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Loans, Allowance for Credit Losses and Credit Quality - Amortized Cost of Loan Modifications (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 32,206 | $ 12,507
Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | 23,744 | 2,645
Other-Than-Insignificant Payment Delay |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | 8,160 | 9,818
Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | 251 | 44
Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Modified, Accumulated | 51 | 0
Commercial Real Estate [Member] | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 3,375 | $ 2,540
% of Total Class of Financing Receivable | 0.04% | 0.03%
Added weighted-average contractual term to the life of the loan | 6 months | 2 months
Commercial Real Estate [Member] | Other-Than-Insignificant Payment Delay |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 6,351 | $ 7,013
% of Total Class of Financing Receivable | 0.08% | 0.09%
Small Business [Member] | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 0 | $ 105
% of Total Class of Financing Receivable | 0.00% | 0.05%
Added weighted-average contractual term to the life of the loan |  | 4 years 3 months 18 days
Small Business [Member] | Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 0 | $ 44
% of Total Class of Financing Receivable | 0.00% | 0.02%
Small Business [Member] | Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of Total Class of Financing Receivable | 0.02% | 0.00%
Financing Receivable, Modified, Accumulated | $ 51 | $ 0
Small Business [Member] | Combination - Interest Rate Reduction and Term Extension | Maximum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 11.00% | 10.00%
Small Business [Member] | Combination - Interest Rate Reduction and Term Extension | Minimum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 8.20% | 6.50%
Commercial And Industrial [Member] | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 9,725 | $ 0
% of Total Class of Financing Receivable | 0.62% | 0.00%
Added weighted-average contractual term to the life of the loan | 3 months |
Commercial And Industrial [Member] | Other-Than-Insignificant Payment Delay |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 1,809 | $ 2,805
% of Total Class of Financing Receivable | 0.11% | 0.17%
Commercial And Industrial [Member] | Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of Total Class of Financing Receivable | 0.01% | 0.00%
Financing Receivable, Modified, Accumulated | $ 179 | $ 0
Added weighted-average contractual term to the life of the loan | 1 year 6 months |
Commercial And Industrial [Member] | Combination - Interest Rate Reduction and Term Extension | Maximum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 10.10% |
Commercial And Industrial [Member] | Combination - Interest Rate Reduction and Term Extension | Minimum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 7.20% |
Construction Loans [Member] | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost Basis | $ 10,644 | $ 0
% of Total Class of Financing Receivable | 1.28% | 0.00%
Home Equity Loan [Member] | Combination - Interest Rate Reduction and Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Added weighted-average contractual term to the life of the loan | 8 years 1 month 6 days |
Home Equity Loan [Member] | Combination - Interest Rate Reduction and Term Extension | Maximum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 10.00% |
Home Equity Loan [Member] | Combination - Interest Rate Reduction and Term Extension | Minimum [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Reduced weighted-average contractual interest rate | 6.80% |
Home Equity Loan [Member] | Extended Maturity and Principal Forgiveness |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of Total Class of Financing Receivable | 0.01% | 0.00%
Financing Receivable, Modified, Accumulated | $ 72 | $ 0

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