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Loans - Pre-Modification and Post-Modification Outstanding Recorded Investment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	2	3	10
Pre-Modification Outstanding Recorded Investment	$ 10	$ 317	$ 245	$ 1,108
Post-Modification Outstanding Recorded Investment	10	276	197	977
Specific Reserves	$ 1	$ 0	$ 24	$ 168
Commercial |    Real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 110
Post-Modification Outstanding Recorded Investment	0	0	0	95
Specific Reserves	$ 0	$ 0	$ 0	$ 95
Commercial |    Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Commercial |    Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Municipal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Residential |    Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Residential |    Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	2	2	8
Pre-Modification Outstanding Recorded Investment	$ 0	$ 317	$ 235	$ 998
Post-Modification Outstanding Recorded Investment	0	276	187	882
Specific Reserves	$ 0	$ 0	$ 23	$ 73
Home equity line of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0	1	0
Pre-Modification Outstanding Recorded Investment	$ 10	$ 0	$ 10	$ 0
Post-Modification Outstanding Recorded Investment	10	0	10	0
Specific Reserves	$ 1	$ 0	$ 1	$ 0

X

- Definition

The number of financing receivables that have been modified by troubled debt restructurings during the current period.

+ References

No definition available.

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- Definition

Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings during the period.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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