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Loans - Narrative (Details) $ in Thousands | Mar. 31, 2025 USD ($) loan | Dec. 31, 2024 USD ($) loan | Mar. 31, 2024 USD ($) loan
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Net deferred loan costs | $ 12,570 | $ 12,457 | $ 11,745
Loans used to collateralize borrowings from the Federal Home Loan Bank of Boston | 631,410 | 626,851 | 565,047
Loans | $ 2,383,150 | $ 2,340,940 | $ 2,173,746
Number of mortgage loans in the process of foreclosure | loan | 4 | 3 | 4
Mortgage loans in the process of foreclosure | $ 1,208 | $ 192 | $ 510
Asset Pledged as Collateral |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 411,257 | 392,562 | 322,124
Interest rate swap agreements | Designated as Hedging Instrument |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loan adjustments | (1,016) | (560) | 618
Interest rate swap agreements | Fair Value Hedging | Designated as Hedging Instrument |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loan adjustments | $ (1,120) | $ (758) | $ (313)

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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
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- Definition Amount of fee received for commitment to originate or purchase financing receivable where likelihood of commitment being exercised is remote, to be recognized as service income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481598/310-20-45-2 + Details
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