Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock [Member]	Common Stock	Capital Surplus	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-Controlling Interest
Beginning Balance at Dec. 31, 2018	$ 2,937,149			$ 144,784	$ 559,432	$ 2,084,824	$ 241,163			$ (34,236)	$ (64,669)	$ 5,851
Net income	422,712						421,231					1,481
Other comprehensive income	175,113										175,113
Distributions to non-controlling interest	(3,544)											(3,544)
Purchase of treasury stock	(134,904)									(134,904)
Accelerated share repurchase	(150,000)									(150,000)
Cash dividends paid on common stock	(113,466)						(113,466)
Cash dividends paid on preferred stock	(9,000)						(9,000)
Stock-based compensation	13,854					13,854
Stock Issued During Period RSAs and SARs	1,351					(19,293)				20,644
Dividends, Common Stock, Stock	(793)				4,546	72,079	(338,366)			260,948
Balance at Dec. 31, 2019	3,138,472		$ 3,142,238	144,784	563,978	2,151,464	201,562		$ 205,328	(37,548)	110,444	3,788
Balance (Accounting Standards Update 2016-13) at Dec. 31, 2019		$ 3,766						$ 3,766
Net income	353,885						354,057					(172)
Other comprehensive income	220,933										220,933
Distributions to non-controlling interest	(691)											(691)
Stock Redeemed or Called During Period, Value	(150,000)			(144,784)			(5,216)
Purchase of treasury stock	(54,163)									(54,163)
Cash dividends paid on common stock	(120,818)						(120,818)
Cash dividends paid on preferred stock	(6,750)						(6,750)
Stock-based compensation	14,915					14,915
Stock Issued During Period RSAs and SARs	1,309					(24,271)				25,580
Dividends, Common Stock, Stock	(886)				25,374	294,180	(353,601)			33,161
Balance at Dec. 31, 2020	3,399,972			0	589,352	2,436,288	73,000			(32,970)	331,377	2,925
Net income	540,590						530,765					9,825
Other comprehensive income	(254,297)										(254,297)
Distributions to non-controlling interest	(1,065)											(1,065)
Purchase of treasury stock	(129,361)									(129,361)
Sale of non-controlling interest in subsidiary	0					659						(659)
Cash dividends paid on common stock	(122,693)						(122,693)
Stock-based compensation	15,415					15,415
Stock Issued During Period RSAs and SARs	911					(21,799)				22,710
Dividends, Common Stock, Stock	(1,148)				21,452	259,331	(388,579)			106,648
Balance at Dec. 31, 2021	$ 3,448,324			$ 0	$ 610,804	$ 2,689,894	$ 92,493			$ (32,973)	$ 77,080	$ 11,026