Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 523,521	$ 730,646	$ 523,521	$ 730,646	$ 899,034
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	826,878	695,363	826,878	695,363	628,578
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	542,761	636,937	542,761	636,937	429,480
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	362,766	236,251	362,766	236,251	224,846
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	178,279	154,837	178,279	154,837	191,012
Prior	582,392	331,337	582,392	331,337	483,884
Revolving Loans Amortized Cost Basis	122,020	139,423	122,020	139,423	126,373
Revolving Loan Converted to Term	0	0	0	0	0
Total	3,138,617	2,924,794	3,138,617	2,924,794	2,983,207
Total Loans	3,107,505	2,895,562	3,107,505	2,895,562	2,953,255
Current-period gross charge-offs
Total	1,204	1,147	3,812	2,883
Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	37,300	34,589	37,300	34,589	42,038
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	36,456	35,080	36,456	35,080	28,718
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	23,602	27,133	23,602	27,133	17,125
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	10,750	7,999	10,750	7,999	8,335
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	4,825	9,605	4,825	9,605	8,129
Prior	24,704	11,266	24,704	11,266	23,873
Revolving Loans Amortized Cost Basis	10,429	13,301	10,429	13,301	12,075
Revolving Loan Converted to Term	0	0	0	0	0
Total	148,066	138,973	148,066	138,973	140,293
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			0
Prior			0
Revolving Loans Amortized Cost Basis
Revolving Loan Converted to Term
Total			0
Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	57,761	125,881	57,761	125,881	163,143
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	170,163	141,029	170,163	141,029	115,111
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	107,813	262,105	107,813	262,105	127,618
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	124,558	42,092	124,558	42,092	44,459
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	42,624	35,075	42,624	35,075	69,073
Prior	229,151	69,762	229,151	69,762	185,794
Revolving Loans Amortized Cost Basis	2,534	3,273	2,534	3,273	1,824
Revolving Loan Converted to Term	0	0	0	0	0
Total	734,604	679,217	734,604	679,217	707,022
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			0
Prior			0
Revolving Loans Amortized Cost Basis
Revolving Loan Converted to Term
Total			0
Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	322,193	406,474	322,193	406,474	483,288
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	385,232	309,589	385,232	309,589	286,299
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	216,796	173,325	216,796	173,325	155,426
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	107,935	101,762	107,935	101,762	88,490
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	53,714	47,932	53,714	47,932	39,009
Prior	21,309	16,020	21,309	16,020	12,119
Revolving Loans Amortized Cost Basis	458	483	458	483	504
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,107,637	1,055,585	1,107,637	1,055,585	1,065,135
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			192
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			915
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			1,689
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			477
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			299
Prior			234
Revolving Loans Amortized Cost Basis
Revolving Loan Converted to Term
Total	1,204	1,103	3,806	2,805
Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	106,267	163,702	106,267	163,702	210,565
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	235,027	209,665	235,027	209,665	198,450
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	194,550	174,374	194,550	174,374	129,311
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	119,523	84,398	119,523	84,398	83,562
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	77,116	62,225	77,116	62,225	74,801
Prior	307,228	234,289	307,228	234,289	262,098
Revolving Loans Amortized Cost Basis	108,599	122,366	108,599	122,366	111,970
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,148,310	1,051,019	1,148,310	1,051,019	1,070,757
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			0
Prior			6
Revolving Loans Amortized Cost Basis
Revolving Loan Converted to Term
Total	0	0	6	30
Satisfactory | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	37,300	34,589	37,300	34,589	42,038
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	36,456	31,762	36,456	31,762	28,718
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	23,602	26,654	23,602	26,654	16,870
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	10,622	7,554	10,622	7,554	7,857
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	4,799	9,605	4,799	9,605	8,129
Prior	21,459	11,194	21,459	11,194	20,379
Revolving Loans Amortized Cost Basis	10,328	8,008	10,328	8,008	8,909
Revolving Loan Converted to Term	0	0	0	0	0
Total	144,566	129,366	144,566	129,366	132,900
Satisfactory | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	57,761	106,549	57,761	106,549	152,858
