Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 341,142	$ 328,019	$ 341,142	$ 328,019	$ 703,501
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	667,182	856,952	667,182	856,952	792,838
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	713,833	568,230	713,833	568,230	519,887
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	480,648	381,352	480,648	381,352	344,185
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	310,199	192,867	310,199	192,867	164,593
Prior	661,439	626,542	661,439	626,542	548,654
Revolving Loans Amortized Cost Basis	141,080	115,935	141,080	115,935	139,250
Revolving Loan Converted to Term	0	0	0	0	0
Total	3,315,523	3,069,897	3,315,523	3,069,897	3,212,908
Current-period gross charge-offs
Total	1,850	1,280	3,133	2,608
Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	19,007	15,063	19,007	15,063	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	46,303	38,012	46,303	38,012	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	29,211	25,715	29,211	25,715	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	20,914	11,792	20,914	11,792	9,772
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	7,952	5,823	7,952	5,823	4,107
Prior	24,373	38,861	24,373	38,861	16,559
Revolving Loans Amortized Cost Basis	16,072	12,252	16,072	12,252	13,685
Revolving Loan Converted to Term	0	0	0	0	0
Total	163,832	147,518	163,832	147,518	156,224
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			9	0	0
Prior			0	0	0
Revolving Loans Amortized Cost Basis			0	0	0
Revolving Loan Converted to Term			0	0	0
Total			9	0	0
Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	35,839	32,681	35,839	32,681	81,732
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	89,701	172,008	89,701	172,008	171,426
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	150,885	107,485	150,885	107,485	107,035
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	112,660	125,730	112,660	125,730	123,378
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	120,966	43,199	120,966	43,199	42,197
Prior	244,212	239,849	244,212	239,849	217,555
Revolving Loans Amortized Cost Basis	3,215	2,996	3,215	2,996	2,164
Revolving Loan Converted to Term	0	0	0	0	0
Total	757,478	723,948	757,478	723,948	745,487
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			0	0	0
Prior			0	0	0
Revolving Loans Amortized Cost Basis			0	0	0
Revolving Loan Converted to Term			0	0	0
Total			0	0	0
Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	221,494	217,721	221,494	217,721	405,307
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	353,402	415,103	353,402	415,103	356,000
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	299,737	238,782	299,737	238,782	196,350
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	158,436	122,385	158,436	122,385	93,918
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	69,433	64,441	69,433	64,441	44,287
Prior	35,832	28,860	35,832	28,860	15,337
Revolving Loans Amortized Cost Basis	479	473	479	473	468
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,138,813	1,087,765	1,138,813	1,087,765	1,111,667
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			834	95	366
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			441	705	1,368
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			888	1,034	2,122
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			597	324	604
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			214	246	397
Prior			150	198	266
Revolving Loans Amortized Cost Basis			0	0	0
Revolving Loan Converted to Term			0	0	0
Total	1,850	1,274	3,124	2,602	5,123
Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	64,802	62,554	64,802	62,554	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	177,776	231,829	177,776	231,829	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	234,000	196,248	234,000	196,248	193,032
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	188,638	121,445	188,638	121,445	117,117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	111,848	79,404	111,848	79,404	74,002
Prior	357,022	318,972	357,022	318,972	299,203
Revolving Loans Amortized Cost Basis	121,314	100,214	121,314	100,214	122,933
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,255,400	1,110,666	1,255,400	1,110,666	1,199,530
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff			0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff			0	0	21
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff			0	0	0
Prior			0	6	33
Revolving Loans Amortized Cost Basis			0	0	0
Revolving Loan Converted to Term			0	0	0
Total	0	6	0	6	54
Satisfactory | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	19,007	15,063	19,007	15,063	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	46,303	38,012	46,303	38,012	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	29,211	25,715	29,211	25,715	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	20,914	11,653	20,914	11,653	9,655
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	7,857	5,763	7,857	5,763	4,107
Prior	21,277	35,571	21,277	35,571	13,360
Revolving Loans Amortized Cost Basis	13,079	9,487	13,079	9,487	8,586
Revolving Loan Converted to Term	0	0	0	0	0
Total	157,648	141,264	157,648	141,264	147,809
Satisfactory | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	35,839	32,681	35,839	32,681	81,582
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	89,553	162,581	89,553	162,581	151,818
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	130,911	105,800	130,911	105,800	105,365
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	110,649	123,336	110,649	123,336	120,845
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	118,694	42,397	118,694	42,397	41,406
Prior	201,890	191,641	201,890	191,641	174,516
Revolving Loans Amortized Cost Basis	3,093	2,971	3,093	2,971	1,667
Revolving Loan Converted to Term	0	0	0	0	0
Total	690,629	661,407	690,629	661,407	677,199
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	0	139	0	139	117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	95	0	95	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	95	139	95	139	117
Special mention | 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	10,439
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	10,892	0	10,892	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	8,005	4,987	8,005	4,987	4,084
Revolving Loans Amortized Cost Basis	0	0	0	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	18,897	4,987	18,897	4,987	14,523
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	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	60	0	60	0
Prior	3,096	3,290	3,096	3,290	3,199
Revolving Loans Amortized Cost Basis	2,993	2,765	2,993	2,765	5,099
Revolving Loan Converted to Term	0	0	0	0	0
Total	6,089	6,115	6,089	6,115	8,298
Substandard | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0	0	150
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	148	9,427	148	9,427	9,169
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	9,082	1,685	9,082	1,685	1,670
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	2,011	2,394	2,011	2,394	2,533
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	2,272	802	2,272	802	791
Prior	34,317	43,221	34,317	43,221	38,955
Revolving Loans Amortized Cost Basis	122	25	122	25	497
Revolving Loan Converted to Term	0	0	0	0	0
Total	47,952	57,554	47,952	57,554	53,765
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	221,472	217,691	221,472	217,691	405,099
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	353,205	414,437	353,205	414,437	355,217
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	299,384	238,016	299,384	238,016	195,799
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	157,987	122,156	157,987	122,156	93,708
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	69,260	64,295	69,260	64,295	44,206
Prior	35,735	28,740	35,735	28,740	15,252
Revolving Loans Amortized Cost Basis	479	0	479	0	0
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,137,522	1,085,335	1,137,522	1,085,335	1,109,281
Performing | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	64,802	62,554	64,802	62,554	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	177,575	231,714	177,575	231,714	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	233,558	195,831	233,558	195,831	192,588
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	188,007	120,506	188,007	120,506	116,451
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	111,407	78,455	111,407	78,455	73,875
Prior	354,568	316,683	354,568	316,683	296,935
Revolving Loans Amortized Cost Basis	120,968	99,788	120,968	99,788	122,573
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,250,885	1,105,531	1,250,885	1,105,531	1,195,665
Nonperforming | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	22	30	22	30	208
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	197	666	197	666	783
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	353	766	353	766	551
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	449	229	449	229	210
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	173	146	173	146	81
Prior	97	120	97	120	85
Revolving Loans Amortized Cost Basis	0	473	0	473	468
Revolving Loan Converted to Term	0	0	0	0	0
Total	1,291	2,430	1,291	2,430	2,386
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	201	115	201	115	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	442	417	442	417	444
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	631	939	631	939	666
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	441	949	441	949	127
Prior	2,454	2,289	2,454	2,289	2,268
Revolving Loans Amortized Cost Basis	346	426	346	426	360
Revolving Loan Converted to Term	0	0	0	0	0
Total	$ 4,515	$ 5,135	$ 4,515	$ 5,135	$ 3,865