Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock, Common	Accumulated Other Comprehensive Income (Loss) [Member]	Non-Controlling Interest [Member]
Balance at Dec. 31, 2023	$ 2,964,230	$ 655,322	$ 3,162,622	$ 53,183	$ (35,599)	$ (891,412)	$ 20,114
Net income	397,157			390,223			6,934
Other comprehensive income (loss)	314,508					314,508
Distributions to non-controlling interest	(5,590)						(5,590)
Purchase of treasury stock	(124,603)				(124,603)
Stock Issued During Period RSAs and SARs	0		(21,053)		21,053
Stock-based compensation	12,731		12,731
Cash dividends per share, Common Stock, Cash	(104,894)			(104,894)
Balance at Sep. 30, 2024	$ 3,453,539	655,322	3,154,300	338,512	(139,149)	(576,904)	21,458
Common Stock, Dividends, Per Share, Cash Paid	$ 0.771
Balance at Jun. 30, 2024	$ 3,158,335	655,322	3,153,107	235,299	(98,176)	(807,817)	20,600
Net income	140,263			138,007			2,256
Other comprehensive income (loss)	230,913					230,913
Distributions to non-controlling interest	(1,398)						(1,398)
Purchase of treasury stock	(44,060)				(44,060)
Stock Issued During Period RSAs and SARs	0		(3,087)		3,087
Stock-based compensation	4,280		4,280
Cash dividends per share, Common Stock, Cash	(34,794)			(34,794)
Balance at Sep. 30, 2024	$ 3,453,539	655,322	3,154,300	338,512	(139,149)	(576,904)	21,458
Common Stock, Dividends, Per Share, Cash Paid	$ 0.257
Balance at Dec. 31, 2024	$ 3,332,475	676,054	3,395,645	45,494	(48,401)	(758,911)	22,594
Net income	428,018			425,589			2,429
Other comprehensive income (loss)	225,245					225,245
Distributions to non-controlling interest	(3,641)						(3,641)
Purchase of treasury stock	(91,544)				(91,544)
Stock Issued During Period RSAs and SARs	(4)		(17,977)		17,973
Stock-based compensation	12,858		12,858
Cash dividends per share, Common Stock, Cash	(110,360)			(110,360)
Balance at Sep. 30, 2025	$ 3,793,047	676,054	3,390,526	360,723	(121,972)	(533,666)	21,382
Common Stock, Dividends, Per Share, Cash Paid	$ 0.825
Balance at Jun. 30, 2025	$ 3,660,114	676,054	3,386,218	255,938	(96,589)	(581,049)	19,542
Net income	143,622			141,518			2,104
Other comprehensive income (loss)	47,383					47,383
Distributions to non-controlling interest	(264)						(264)
Purchase of treasury stock	(25,468)				(25,468)
Stock Issued During Period RSAs and SARs	0		(85)		85
Stock-based compensation	4,393		4,393
Cash dividends per share, Common Stock, Cash	(36,733)			(36,733)
Balance at Sep. 30, 2025	$ 3,793,047	$ 676,054	$ 3,390,526	$ 360,723	$ (121,972)	$ (533,666)	$ 21,382
Common Stock, Dividends, Per Share, Cash Paid	$ 0.275