Loans and Allowance for Credit Losses (Schedule of Collateral Dependent Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
C&I
Financing Receivable, Impaired [Line Items]
Amortized Cost	$ 8,681,166	$ 9,029,475
Franchise and equipment finance
Financing Receivable, Impaired [Line Items]
Amortized Cost	71,740	102,746
1-4 single family residential
Financing Receivable, Impaired [Line Items]
Amortized Cost	5,807,912	6,091,959
Secured Debt
Financing Receivable, Impaired [Line Items]
Amortized Cost	182,618	285,232
Extent to Which Secured by Collateral	138,746	256,943
Secured Debt \| CRE
Financing Receivable, Impaired [Line Items]
Amortized Cost	36,239	112,494
Secured Debt \| Commercial Real Estate \| CRE
Financing Receivable, Impaired [Line Items]
Extent to Which Secured by Collateral	35,615	112,071
Secured Debt \| C&I
Financing Receivable, Impaired [Line Items]
Amortized Cost	145,344	170,222
Secured Debt \| C&I \| Commercial and industrial
Financing Receivable, Impaired [Line Items]
Extent to Which Secured by Collateral	102,096	142,356
Secured Debt \| Franchise and equipment finance
Financing Receivable, Impaired [Line Items]
Amortized Cost	1,035	2,516
Secured Debt \| Franchise and equipment finance \| Franchise and equipment finance
Financing Receivable, Impaired [Line Items]
Extent to Which Secured by Collateral	$ 1,035	$ 2,516