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Loans, Lease Receivables, and Allowance for Credit Losses - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Recorded Investment          
Guaranteed portion of SBA loans sold to third parties $ 4,600,000 $ 10,700,000 $ 10,300,000 $ 20,500,000  
Amount of outstanding SBA loans sold 74,600,000   74,600,000   $ 84,200,000
Loans and leases transferred to third parties principal amount 31,400,000 $ 39,200,000 90,000,000 93,900,000  
Gain (loss) recognized on participation interest in originated loans     0    
Amount of loan participation purchased 2,200,000   2,200,000   0
Amount of outstanding loans transferred to third parties as loan participations 332,000,000   332,000,000   279,500,000
Amount of partial ownership in loan participations transferred 390,100,000   390,100,000   367,400,000
Loans in the participation sold portfolio, considered impaired, gross amount $ 0   0   $ 0
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount     8,225,000 716,000  
Commercial and Industrial          
Financing Receivable, Recorded Investment          
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount     2,324,000 716,000  
Commercial Real Estate          
Financing Receivable, Recorded Investment          
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount     $ 5,901,000 $ 0