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	157,741	136,306	157,741	136,306	115,111
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	106,128	247,780	106,128	247,780	121,811
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	121,968	40,959	121,968	40,959	43,647
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	41,827	30,667	41,827	30,667	63,913
Prior	184,590	64,934	184,590	64,934	159,876
Revolving Loans Amortized Cost Basis	2,035	3,052	2,035	3,052	1,603
Revolving Loan Converted to Term	0	0	0	0	0
Total	672,050	630,247	672,050	630,247	658,819
Special Mention | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	128	0	128	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0	0	0
Prior	0	35	0	35	30
Revolving Loans Amortized Cost Basis	0	35	0	35	30
Revolving Loan Converted to Term	0	0	0	0	0
Total	128	70	128	70	60
Special Mention | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	9,801	0	9,801	9,678
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	3,123	0	3,123	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	2,973	0	2,973	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	4,315	0	4,315	789
Prior	4,150	1,425	4,150	1,425	241
Revolving Loans Amortized Cost Basis	0	0	0	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	7,273	18,514	7,273	18,514	10,708
Substandard | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	3,318	0	3,318	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	479	0	479	255
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	445	0	445	478
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	26	0	26	0	0
Prior	3,245	37	3,245	37	3,464
Revolving Loans Amortized Cost Basis	101	5,258	101	5,258	3,136
Revolving Loan Converted to Term	0	0	0	0	0
Total	3,372	9,537	3,372	9,537	7,333
Substandard | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	9,531	0	9,531	607
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	9,299	4,723	9,299	4,723	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	1,685	11,352	1,685	11,352	5,807
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	2,590	1,133	2,590	1,133	812
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	797	93	797	93	4,371
Prior	40,411	3,403	40,411	3,403	25,677
Revolving Loans Amortized Cost Basis	499	221	499	221	221
Revolving Loan Converted to Term	0	0	0	0	0
Total	55,281	30,456	55,281	30,456	37,495
Doubtful | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0	0	0
Prior	0	0	0	0	0
Revolving Loans Amortized Cost Basis	0	0	0	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	0	0	0	0	0
Doubtful | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0	0	0
Prior	0	0	0	0	0
Revolving Loans Amortized Cost Basis	0	0	0	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	0	0	0	0	0
Performing | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	322,084	406,206	322,084	406,206	482,530
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	384,607	309,006	384,607	309,006	284,831
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	216,234	172,974	216,234	172,974	154,819
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	107,743	101,458	107,743	101,458	88,165
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	53,646	47,874	53,646	47,874	38,852
Prior	21,276	15,933	21,276	15,933	12,032
Revolving Loans Amortized Cost Basis	0	483	0	483	504
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,105,590	1,053,934	1,105,590	1,053,934	1,061,733
Performing | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	106,267	163,702	106,267	163,702	210,565
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	235,027	209,408	235,027	209,408	198,195
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	191,780	173,435	191,780	173,435	128,372
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	118,517	84,370	118,517	84,370	82,965
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	76,518	61,907	76,518	61,907	74,281
Prior	305,076	232,021	305,076	232,021	259,787
Revolving Loans Amortized Cost Basis	108,098	122,191	108,098	122,191	111,563
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,141,283	1,047,034	1,141,283	1,047,034	1,065,728
Nonperforming | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	109	268	109	268	758
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	625	583	625	583	1,468
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	562	351	562	351	607
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	192	304	192	304	325
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	68	58	68	58	157
Prior	33	87	33	87	87
Revolving Loans Amortized Cost Basis	458	0	458	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	2,047	1,651	2,047	1,651	3,402
Nonperforming | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	257	0	257	255
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	2,770	939	2,770	939	939
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,006	28	1,006	28	597
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	598	318	598	318	520
Prior	2,152	2,268	2,152	2,268	2,311
Revolving Loans Amortized Cost Basis	501	175	501	175	407
Revolving Loan Converted to Term	0	0	0	0	0
Total	$ 7,027	$ 3,985	$ 7,027	$ 3,985	$ 5,029