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Commitments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Commitments to extend credit    
Schedule of Commitments [Line Items]    
Off-balance sheet financial instruments, contractual amounts $ 3,113,966 $ 2,481,173
Letters of credit    
Schedule of Commitments [Line Items]    
Off-balance sheet financial instruments, contractual amounts $ 68,544 77,314
Letters of credit | Minimum    
Schedule of Commitments [Line Items]    
Remaining term 1 month  
Letters of credit | Maximum    
Schedule of Commitments [Line Items]    
Remaining term 11 years  
State tax credits, held for sale    
Schedule of Commitments [Line Items]    
Off-balance sheet financial instruments, contractual amounts $ 4,075 18,118
SBIC Capital Commitments [Domain]    
Schedule of Commitments [Line Items]    
Off-balance sheet financial instruments, contractual amounts 35,090 21,553
Unadvanced Commitment on Impaired Loan    
Schedule of Commitments [Line Items]    
Estimated losses attributable to unadvanced commitments on impaired loans 12,100  
Fixed Rate Loan Commitment | Commitments to extend credit    
Schedule of Commitments [Line Items]    
Off-balance sheet financial instruments, contractual amounts $ 246,500 $ 238,700