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, 2023			$ 49,187	$ 140,182	$ 3,487,751	$ (213,223)	$ (1,135,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		$ 287,126			287,126
Other comprehensive income (loss), net of tax		9,795				9,795
Dividends declared					(23,694)
Restricted stock				(13,944)			13,944
Employee stock purchase plan				5,714			5,631
Share-based compensation				14,934			230
Repurchases of common stock	[1]						(137,580)
Other				(2,492)			2,342
Ending Balance at Sep. 30, 2024			49,187	144,394	3,751,183	(203,428)	(1,250,917)
Beginning Balance at Dec. 31, 2023			49,187	140,182	3,487,751	(213,223)	(1,135,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss), net of tax		(30,002)
Ending Balance at Dec. 31, 2024		2,449,799	49,187	147,940	3,861,073	(243,225)	(1,365,176)
Beginning Balance at Jun. 30, 2024			49,187	135,574	3,648,005	(233,488)	(1,140,858)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		111,160			111,160
Other comprehensive income (loss), net of tax		30,060				30,060
Dividends declared					(7,982)
Restricted stock				(65)			65
Employee stock purchase plan				3,230			2,643
Share-based compensation				5,683			15
Repurchases of common stock	[1]						(112,784)
Other				(28)			2
Ending Balance at Sep. 30, 2024			49,187	144,394	3,751,183	(203,428)	(1,250,917)
Beginning Balance at Dec. 31, 2024		2,449,799	49,187	147,940	3,861,073	(243,225)	(1,365,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		347,230			347,230
Other comprehensive income (loss), net of tax		57,297				57,297
Dividends declared					(25,881)
Restricted stock				(11,296)			11,296
Employee stock purchase plan				8,310			4,228
Share-based compensation				16,536			74
Repurchases of common stock	[1]						(328,112)
Other				(1,070)			1,070
Ending Balance at Sep. 30, 2025		2,529,481	49,187	160,420	4,182,422	(185,928)	(1,676,620)
Beginning Balance at Jun. 30, 2025			49,187	149,650	4,066,497	(168,117)	(1,385,497)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		124,832			124,832
Other comprehensive income (loss), net of tax		(17,811)				(17,811)
Dividends declared					(8,907)
Restricted stock				(9)			9
Employee stock purchase plan				4,653			1,904
Share-based compensation				6,126			0
Repurchases of common stock	[1]						(293,036)
Ending Balance at Sep. 30, 2025		$ 2,529,481	$ 49,187	$ 160,420	$ 4,182,422	$ (185,928)	$ (1,676,620)

[1] For the three and nine months ended September 30, 2025, the Corporation repurchased approximately 582,000 and 684,000 shares of its common stock, respectively. For the three and nine months ended September 30, 2024, the Corporation repurchased approximately 356,000 and 455,000 shares of its common stock, respectively.