurchase of common stock								(50,661)
Other			(719)	0				719
Ending Balance at Dec. 31, 2019		49,187	116,070	2,497,111	$ 26,257	(325,274)	$ (26,257)	(562,722)
Net earnings	201,392			201,392
Other Comprehensive Income (Loss), Net of Tax	14,418					14,418
Dividends paid				(28,175)
Restricted Stock			(4,115)					4,115
Stock options exercised, net			(3,286)					14,434
Share-based compensation			14,383					54
Repurchase of common stock								(200,018)
Other			(517)					517
Ending Balance at Dec. 31, 2020	1,787,574	49,187	122,535	2,670,328		(310,856)		(743,620)
Net earnings	267,159
Other Comprehensive Income (Loss), Net of Tax	120,391					120,391
Dividends paid				(28,660)
Restricted Stock			(9,007)					9,007
Stock Issued During Period, Value, Employee Stock Purchase Plan			877					8,828
Share-based compensation			13,296					154
Repurchase of common stock								(343,129)
Other			(597)					597
Ending Balance at Dec. 31, 2021	$ 1,826,490	$ 49,187	$ 127,104	$ 2,908,827		$ (190,465)		$ (1,068,163)