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Loans - Impaired Loans by Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	$ 4,359	$ 8,968	$ 12,098
Recorded Investment, With Related Allowance	1,801	3,084	3,941
Balance of impaired loans	6,160	12,052	16,039
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	4,942	10,453	13,806
Unpaid Principal Balance, With Related Allowance	1,906	3,307	4,036
Unpaid Principal Balance	6,848	13,760	17,842
Related Allowance	398	576	462
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	6,732	9,553	15,473
Average Recorded Investment, With Related Allowance	2,804	3,568	5,615
Average Recorded Investment	9,536	13,121	21,088
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	154	166	336
Recognized Interest Income, With Related Allowance	50	76	142
Recognized Interest Income	204	242	478
Commercial | Real estate
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	1,236	1,386	2,060
Recorded Investment, With Related Allowance	0	42	969
Balance of impaired loans	1,236	1,428	3,029
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	1,532	1,689	2,368
Unpaid Principal Balance, With Related Allowance	0	71	995
Unpaid Principal Balance	1,532	1,760	3,363
Related Allowance	0	42	112
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	1,440	1,590	4,123
Average Recorded Investment, With Related Allowance	11	614	1,018
Average Recorded Investment	1,451	2,204	5,141
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	50	63	127
Recognized Interest Income, With Related Allowance	0	0	43
Recognized Interest Income	50	63	170
Commercial | Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	685	28	89
Recorded Investment, With Related Allowance	0	661	681
Balance of impaired loans	685	689	770
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	687	28	89
Unpaid Principal Balance, With Related Allowance	0	661	681
Unpaid Principal Balance	687	689	770
Related Allowance	0	16	18
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	81	22	358
Average Recorded Investment, With Related Allowance	606	661	579
Average Recorded Investment	687	683	937
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	35	0	0
Recognized Interest Income, With Related Allowance	0	22	30
Recognized Interest Income	35	22	30
Commercial | Other
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	301	917	1,591
Recorded Investment, With Related Allowance	545	386	188
Balance of impaired loans	846	1,303	1,779
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	348	1,009	1,623
Unpaid Principal Balance, With Related Allowance	647	411	202
Unpaid Principal Balance	995	1,420	1,825
Related Allowance	298	381	169
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	408	1,051	999
Average Recorded Investment, With Related Allowance	693	396	1,193
Average Recorded Investment	1,101	1,447	2,192
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	13	15	15
Recognized Interest Income, With Related Allowance	0	0	3
Recognized Interest Income	13	15	18
Municipal
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	0	0	0
Recorded Investment, With Related Allowance	0	0	0
Balance of impaired loans	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	0	0	0
Unpaid Principal Balance, With Related Allowance	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	0	0	0
Average Recorded Investment, With Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	0	0	0
Recognized Interest Income, With Related Allowance	0	0	0
Recognized Interest Income	0	0	0
Residential | Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	0	0	0
Recorded Investment, With Related Allowance	0	0	0
Balance of impaired loans	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	0	0	0
Unpaid Principal Balance, With Related Allowance	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	0	0	0
Average Recorded Investment, With Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	0	0	0
Recognized Interest Income, With Related Allowance	0	0	0
Recognized Interest Income	0	0	0
Residential | Term
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	1,833	6,178	7,335
Recorded Investment, With Related Allowance	1,256	1,995	2,079
Balance of impaired loans	3,089	8,173	9,414
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	2,035	7,238	8,629
Unpaid Principal Balance, With Related Allowance	1,259	2,164	2,134
Unpaid Principal Balance	3,294	9,402	10,763
Related Allowance	100	137	163
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	4,507	6,429	8,773
Average Recorded Investment, With Related Allowance	1,486	1,897	2,073
Average Recorded Investment	5,993	8,326	10,846
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	56	87	193
Recognized Interest Income, With Related Allowance	50	54	65
Recognized Interest Income	106	141	258
Home equity line of credit
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	304	457	1,015
Recorded Investment, With Related Allowance	0	0	24
Balance of impaired loans	304	457	1,039
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	340	487	1,089
Unpaid Principal Balance, With Related Allowance	0	0	24
Unpaid Principal Balance	340	487	1,113
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	295	461	1,219
Average Recorded Investment, With Related Allowance	8	0	744
Average Recorded Investment	303	461	1,963
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	0	0	0
Recognized Interest Income, With Related Allowance	0	0	1
Recognized Interest Income	0	0	1
Consumer
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, No Related Allowance	0	2	8
Recorded Investment, With Related Allowance	0	0	0
Balance of impaired loans	0	2	8
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, No Related Allowance	0	2	8
Unpaid Principal Balance, With Related Allowance	0	0	0
Unpaid Principal Balance	0	2	8
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, No Related Allowance	1	0	1
Average Recorded Investment, With Related Allowance	0	0	8
Average Recorded Investment	1	0	9
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized Interest Income, No Related Allowance	0	1	1
Recognized Interest Income, With Related Allowance	0	0	0
Recognized Interest Income	$ 0	$ 1	$ 1

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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