Parent Company Only Financial Information, Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and Due from Banks	$ 574,698	$ 544,059
Interest-Bearing Deposits in Banks and Other Financial Institutions	1,144,123	453,590
Other Assets	657,645	676,987
Assets	45,202,596	43,023,068
Liabilities and Equity [Abstract]
Senior Notes	300,000	300,000
Subordinated Debt	300,000	550,000
Long-Term Debt, Total	1,007,120
Other Liabilities	463,131	568,485
Liabilities, Total	40,227,249	38,417,506
Preferred Stock, Including Additional Paid in Capital	194,112	194,112
Common Stock, Value, Issued	1,890	1,890
Equity, Attributable to Parent, Total	4,975,347	4,605,562	$ 4,173,973	$ 4,015,490
Liabilities and Equity	45,202,596	43,023,068
Parent Company Only
Assets [Abstract]
Cash and Due from Banks	32,616	36,158
Interest-Bearing Deposits in Banks and Other Financial Institutions	50,325	212,943
Financing Receivable, after Allowance for Credit Loss, Noncurrent	653,411	710,126
Investments in and Receivable Due from Subsidiaries	4,802,649	4,455,525
Other Assets	60,431	57,649
Assets	5,599,432	5,472,402
Liabilities and Equity [Abstract]
Senior Notes	300,000	300,000
Subordinated Debt	300,000	550,000
Other Long-term Debt and Capitalized Costs	(5,724)	(12,660)
Long-Term Debt, Total	594,276	837,340
Other Liabilities	29,809	29,500
Liabilities, Total	624,085	866,841
Preferred Stock, Including Additional Paid in Capital	194,112	194,112
Common Stock, Value, Issued	4,781,235	4,411,450
Equity, Attributable to Parent, Total	4,975,347	4,605,562
Liabilities and Equity	$ 5,599,432	$ 5,472,402