Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 152,627		$ 684,361
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	690,876		602,020
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	568,894		644,738
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	610,183		432,543
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	410,855		279,745
Prior	840,350		601,873
Revolving Loans Amortized Cost Basis	143,083		149,261
Revolving Loan Converted to Term	0		0
Total	3,416,868		3,394,541
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0		1,272
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	363		949
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	392		1,669
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	357		1,270
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	317		443
Prior	121		292
Revolving Loans Amortized Cost Basis			0
Revolving Loan Converted to Term	0		0
Total	1,550	$ 1,283	5,895
Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	7,816		42,874
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	41,090		29,497
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	27,015		25,002
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	22,782		16,941
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	15,801		6,255
Prior	26,975		22,241
Revolving Loans Amortized Cost Basis	12,796		16,181
Revolving Loan Converted to Term	0		0
Total	154,275		158,991
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	0		9
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	0		9
Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,712		93,051
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	106,973		97,129
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	97,324		149,998
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	148,903		111,071
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	109,881		117,885
Prior	327,273		223,561
Revolving Loans Amortized Cost Basis	3,949		3,670
Revolving Loan Converted to Term	0		0
Total	804,015		796,365
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	0		0
Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	105,293		386,349
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	368,228		298,122
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	269,795		244,086
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	217,096		122,396
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	105,613		48,446
Prior	52,235		19,109
Revolving Loans Amortized Cost Basis	475		473
Revolving Loan Converted to Term	0		0
Total	1,118,735		1,118,981
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0		1,272
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	363		949
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	392		1,669
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	357		1,270
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	317		434
Prior	90		243
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	1,519	1,274	5,837
Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	29,806		162,087
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	174,585		177,272
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	174,760		225,652
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	221,402		182,135
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	179,560		107,159
Prior	433,867		336,962
Revolving Loans Amortized Cost Basis	125,863		128,937
Revolving Loan Converted to Term	0		0
Total	1,339,843		1,320,204
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	0		0
Prior	31		49
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	31	$ 0	49
Satisfactory | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	7,720		42,767
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	41,090		28,988
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	26,444		23,808
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	21,475		16,941
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	15,801		6,183
Prior	23,978		19,211
Revolving Loans Amortized Cost Basis	9,801		15,686
Revolving Loan Converted to Term	0		0
Total	146,309		153,584
Satisfactory | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,712		90,049
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	103,985		96,783
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	96,978		137,146
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	136,141		109,086
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	107,903		115,576
Prior	296,123		187,202
Revolving Loans Amortized Cost Basis	2,578		2,799
Revolving Loan Converted to Term	0		0
Total	753,420		738,641
Special mention | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	96		107
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		229
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	70		930
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	189		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0		72
Prior	0		0
Revolving Loans Amortized Cost Basis	483		483
Revolving Loan Converted to Term	0		0
Total	838		1,821
Special mention | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		3,002
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	2,988		200
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0		12,680
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	12,593		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0		0
Prior	3,033		9,506
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	18,614		25,388
Substandard | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		280
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	501		264
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,118		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0		0
Prior	2,997		3,030
Revolving Loans Amortized Cost Basis	2,512		12
Revolving Loan Converted to Term	0		0
Total	7,128		3,586
Substandard | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		146
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	346		172
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	169		1,985
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	322		2,309
Prior	14,765		26,853
Revolving Loans Amortized Cost Basis	1,371		871
Revolving Loan Converted to Term	0		0
Total	16,973		32,336
Doubtful | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0		0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	0		0
Doubtful | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0		0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0		0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	1,656		0
Prior	13,352		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	15,008		0
Performing | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	105,293		386,004
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	368,022		297,698
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	269,633		243,484
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	216,799		121,803
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	105,322		48,268
Prior	52,138		18,994
Revolving Loans Amortized Cost Basis	475		473
Revolving Loan Converted to Term	0		0
Total	1,117,682		1,116,724
Performing | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	29,806		162,087
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	174,585		177,071
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	174,559		225,398
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	221,058		181,934
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	179,359		106,695
Prior	431,930		334,576
Revolving Loans Amortized Cost Basis	125,606		128,687
Revolving Loan Converted to Term	0		0
Total	1,336,903		1,316,448
Nonperforming | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		345
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	206		424
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	162		602
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	297		593
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	291		178
Prior	97		115
Revolving Loans Amortized Cost Basis	0		0
Revolving Loan Converted to Term	0		0
Total	1,053		2,257
Nonperforming | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0		0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0		201
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	201		254
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	344		201
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	201		464
Prior	1,937		2,386
Revolving Loans Amortized Cost Basis	257		250
Revolving Loan Converted to Term	0		0
Total	$ 2,940		$ 3,756