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Allowance for Credit Losses - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]      
Allowance for credit loss, increase   $ 22.5  
Allowance for credit loss, increase, percent   26.90%  
Allowance for credit loss, percent of total loans 1.48% 1.48% 1.20%
Additional reserve requirements for charge-offs and credit quality $ 15.7 $ 23.2  
Account for loan growth 1.4 3.6  
Updated economic factors 12.0 14.0  
Commercial Real Estate And Commercial Portfolio Segments Member      
Financing Receivable, Credit Quality Indicator [Line Items]      
Internal risk ratings, loan balance, minimum   3.0  
Real estate loans | Single-family residential      
Financing Receivable, Credit Quality Indicator [Line Items]      
Internal risk ratings, loan balance, minimum   $ 3.0  
Real estate loans | Owner occupied | Commercial Real Estate | Collateralized Loan Obligations      
Financing Receivable, Credit Quality Indicator [Line Items]      
Decrease in weighted-average loan-to-values   4.00%  
Real estate loans | Multi-family residential      
Financing Receivable, Credit Quality Indicator [Line Items]      
Additional reserve requirements for charge-offs and credit quality $ 8.6