Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock Series F Issued	Preferred Stock Series G Issued	Preferred Stock	Common Stock	Paid-In Capital	Retained Earnings	Retained Earnings Preferred Stock Series F Issued	Retained Earnings Preferred Stock Series G Issued	Treasury Stock, at cost	Accumulated Other Comprehensive (Loss), Net of Tax
Balance, beginning of period at Dec. 31, 2023	$ 8,689,996			$ 283,979	$ 1,828	$ 6,179,753	$ 3,282,530			$ (507,523)	$ (550,571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	397,956						397,956
Other comprehensive income (loss), net of tax	(77,328)										(77,328)
Common stock dividends and equivalents	(137,810)						(137,810)
Preferred stock dividends		$ (3,938)	$ (4,387)					$ (3,938)	$ (4,387)
Stock-based compensation	27,193					(26,467)				53,660
Common shares acquired from stock compensation plan activity	(16,619)									(16,619)
Common stock repurchase program	(65,795)									(65,795)
Balance, end of period at Jun. 30, 2024	8,809,268			283,979	1,828	6,153,286	3,534,351			(536,277)	(627,899)
Balance, beginning of period at Mar. 31, 2024	8,747,498			283,979	1,828	6,138,935	3,425,701			(486,844)	(616,101)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	181,633						181,633
Other comprehensive income (loss), net of tax	(11,798)										(11,798)
Common stock dividends and equivalents	(68,821)						(68,821)
Preferred stock dividends		(1,969)	(2,193)					(1,969)	(2,193)
Stock-based compensation	13,433					14,351				(918)
Common shares acquired from stock compensation plan activity	(3,123)									(3,123)
Common stock repurchase program	(45,392)									(45,392)
Balance, end of period at Jun. 30, 2024	8,809,268			283,979	1,828	6,153,286	3,534,351			(536,277)	(627,899)
Balance, beginning of period at Dec. 31, 2024	9,133,214			283,979	1,828	6,181,475	3,759,158			(536,843)	(556,383)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	485,765						485,765
Other comprehensive income (loss), net of tax	118,121										118,121
Common stock dividends and equivalents	(136,248)						(136,248)
Preferred stock dividends		(3,938)	(4,387)					(3,938)	(4,387)
Stock-based compensation	29,132					(26,343)				55,475
Common shares acquired from stock compensation plan activity	(22,190)									(22,190)
Common stock repurchase program	(261,852)									(261,852)
Balance, end of period at Jun. 30, 2025	9,337,617			283,979	1,828	6,155,132	4,100,350			(765,410)	(438,262)
Balance, beginning of period at Mar. 31, 2025	9,204,154			283,979	1,828	6,140,885	3,913,169			(686,306)	(449,401)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	258,848						258,848
Other comprehensive income (loss), net of tax	11,139										11,139
Common stock dividends and equivalents	(67,505)						(67,505)
Preferred stock dividends		$ (1,969)	$ (2,193)					$ (1,969)	$ (2,193)
Stock-based compensation	15,121					14,247				874
Common shares acquired from stock compensation plan activity	(408)									(408)
Common stock repurchase program	(79,570)									(79,570)
Balance, end of period at Jun. 30, 2025	$ 9,337,617			$ 283,979	$ 1,828	$ 6,155,132	$ 4,100,350			$ (765,410)	$ (438,262)