Allowance for Credit Losses on Loans and Off-Balance Sheet Credit Exposures - Schedule of Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	$ 185,316		$ 185,316		$ 301,182
Originated year before current fiscal year	216,278		216,278		150,237
Originated two year before current fiscal year	126,291		126,291		209,894
Originated three year before current fiscal year	195,376		195,376		162,938
Originated four year before current fiscal year	149,649		149,649		65,114
Prior	247,408		247,408		218,529
Revolving	53,955		53,955		47,842
Total	1,174,273		1,174,273		1,155,736
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			41		2
Originated year before current fiscal year			1		0
Originated two year before current fiscal year			4		0
Originated three year before current fiscal year			0		1
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	42	$ 1	46	$ 2	3
Residential real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	0	0	0	0
Residential real estate | Non-revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	36,455		36,455		88,752
Originated year before current fiscal year	81,073		81,073		75,580
Originated two year before current fiscal year	63,388		63,388		110,912
Originated three year before current fiscal year	104,172		104,172		82,876
Originated four year before current fiscal year	78,556		78,556		29,934
Prior	79,508		79,508		57,371
Revolving	0		0		0
Total	443,152		443,152		445,425
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Residential real estate | Revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	27,750		27,750		21,884
Total	27,750		27,750		21,884
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Residential real estate | Pass | Non-revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	31,813		31,813		83,371
Originated year before current fiscal year	74,706		74,706		70,515
Originated two year before current fiscal year	58,171		58,171		100,168
Originated three year before current fiscal year	92,942		92,942		79,234
Originated four year before current fiscal year	73,369		73,369		27,326
Prior	72,128		72,128		51,661
Revolving	0		0		0
Total	403,129		403,129		412,275
Residential real estate | Pass | Revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	26,028		26,028		20,516
Total	26,028		26,028		20,516
Residential real estate | Satisfactory/Monitor | Non-revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	4,642		4,642		5,381
Originated year before current fiscal year	6,367		6,367		5,065
Originated two year before current fiscal year	5,217		5,217		10,744
Originated three year before current fiscal year	10,577		10,577		3,642
Originated four year before current fiscal year	5,187		5,187		2,450
Prior	7,209		7,209		5,627
Revolving	0		0		0
Total	39,199		39,199		32,909
Residential real estate | Satisfactory/Monitor | Revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	1,691		1,691		1,344
Total	1,691		1,691		1,344
Residential real estate | Substandard | Non-revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	653		653		0
Originated four year before current fiscal year	0		0		158
Prior	171		171		83
Revolving	0		0		0
Total	824		824		241
Residential real estate | Substandard | Revolving residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	31		31		24
Total	31		31		24
Construction real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	0	0	0	0
Construction real estate | Commercial construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	6,968		6,968		22,492
Originated year before current fiscal year	29,825		29,825		17,492
Originated two year before current fiscal year	15,265		15,265		6,274
Originated three year before current fiscal year	1,664		1,664		7,260
Originated four year before current fiscal year	1,888		1,888		612
Prior	1,113		1,113		855
Revolving	0		0		0
Total	56,723		56,723		54,985
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Construction real estate | Residential construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	26,564		26,564		36,388
Originated year before current fiscal year	23,648		23,648		10,272
Originated two year before current fiscal year	2,394		2,394		1,096
Originated three year before current fiscal year	1,197		1,197		2,307
Originated four year before current fiscal year	2,016		2,016		1,139
Prior	985		985		0
Revolving	0		0		0
Total	56,804		56,804		51,202
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Construction real estate | Pass | Commercial construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	3,886		3,886		8,968
Originated year before current fiscal year	6,234		6,234		2,216
Originated two year before current fiscal year	1,288		1,288		4,514
Originated three year before current fiscal year	1,664		1,664		1,460
Originated four year before current fiscal year	1,139		1,139		559
Prior	995		995		714
Revolving	0		0		0
Total	15,206		15,206		18,431
Construction real estate | Pass | Residential construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	24,244		24,244		34,189
Originated year before current fiscal year	21,892		21,892		8,725
Originated two year before current fiscal year	2,394		2,394		960
Originated three year before current fiscal year	997		997		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	49,527		49,527		43,874
Construction real estate | Satisfactory/Monitor | Commercial construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	3,082		3,082		13,524
Originated year before current fiscal year	23,591		23,591		15,276
Originated two year before current fiscal year	967		967		1,760
