Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common
Total shareholders’ equity at beginning of period at Dec. 31, 2024	$ 3,898,588	$ 145,452	$ 644	$ 1,075,572	$ 3,951,482	$ (1,252,004)	$ (22,558)
Net income	307,925				307,925
Other comprehensive income (loss)	111,532					111,532
Stock option exercises/stock unit conversions	5,956				(9,593)		15,549
Stock compensation expense recognized in earnings	8,913			8,913
Purchase of treasury stock	(2,676)						(2,676)
Cash dividends – preferred stock	(3,338)				(3,338)
Cash dividends – common stock	(126,590)				(126,590)
Total shareholders’ equity at end of period at Jun. 30, 2025	4,200,310	145,452	644	1,084,485	4,119,886	(1,140,472)	(9,685)
Total shareholders’ equity at beginning of period at Mar. 31, 2025	4,114,160	145,452	644	1,079,653	4,031,422	(1,129,211)	(13,800)
Net income	157,003				157,003
Other comprehensive income (loss)	(11,261)					(11,261)
Stock option exercises/stock unit conversions	2,248				(1,943)		4,191
Stock compensation expense recognized in earnings	4,832			4,832
Purchase of treasury stock	(76)						(76)
Cash dividends – preferred stock	(1,669)				(1,669)
Cash dividends – common stock	(64,927)				(64,927)
Total shareholders’ equity at end of period at Jun. 30, 2025	4,200,310	145,452	644	1,084,485	4,119,886	(1,140,472)	(9,685)
Total shareholders’ equity at beginning of period at Dec. 31, 2025	4,573,036	145,452	644	1,100,327	4,309,171	(842,951)	(139,607)
Net income	343,046				343,046
Other comprehensive income (loss)	(8,709)					(8,709)
Conversion of Stock, Amount Issued	0				(4,465)		4,465
Stock compensation expense recognized in earnings	10,584			10,584
Purchase of treasury stock	(163,193)						(163,193)
Cash dividends – preferred stock	(3,338)				(3,338)
Cash dividends – common stock	(128,783)				(128,783)
Total shareholders’ equity at end of period at Jun. 30, 2026	4,622,643	145,452	644	1,110,911	4,515,631	(851,660)	(298,335)
Total shareholders’ equity at beginning of period at Mar. 31, 2026	4,530,669	145,452	644	1,105,508	4,410,863	(923,511)	(208,287)
Net income	172,059				172,059
Other comprehensive income (loss)	71,851					71,851
Conversion of Stock, Amount Issued	0				(847)		847
Stock compensation expense recognized in earnings	5,403			5,403
Purchase of treasury stock	(90,895)						(90,895)
Cash dividends – preferred stock	(1,669)				(1,669)
Cash dividends – common stock	(64,775)				(64,775)
Total shareholders’ equity at end of period at Jun. 30, 2026	$ 4,622,643	$ 145,452	$ 644	$ 1,110,911	$ 4,515,631	$ (851,660)	$ (298,335)