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 (loss)	199,451			182,547	16,904
Dividends	(37,185)			(37,185)
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	8,455		8,455
Sale of treasury stock	255		115			140
Exercise of stock options	742		222			520
Ending Balance at Jun. 30, 2023	2,831,628	55,057	1,124,977	2,681,448	(685,831)	(344,023)
Beginning Balance at Mar. 31, 2023	2,814,659	55,057	1,120,877	2,609,928	(626,776)	(344,427)
Total comprehensive income (loss)	31,055			90,110	(59,055)
Dividends	(18,590)			(18,590)
Recognition of equity-based compensation	3,939		3,939
Sale of treasury stock	128		44			84
Exercise of stock options	437		117			320
Ending Balance at Jun. 30, 2023	2,831,628	55,057	1,124,977	2,681,448	(685,831)	(344,023)
Beginning Balance at Dec. 31, 2023	3,100,419	55,057	1,134,363	2,810,824	(556,935)	(342,890)
Total comprehensive income (loss)	162,904			211,603	(48,699)
Dividends	(38,275)			(38,275)
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	10,040		10,040
Sale of treasury stock	232		125			107
Exercise of stock options	178		54			124
Common stock issuance costs	(1,317)		(1,317)
Ending Balance at Jun. 30, 2024	3,227,347	55,057	1,132,301	2,984,152	(605,634)	(338,529)
Beginning Balance at Mar. 31, 2024	3,152,816	55,057	1,127,806	2,903,106	(594,538)	(338,615)
Total comprehensive income (loss)	90,249			101,345	(11,096)
Dividends	(20,299)			(20,299)
Recognition of equity-based compensation	5,769		5,769
Sale of treasury stock	102		55			47
Exercise of stock options	27		(12)			39
Common stock issuance costs	(1,317)		(1,317)
Ending Balance at Jun. 30, 2024	$ 3,227,347	$ 55,057	$ 1,132,301	$ 2,984,152	$ (605,634)	$ (338,529)