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Loans and Leases - Narrative (Details) - USD ($)
$ in Millions
Mar. 27, 2023
Mar. 31, 2023
Dec. 31, 2022
Receivables [Abstract]      
Financing receivable, accrued interest receivable   $ 643.0 $ 203.0
Financing receivable, threshold period past due   30 days  
Other real estate owned   $ 47.0  
Financing receivable, troubled debt restructuring, commitment to lend     $ 1.5
SVB      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Purchase accounting adjustment of discount $ 2,270.0    
SVB | FDIC Credit Facility      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Debt instrument, term 5 years    
FDIC advances, maximum amount available $ 70,000.0    
SVB | Non-PCD      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and leases acquired, FV $ 66,470.0