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, 2021	$ 3,448,324	$ 610,804	$ 2,689,894	$ 92,493	$ (32,973)	$ 77,080	$ 11,026
Net income	240,179			233,948			6,231
Other comprehensive income (loss)	(843,974)					(843,974)
Distributions to non-controlling interest	(790)						(790)
Purchase of treasury stock	(113,205)				(113,205)
Stock Issued During Period RSAs and SARs	448		(16,142)		16,590
Stock-based compensation	8,409		8,409
Cash dividends per share, Common Stock, Cash	(64,078)			(64,078)
Balance at Jun. 30, 2022	2,675,313	610,804	2,682,161	262,363	(129,588)	(766,894)	16,467
Balance at Mar. 31, 2022	2,973,402	610,804	2,678,025	178,504	(72,293)	(434,400)	12,762
Net income	120,153			115,794			4,359
Other comprehensive income (loss)	(332,494)					(332,494)
Distributions to non-controlling interest	(654)						(654)
Purchase of treasury stock	(57,350)				(57,350)
Stock Issued During Period RSAs and SARs	0		(55)		55
Stock-based compensation	4,191		4,191
Cash dividends per share, Common Stock, Cash	(31,935)			(31,935)
Balance at Jun. 30, 2022	2,675,313	610,804	2,682,161	262,363	(129,588)	(766,894)	16,467
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
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