CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss (income)	Treasury Stock, Common
Common stock, shares issued, beginning balance (in shares) at Dec. 31, 2020		47,812
Common stock, shares issued, ending balance (in shares) at Dec. 31, 2021		47,929
Treasury shares, beginning balance (in shares) at Dec. 31, 2020						1,132
Beginning Balance at Dec. 31, 2020	$ 3,336,457	$ 47,812	$ 652,305	$ 3,096,228	$ (297,298)	$ (162,590)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	485,374			485,374
Cash dividends	(63,648)			(63,648)
Other comprehensive (loss) income	(49,661)				(49,661)
Shares issued under compensation plans (in shares)		(117)				(31)
Shares issued under compensation plans	34,453	$ 117	33,989			$ 347
Treasury stock reissued (in shares)		0				(28)
Treasury stock reissued	11,097	$ 0	6,349			$ 4,748
Deferred compensation (in shares)						(4)
Deferred compensation	676		447			$ 229
Treasury shares, ending balance (in shares) at Dec. 31, 2021						1,069
Ending Balance at Dec. 31, 2021	$ 3,754,748	$ 47,929	693,090	3,517,954	(346,959)	$ (157,266)
Common stock, shares issued, ending balance (in shares) at Dec. 31, 2022	47,957	47,957
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 363,139			363,139
Cash dividends	(63,789)			(63,789)
Other comprehensive (loss) income	(56,563)				(56,563)
Shares issued under compensation plans (in shares)		(28)				(32)
Shares issued under compensation plans	23,502	$ 28	21,930			$ 1,544
Deferred compensation (in shares)						(5)
Deferred compensation	931		98			$ 833
Treasury shares, ending balance (in shares) at Dec. 31, 2022						1,032
Ending Balance at Dec. 31, 2022	$ 4,021,968	$ 47,957	715,118	3,817,304	(403,522)	$ (154,889)
Common stock, shares issued, ending balance (in shares) at Dec. 31, 2023	48,046	48,046
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 356,328			356,328
Cash dividends	(63,896)			(63,896)
Other comprehensive (loss) income	89,117				89,117
Shares issued under compensation plans (in shares)		(89)				(21)
Shares issued under compensation plans	37,146	$ 89	34,270			$ 2,787
Deferred compensation (in shares)						(5)
Deferred compensation	325		324			$ 1
Treasury shares, ending balance (in shares) at Dec. 31, 2023						1,006
Ending Balance at Dec. 31, 2023	$ 4,440,988	$ 48,046	$ 749,712	$ 4,109,736	$ (314,405)	$ (152,101)