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Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($) loan	Jun. 30, 2020 USD ($) loan	Dec. 31, 2020 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	72	78	74
Balance	$ 10,782	$ 14,013	$ 11,534
Specific Reserves	$ 660	$ 543	$ 369
Commercial |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	13	16	13
Balance	$ 2,490	$ 4,585	$ 2,558
Specific Reserves	$ 166	$ 194	$ 106
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	2	1	1
Balance	$ 762	$ 701	$ 681
Specific Reserves	$ 19	$ 20	$ 18
Commercial |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	7	7	6
Balance	$ 956	$ 777	$ 717
Specific Reserves	$ 357	$ 131	$ 96
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential |    Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	48	51	51
Balance	$ 6,546	$ 7,477	$ 7,384
Specific Reserves	$ 118	$ 198	$ 149
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	3	2
Balance	$ 22	$ 473	$ 186
Specific Reserves	$ 0	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	0	1
Balance	$ 6	$ 0	$ 8
Specific Reserves	$ 0	$ 0	$ 0

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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-Topic 310
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-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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