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Loans - Summary of Average of Impaired Loans and Related Interest Income by Loan Portfolio Class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	$ 3,144	$ 2,236	$ 3,616	$ 1,414
Impaired Loans with Allowance: Interest Income	0	0	20	0
Impaired Loans with No Allowance: Average Recorded Investment	6,838	7,394	6,892	7,472
Impaired Loans with No Allowance: Interest Income	46	45	140	167
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	1,833	26	2,109	44
Impaired Loans with Allowance: Interest Income	0	0	0	0
Impaired Loans with No Allowance: Average Recorded Investment	11	23	5	12
Impaired Loans with No Allowance: Interest Income	0	0	0	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	1,311	2,210	1,507	1,370
Impaired Loans with Allowance: Interest Income	0	0	20	0
Impaired Loans with No Allowance: Average Recorded Investment	6,654	6,075	6,685	6,707
Impaired Loans with No Allowance: Interest Income	46	42	140	157
Commercial real estate construction
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	0	0	0	0
Impaired Loans with Allowance: Interest Income	0	0	0	0
Impaired Loans with No Allowance: Average Recorded Investment	123	1,173	126	586
Impaired Loans with No Allowance: Interest Income	0	0	0	0
Residential mortgage
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	0	0	0	0
Impaired Loans with Allowance: Interest Income	0	0	0	0
Impaired Loans with No Allowance: Average Recorded Investment	50	101	76	118
Impaired Loans with No Allowance: Interest Income	0	0	0	7
Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	0	0	0	0
Impaired Loans with Allowance: Interest Income	0	0	0	0
Impaired Loans with No Allowance: Average Recorded Investment	0	22	0	49
Impaired Loans with No Allowance: Interest Income	$ 0	$ 3	$ 0	$ 3

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.

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Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

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Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.

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