Allowance for Loan Losses and Credit Quality - Allocation of Investment in Loans, by Impairment Methodology (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	$ 6,530	$ 6,776
Collectively evaluated for impairment	821,077	780,274
Total	827,607	787,050
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	1,728	1,750
Collectively evaluated for impairment	280,934	245,077
Total	282,662	246,827
Construction real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	193	198
Collectively evaluated for impairment	68,537	64,951
Total	68,730	65,149
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	4,601	4,819
Collectively evaluated for impairment	343,777	339,997
Total	348,378	344,816
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	8	9
Collectively evaluated for impairment	44,800	49,779
Total	44,808	49,788
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,241	2,376
Total	2,241	2,376
Municipal
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	80,788	78,094
Total	$ 80,788	$ 78,094

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The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 45
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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The balance of financing receivables that were individually evaluated for impairment.

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