CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Total	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2021			$ 49,187	$ 127,104	$ 2,908,827	$ (190,465)	$ (1,068,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		$ 111,557			111,557
Other Comprehensive Income (Loss), Net of Tax		(37,407)				(37,407)
Dividends paid					(14,220)
Restricted stock				(8,523)			8,523
Employee stock purchase plan				814			4,470
Share-based compensation				7,427			153
Repurchases of common stock	[1]						(31,645)
Other				(506)			506
Ending Balance at Jun. 30, 2022			49,187	126,316	3,006,164	(227,872)	(1,086,156)
Beginning Balance at Dec. 31, 2021			49,187	127,104	2,908,827	(190,465)	(1,068,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax		(68,451)
Ending Balance at Dec. 31, 2022		1,992,119	49,187	134,553	3,174,396	(258,916)	(1,107,101)
Beginning Balance at Mar. 31, 2022			49,187	122,603	2,942,580	(191,524)	(1,073,426)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		70,872			70,872
Other Comprehensive Income (Loss), Net of Tax		(36,348)				(36,348)
Dividends paid					(7,288)
Share-based compensation				3,713			58
Repurchases of common stock	[1]						(12,788)
Ending Balance at Jun. 30, 2022			49,187	126,316	3,006,164	(227,872)	(1,086,156)
Beginning Balance at Dec. 31, 2022		1,992,119	49,187	134,553	3,174,396	(258,916)	(1,107,101)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		137,845			137,845
Other Comprehensive Income (Loss), Net of Tax		33,541				33,541
Dividends paid					(14,960)
Restricted stock				(13,878)			13,878
Employee stock purchase plan				1,483			3,742
Share-based compensation				8,949			(90)
Repurchases of common stock							(24,365)
Other				(261)			261
Ending Balance at Jun. 30, 2023		2,138,264	49,187	130,846	3,297,281	(225,375)	(1,113,675)
Beginning Balance at Mar. 31, 2023			49,187	126,909	3,223,944	(244,442)	(1,101,439)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		80,999			80,999
Other Comprehensive Income (Loss), Net of Tax		19,067				19,067
Dividends paid					(7,662)
Restricted stock				(73)			73
Share-based compensation				4,010			(330)
Repurchases of common stock							(11,979)
Ending Balance at Jun. 30, 2023		$ 2,138,264	$ 49,187	$ 130,846	$ 3,297,281	$ (225,375)	$ (1,113,675)

[1] For the three and six months ended June 30, 2023, the Corporation repurchased approximately 0.1 million and 0.1 million shares of its common stock, respectively. For the three and six months ended June 30, 2022, the Corporation repurchased approximately 0.1 million and 0.2 million shares of its common stock, respectively.