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Commitments and Contingencies - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Commitment and Contingencies          
Provision for (release of) credit losses - unfunded commitments $ 355,000 $ (2,374,000) $ (517,000) $ (2,597,000)  
Unfunded loan commitment          
Commitment and Contingencies          
Provision for (release of) credit losses - unfunded commitments     2,700,000   $ 3,200,000
Standby letters          
Commitment and Contingencies          
Loss contingency accrual $ 5,600,000   $ 5,600,000   $ 6,000,000