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Loans, Allowance for Credit Losses and Credit Quality - Amortized Cost of Loan Modifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 42,637 | $ 45,757 | $ 75,427 | $ 59,653
Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | 6,016 | 45,656 | 14,770 | 51,124
Contractual Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  | 65 |  | 112
Extended Maturity and Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | 13,337 | 36 | 26,371 | 258
Other-Than Insignificant Payment Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | 1,036 |  | 12,038 | 8,159
Term Extension and OtherThan Insignificant Payment Delays |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  |  | 22,248 |
Term Extension and Other-Than Insignificant Payment Delay [Domain] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | 22,248 |  |  |
Commercial And Industrial [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 3,879 | $ 12,667 | $ 8,986 | $ 12,670
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.12% | 0.42% | 0.28% | 0.42%
Added weighted-average contractual term to the life of the loan | 1 year | 2 years 3 months 18 days | 11 months | 2 years 3 months 18 days
Commercial And Industrial [Member] | Extended Maturity and Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 93 |  | $ 93 | $ 152
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.00% |  | 0.00% | 0.01%
Added weighted-average contractual term to the life of the loan | 5 years |  | 5 years | 1 year 6 months
Commercial And Industrial [Member] | Extended Maturity and Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  |  | 9.50% | 10.10%
Commercial And Industrial [Member] | Extended Maturity and Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 6.69% |  | 6.69% | 7.20%
Commercial And Industrial [Member] | Other-Than Insignificant Payment Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 1,036 |  | $ 1,036 | $ 8,159
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.03% |  | 0.03% | 0.27%
Commercial Real Estate [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 1,653 | $ 28,239 | $ 5,028 | $ 31,614
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.03% | 0.42% | 0.08% | 0.47%
Added weighted-average contractual term to the life of the loan |  | 5 months | 5 months | 5 months
Commercial Real Estate [Member] | Extended Maturity and Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 13,015 |  | $ 25,093 |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.20% |  | 0.38% |
Added weighted-average contractual term to the life of the loan | 3 years |  | 3 years 8 months 12 days |
Commercial Real Estate [Member] | Extended Maturity and Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 7.70% |  | 7.85% |
Commercial Real Estate [Member] | Extended Maturity and Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 6.25% |  | 6.83% |
Commercial Real Estate [Member] | Other-Than Insignificant Payment Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  |  | $ 11,002 |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  |  | 0.17% |
Commercial Real Estate [Member] | Term Extension and OtherThan Insignificant Payment Delays |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  |  | $ 22,248 |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  |  | 0.34% |
Commercial Real Estate [Member] | Term Extension and OtherThan Insignificant Payment Delays | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 5.91% |  | 5.91% |
Commercial Real Estate [Member] | Term Extension and OtherThan Insignificant Payment Delays | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 5.50% |  | 5.50% |
Commercial Real Estate [Member] | Term Extension and Other-Than Insignificant Payment Delay [Domain] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 22,248 |  |  |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.34% |  |  |
Construction Loans [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  | $ 4,452 |  | $ 6,542
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  | 0.57% |  | 0.83%
Added weighted-average contractual term to the life of the loan | 3 months | 12 months |  | 10 months
Residential Real Estate [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  | $ 298 | $ 272 | $ 298
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  | 0.01% | 0.01% | 0.01%
Added weighted-average contractual term to the life of the loan |  | 6 years 2 months 12 days | 17 years 9 months 18 days | 6 years 2 months 12 days
Home Equity Loan [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 245 |  | $ 245 |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.02% |  | 0.02% |
Added weighted-average contractual term to the life of the loan | 5 years 2 months 12 days |  | 5 years 2 months 12 days |
Home Equity Loan [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  | $ 65 |  | $ 65
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  | 0.01% |  | 0.01%
Home Equity Loan [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  | 7.99% |  | 7.99%
Home Equity Loan [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  | 7.00% |  | 7.00%
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 229 |  | $ 1,185 | $ 70
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.02% |  | 0.10% | 0.01%
Added weighted-average contractual term to the life of the loan | 17 years 6 months |  | 23 years 7 months 6 days | 8 years 1 month 6 days
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 7.24% |  | 7.25% | 10.00%
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate | 6.88% |  | 6.88% | 6.80%
Small Business [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount | $ 239 |  | $ 239 |
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage | 0.08% |  | 0.08% |
Added weighted-average contractual term to the life of the loan | 5 years 2 months 12 days |  | 5 years 2 months 12 days |
Small Business [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  |  |  | $ 47
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  |  |  | 0.02%
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  | 10.25% |  | 11.00%
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  | 6.50% |  | 8.20%
Small Business [Member] | Extended Maturity and Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Financing Receivable, Modified in Period, Amount |  | $ 36 |  | $ 36
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage |  | 0.01% |  | 0.01%
Added weighted-average contractual term to the life of the loan |  | 2 years 6 months |  | 2 years 6 months
Small Business [Member] | Extended Maturity and Interest Rate Reduction [Member] | Maximum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  |  |  | 10.25%
Small Business [Member] | Extended Maturity and Interest Rate Reduction [Member] | Minimum [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Reduced weighted-average contractual interest rate |  |  |  | 6.50%

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