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, 2022	$ 2,481,577	$ 629,319	$ 2,932,959	$ 31,620	$ (41,743)	$ (1,086,864)	$ 16,286
Net income	251,016			247,241			3,775
Other comprehensive income (loss)	50,569					50,569
Distributions to non-controlling interest	(2,145)						(2,145)
Purchase of treasury stock	(36,563)				(36,563)
Sale of non-controlling interest of subsidiary	0		46				(46)
Stock Issued During Period RSAs and SARs	0		(19,917)		19,917
Stock-based compensation	8,277		8,277
Cash dividends per share, Common Stock, Cash	(67,503)			(67,503)
Balance at Jun. 30, 2023	$ 2,685,228	629,319	2,921,365	211,358	(58,389)	(1,036,295)	17,870
Common Stock, Dividends, Per Share, Cash Paid	$ 0.514
Balance at Mar. 31, 2023	$ 2,682,412	629,319	2,919,060	117,313	(59,670)	(940,498)	16,888
Net income	130,463			127,789			2,674
Other comprehensive income (loss)	(95,797)					(95,797)
Distributions to non-controlling interest	(1,692)						(1,692)
Purchase of treasury stock	(318)				(318)
Stock Issued During Period RSAs and SARs	0		(1,599)		1,599
Stock-based compensation	3,904		3,904
Cash dividends per share, Common Stock, Cash	(33,744)			(33,744)
Balance at Jun. 30, 2023	$ 2,685,228	629,319	2,921,365	211,358	(58,389)	(1,036,295)	17,870
Common Stock, Dividends, Per Share, Cash Paid	$ 0.257
Balance at Dec. 31, 2023	$ 2,964,230	655,322	3,162,622	53,183	(35,599)	(891,412)	20,114
Net income	256,894			252,216			4,678
Other comprehensive income (loss)	83,595					83,595
Distributions to non-controlling interest	(4,192)						(4,192)
Purchase of treasury stock	(80,543)				(80,543)
Stock Issued During Period RSAs and SARs	0		(17,966)		17,966
Stock-based compensation	8,451		8,451
Cash dividends per share, Common Stock, Cash	(70,100)			(70,100)
Balance at Jun. 30, 2024	$ 3,158,335	655,322	3,153,107	235,299	(98,176)	(807,817)	20,600
Common Stock, Dividends, Per Share, Cash Paid	$ 0.540
Balance at Mar. 31, 2024	$ 2,963,889	655,322	3,148,649	130,706	(59,674)	(931,027)	19,913
Net income	141,442			139,553			1,889
Other comprehensive income (loss)	123,210					123,210
Distributions to non-controlling interest	(1,202)						(1,202)
Purchase of treasury stock	(38,229)				(38,229)
Stock Issued During Period RSAs and SARs	0		273		(273)
Stock-based compensation	4,185		4,185
Cash dividends per share, Common Stock, Cash	(34,960)			(34,960)
Balance at Jun. 30, 2024	$ 3,158,335	$ 655,322	$ 3,153,107	$ 235,299	$ (98,176)	$ (807,817)	$ 20,600
Common Stock, Dividends, Per Share, Cash Paid	$ 0.270