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Loans, Allowance for Credit Losses and Credit Quality - Additional Information (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Schedule Of Loans Allowance For Loan Losses And Credit Quality [Line Items] |  |  |
Carrying value of loans pledged | $ 1,177,543,000 |  | $ 1,136,449,000
Interest income recognized on nonaccrual loans | 39,000 | $ 15,000 |
Loan restructurings | 0 | $ 0 |
FHLBB | Loans Pledged |  |  |
Schedule Of Loans Allowance For Loan Losses And Credit Quality [Line Items] |  |  |
Carrying value of loans pledged | 731,200,000 |  | 744,600,000
Commercial And Industrial Loans |  |  |
Schedule Of Loans Allowance For Loan Losses And Credit Quality [Line Items] |  |  |
Threshold limit for loans receivable | 500,000 |  |
Commercial Real Estate Loans |  |  |
Schedule Of Loans Allowance For Loan Losses And Credit Quality [Line Items] |  |  |
Threshold limit for loans receivable | 2,000,000 |  |
Residential Real Estate |  |  |
Schedule Of Loans Allowance For Loan Losses And Credit Quality [Line Items] |  |  |
Mortgage loans in process of foreclosure | $ 107,000 |  | $ 335,000

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- Definition Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481746/310-40-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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