CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Total	Previously Reported	Revision of Prior Period, Error Correction, Adjustment	Common Stock	Common Stock Previously Reported	Additional Paid in Capital	Additional Paid in Capital Previously Reported	Retained Earnings	Retained Earnings Previously Reported	Retained Earnings Revision of Prior Period, Error Correction, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Previously Reported	Treasury Stock	Treasury Stock Previously Reported
Beginning Balance at Dec. 31, 2021					$ 49,187	$ 49,187	$ 127,104	$ 127,104	$ 2,897,922	$ 2,908,827	$ (10,905)	$ (190,465)	$ (190,465)	$ (1,068,163)	$ (1,068,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		$ 185,325							185,325
Other comprehensive income, net of tax		(83,649)										(83,649)
Dividends paid									(21,513)
Restricted stock							(8,523)							8,523
Employee stock purchase plan							1,273							8,724
Share-based compensation							11,882							145
Repurchases of common stock	[1]													(44,434)
Other							(506)							506
Ending Balance at Sep. 30, 2022					49,187		131,230		3,061,734			(274,114)		(1,094,699)
Beginning Balance at Dec. 31, 2021					49,187	49,187	127,104	127,104	2,897,922	2,908,827	(10,905)	(190,465)	(190,465)	(1,068,163)	(1,068,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income, net of tax		(68,451)
Ending Balance at Dec. 31, 2022		1,981,214	$ 1,992,119	$ (10,905)	49,187	49,187	134,553	134,553	3,163,491	3,174,396	(10,905)	(258,916)	(258,916)	(1,107,101)	(1,107,101)
Beginning Balance at Jun. 30, 2022					49,187	49,187	126,316	126,316	2,995,259	3,006,164	(10,905)	(227,872)	(227,872)	(1,086,156)	(1,086,156)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		73,768							73,768
Other comprehensive income, net of tax		(46,242)										(46,242)
Dividends paid									(7,293)
Employee stock purchase plan							459							4,254
Share-based compensation							4,455							(8)
Repurchases of common stock	[1]													(12,789)
Ending Balance at Sep. 30, 2022					49,187		131,230		3,061,734			(274,114)		(1,094,699)
Beginning Balance at Dec. 31, 2022		1,981,214	$ 1,992,119	$ (10,905)	49,187	49,187	134,553	134,553	3,163,491	3,174,396	(10,905)	(258,916)	(258,916)	(1,107,101)	(1,107,101)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		234,623							234,623
Other comprehensive income, net of tax		5,500										5,500
Dividends paid									(22,612)
Restricted stock							(13,878)							13,878
Employee stock purchase plan							3,312							7,271
Share-based compensation							12,884							329
Repurchases of common stock														(37,366)
Other							(261)							261
Ending Balance at Sep. 30, 2023		2,185,155			49,187		136,610		3,375,502			(253,416)		(1,122,728)
Beginning Balance at Jun. 30, 2023					49,187	$ 49,187	130,846	$ 130,846	3,286,376	$ 3,297,281	$ (10,905)	(225,375)	$ (225,375)	(1,113,675)	$ (1,113,675)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		96,778							96,778
Other comprehensive income, net of tax		(28,041)										(28,041)
Dividends paid									(7,652)
Employee stock purchase plan							1,829							3,529
Share-based compensation							3,935							419
Repurchases of common stock														(13,001)
Ending Balance at Sep. 30, 2023		$ 2,185,155			$ 49,187		$ 136,610		$ 3,375,502			$ (253,416)		$ (1,122,728)

[1] For the three and nine months ended September 30, 2023, the Corporation repurchased approximately 0.1 million and 0.2 million shares of its common stock, respectively. For the three and nine months ended September 30, 2022, the Corporation repurchased approximately 0.1 million and 0.3 million shares of its common stock, respectively.