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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

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