Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]	Treasury Stock, Common
Balance at Dec. 31, 2022	$ 3,137,228	$ 145,452	$ 643	$ 1,029,756	$ 3,309,671	$ (1,348,294)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	597,973				597,973
Other comprehensive income, net of tax	229,075					229,075
Proceeds from stock option exercises/stock unit conversions (344,237 shares, 589,782 shares, and 267,357 shares during 2025, 2024, and 2023, respectively)	9,299		1	1,463	(10,958)		18,793
Stock-based compensation expense recognized in earnings	24,590			24,590
Purchase of treasury stock (1,254,481 shares, 577,637 shares, and 436,765 shares during 2025, 2024, and 2023, respectively)	(42,720)						(42,720)
Cash dividends paid on preferred stock (approximately $44.50 per share which is equivalent to approximately $1.11 per depositary share in 2025, 2024, and 2023)	(6,675)				(6,675)
Cash dividends – common stock ($3.95 per share, $3.74 per share, and $3.58 per share in 2025, 2024, and 2023, respectively)	(232,323)				(232,323)
Balance at Dec. 31, 2023	3,716,447	145,452	644	1,055,809	3,657,688	(1,119,219)	(23,927)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	582,542				582,542
Other comprehensive income, net of tax	(132,785)					(132,785)
Proceeds from stock option exercises/stock unit conversions (344,237 shares, 589,782 shares, and 267,357 shares during 2025, 2024, and 2023, respectively)	22,643				(39,627)		62,270
Stock-based compensation expense recognized in earnings	19,763			19,763
Purchase of treasury stock (1,254,481 shares, 577,637 shares, and 436,765 shares during 2025, 2024, and 2023, respectively)	(60,901)						(60,901)
Cash dividends paid on preferred stock (approximately $44.50 per share which is equivalent to approximately $1.11 per depositary share in 2025, 2024, and 2023)	(6,675)				(6,675)
Cash dividends – common stock ($3.95 per share, $3.74 per share, and $3.58 per share in 2025, 2024, and 2023, respectively)	(242,446)				(242,446)
Balance at Dec. 31, 2024	3,898,588	145,452	644	1,075,572	3,951,482	(1,252,004)	(22,558)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	648,557				648,557
Other comprehensive income, net of tax	409,053					409,053
Proceeds from stock option exercises/stock unit conversions (344,237 shares, 589,782 shares, and 267,357 shares during 2025, 2024, and 2023, respectively)	11,946				(28,837)		40,783
Stock-based compensation expense recognized in earnings	24,755			24,755
Purchase of treasury stock (1,254,481 shares, 577,637 shares, and 436,765 shares during 2025, 2024, and 2023, respectively)	(157,832)						(157,832)
Cash dividends paid on preferred stock (approximately $44.50 per share which is equivalent to approximately $1.11 per depositary share in 2025, 2024, and 2023)	(6,675)				(6,675)
Cash dividends – common stock ($3.95 per share, $3.74 per share, and $3.58 per share in 2025, 2024, and 2023, respectively)	(255,356)				(255,356)
Balance at Dec. 31, 2025	$ 4,573,036	$ 145,452	$ 644	$ 1,100,327	$ 4,309,171	$ (842,951)	$ (139,607)