Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Beginning Balance at Dec. 31, 2022	$ 2,667,093	$ 55,057	$ 1,125,949	$ 2,536,086	$ (702,735)	$ (347,264)
Total comprehensive income	168,396			92,437	75,959
Dividends	(18,595)			(18,595)
Purchase of treasury stock	(7,902)					(7,902)
Issuances of equity awards, net of forfeitures	719		(9,764)			10,483
Recognition of equity-based compensation	4,516		4,516
Sale of treasury stock	127		71			56
Exercise of stock options	305		105			200
Ending Balance at Mar. 31, 2023	2,814,659	55,057	1,120,877	2,609,928	(626,776)	(344,427)
Beginning Balance at Dec. 31, 2023	3,100,419	55,057	1,134,363	2,810,824	(556,935)	(342,890)
Total comprehensive income	72,655			110,258	(37,603)
Dividends	(17,976)			(17,976)
Purchase of treasury stock	(7,537)					(7,537)
Issuances of equity awards, net of forfeitures	703		(10,964)			11,667
Recognition of equity-based compensation	4,271		4,271
Sale of treasury stock	130		70			60
Exercise of stock options	151		66			85
Ending Balance at Mar. 31, 2024	$ 3,152,816	$ 55,057	$ 1,127,806	$ 2,903,106	$ (594,538)	$ (338,615)