Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 114,543	$ 104,735	$ 703,501
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	420,957	803,103	792,838
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	535,729	601,909	519,887
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	357,539	405,380	344,185
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	230,018	208,299	164,593
Prior	1,468,427	755,418	548,654
Revolving Loans Amortized Cost Basis	131,545	126,508	139,250
Revolving Loan Converted to Term	0	0	0
Total	3,258,758	3,005,352	3,212,908
Current-period gross charge-offs
Total	1,283	1,328
Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	8,925	4,727	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	25,424	35,164	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	18,661	26,254	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	17,276	13,145	9,772
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	5,751	7,250	4,107
Prior	72,717	38,460	16,559
Revolving Loans Amortized Cost Basis	13,635	10,917	13,685
Revolving Loan Converted to Term	0	0	0
Total	162,389	135,917	156,224
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	9
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	9
Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,548	12,605	81,732
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	50,629	167,684	171,426
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	121,880	115,019	107,035
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	61,740	127,836	123,378
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,647	43,516	42,197
Prior	418,518	246,990	217,555
Revolving Loans Amortized Cost Basis	2,007	1,707	2,164
Revolving Loan Converted to Term	0	0	0
Total	750,969	715,357	745,487
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	0
Revolving Loan Converted to Term	0
Total	0
Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	83,515	71,838	405,307
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	261,989	380,369	356,000
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	209,079	262,765	196,350
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	110,728	138,468	93,918
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	50,777	75,911	44,287
Prior	409,197	143,561	15,337
Revolving Loans Amortized Cost Basis	469	457	468
Revolving Loan Converted to Term	0	0	0
Total	1,125,754	1,073,369	1,111,667
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	583
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	150
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	248
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	177
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	104
Prior	12
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	1,274	1,328
Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	12,555	15,565	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	82,915	219,886	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	186,109	197,871	193,032
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	167,795	125,931	117,117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,843	81,622	74,002
Prior	567,995	326,407	299,203
Revolving Loans Amortized Cost Basis	115,434	113,427	122,933
Revolving Loan Converted to Term	0	0	0
Total	1,219,646	1,080,709	1,199,530
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	0
Revolving Loan Converted to Term	0
Total	0	0
Satisfactory | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	8,925	4,727	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	25,424	35,164	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	18,661	26,254	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	17,276	12,765	9,655
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	5,645	6,830	4,107
Prior	69,588	35,014	13,360
Revolving Loans Amortized Cost Basis	9,915	8,095	8,586
Revolving Loan Converted to Term	0	0	0
Total	155,434	128,849	147,809
Satisfactory | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,548	12,605	81,582
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	50,480	157,534	151,818
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	109,750	115,019	105,365
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	60,070	122,364	120,845
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	84,319	42,710	41,406
Prior	368,036	212,115	174,516
Revolving Loans Amortized Cost Basis	1,885	1,679	1,667
Revolving Loan Converted to Term	0	0	0
Total	684,088	664,026	677,199
Special mention | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	150	117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	106	0	0
Prior	0	26	0
Revolving Loans Amortized Cost Basis	0	26	0
Revolving Loan Converted to Term	0	0	0
Total	106	202	117
Special mention | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	10,439
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	3,092	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0
Prior	15,380	5,043	4,084
Revolving Loans Amortized Cost Basis	0	0	0
Revolving Loan Converted to Term	0	0	0
Total	18,472	5,043	14,523
Substandard | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	230	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	420	0
Prior	3,129	3,420	3,199
Revolving Loans Amortized Cost Basis	3,720	2,796	5,099
Revolving Loan Converted to Term	0	0	0
Total	6,849	6,866	8,298
Substandard | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	150
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	149	10,150	9,169
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	9,038	0	1,670
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,670	5,472	2,533
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	2,328	806	791
Prior	35,102	29,832	38,955
Revolving Loans Amortized Cost Basis	122	28	497
Revolving Loan Converted to Term	0	0	0
Total	48,409	46,288	53,765
Doubtful | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	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
Doubtful | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	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
Performing | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	83,515	71,838	405,099
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	261,853	379,339	355,217
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	208,788	261,675	195,799
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	110,546	138,034	93,708
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	50,713	75,650	44,206
Prior	407,586	143,190	15,252
Revolving Loans Amortized Cost Basis	459	0	0
Revolving Loan Converted to Term	0	0	0
Total	1,123,460	1,069,726	1,109,281
Performing | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	12,555	15,565	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	82,726	219,336	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	185,667	197,436	192,588
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	166,141	124,992	116,451
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,843	80,986	73,875
Prior	564,901	323,945	296,935
Revolving Loans Amortized Cost Basis	115,104	113,220	122,573
Revolving Loan Converted to Term	0	0	0
Total	1,213,937	1,075,480	1,195,665
Nonperforming | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	208
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	136	1,030	783
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	291	1,090	551
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	182	434	210
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	64	261	81
Prior	1,611	371	85
Revolving Loans Amortized Cost Basis	10	457	468
Revolving Loan Converted to Term	0	0	0
Total	2,294	3,643	2,386
Nonperforming | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	189	550	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	442	435	444
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,654	939	666
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	636	127
Prior	3,094	2,462	2,268
Revolving Loans Amortized Cost Basis	330	207	360
Revolving Loan Converted to Term	0	0	0
Total	$ 5,709	$ 5,229	$ 3,865