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Loans Receivable and Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]      
Loans held for sale, at lower of cost or fair value $ 86,905 $ 14,491  
Financing Receivable, Allowance for Credit Loss, Recovery 6,288 4,521 $ 5,162
Allowance for credit loss, writeoff $ 35,317 31,088 37,520
Reversion period 1 year    
Reasonable and supportable period at which point loss assumptions revert back to historical loss information 2 years    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 3,300 2,700  
Reserves for unfunded commitments, expense (reversal) 610 (1,100)  
Retained earnings 1,172,394 1,181,533  
Accrued interest receivable 43,500 43,000  
CRE loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Financing Receivable, Allowance for Credit Loss, Recovery 3,905 563 3,285
Allowance for credit loss, writeoff 1,561 1,108 2,947
C&I loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Financing Receivable, Allowance for Credit Loss, Recovery 2,308 3,796 1,815
Allowance for credit loss, writeoff 32,669 29,662 $ 34,203
Substandard      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Loans held for sale, at lower of cost or fair value 82,900 13,800  
Residential mortgage loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Loans held for sale, at lower of cost or fair value 4,000 $ 646  
Cumulative Effect, Period of Adoption, Adjustment      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Retained earnings $ 1,100