Originated three year before current fiscal year	0		0		5,800
Originated four year before current fiscal year	749		749		53
Prior	118		118		141
Revolving	0		0		0
Total	28,507		28,507		36,554
Construction real estate | Satisfactory/Monitor | Residential construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	2,320		2,320		2,199
Originated year before current fiscal year	1,756		1,756		1,547
Originated two year before current fiscal year	0		0		136
Originated three year before current fiscal year	200		200		2,307
Originated four year before current fiscal year	2,016		2,016		1,139
Prior	985		985		0
Revolving	0		0		0
Total	7,277		7,277		7,328
Construction real estate | Substandard | Commercial construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	13,010		13,010		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	13,010		13,010		0
Construction real estate | Substandard | Residential construction real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	0	0	0	0
Commercial real estate | Non-residential commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	9,968		9,968		51,495
Originated year before current fiscal year	65,675		65,675		27,846
Originated two year before current fiscal year	25,814		25,814		65,519
Originated three year before current fiscal year	64,715		64,715		45,936
Originated four year before current fiscal year	44,201		44,201		24,130
Prior	100,407		100,407		94,652
Revolving	20,411		20,411		20,432
Total	331,191		331,191		330,010
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Commercial real estate | Multi-family residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	3,101		3,101		2,283
Originated year before current fiscal year	2,230		2,230		2,767
Originated two year before current fiscal year	5,830		5,830		19,309
Originated three year before current fiscal year	18,862		18,862		20,406
Originated four year before current fiscal year	19,739		19,739		7,388
Prior	52,529		52,529		52,175
Revolving	0		0		0
Total	102,291		102,291		104,328
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	0	0	0	0
Commercial real estate | Pass | Non-residential commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	6,216		6,216		3,427
Originated year before current fiscal year	4,818		4,818		10,481
Originated two year before current fiscal year	11,028		11,028		49,645
Originated three year before current fiscal year	45,562		45,562		31,969
Originated four year before current fiscal year	28,299		28,299		17,227
Prior	69,821		69,821		64,073
Revolving	4,502		4,502		5,431
Total	170,246		170,246		182,253
Commercial real estate | Pass | Multi-family residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	851		851		1,720
Originated year before current fiscal year	454		454		283
Originated two year before current fiscal year	136		136		4,329
Originated three year before current fiscal year	4,064		4,064		10,115
Originated four year before current fiscal year	4,751		4,751		1,853
Prior	36,159		36,159		31,787
Revolving	0		0		0
Total	46,415		46,415		50,087
Commercial real estate | Satisfactory/Monitor | Non-residential commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	3,752		3,752		48,068
Originated year before current fiscal year	60,857		60,857		17,365
Originated two year before current fiscal year	14,786		14,786		15,874
Originated three year before current fiscal year	19,153		19,153		13,967
Originated four year before current fiscal year	15,902		15,902		5,297
Prior	27,562		27,562		27,610
Revolving	15,909		15,909		14,954
Total	157,921		157,921		143,135
Commercial real estate | Satisfactory/Monitor | Multi-family residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	2,250		2,250		563
Originated year before current fiscal year	1,776		1,776		2,484
Originated two year before current fiscal year	5,694		5,694		14,980
Originated three year before current fiscal year	14,798		14,798		10,291
Originated four year before current fiscal year	14,988		14,988		5,535
Prior	16,127		16,127		20,132
Revolving	0		0		0
Total	55,633		55,633		53,985
Commercial real estate | Substandard | Non-residential commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		1,606
Prior	3,024		3,024		2,969
Revolving	0		0		47
Total	3,024		3,024		4,622
Commercial real estate | Substandard | Multi-family residential real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	243		243		256
Revolving	0		0		0
Total	243		243		256
Total commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	2,709		2,709		5,182
Originated year before current fiscal year	4,309		4,309		5,021
Originated two year before current fiscal year	3,789		3,789		5,316
Originated three year before current fiscal year	4,204		4,204		3,494
Originated four year before current fiscal year	2,885		2,885		573
Prior	9,050		9,050		10,087
Revolving	5,773		5,773		5,502
Total	32,719		32,719		35,175
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			41		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	41	0	41	0	0
Total commercial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	1,863		1,863		3,224
Originated year before current fiscal year	2,259		2,259		2,583
Originated two year before current fiscal year	2,189		2,189		4,417
Originated three year before current fiscal year	2,351		2,351		1,517
Originated four year before current fiscal year	1,180		1,180		370
Prior	6,629		6,629		7,492
Revolving	5,085		5,085		3,483
Total	21,556		21,556		23,086
Total commercial | Satisfactory/Monitor
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	846		846		1,958
Originated year before current fiscal year	2,050		2,050		2,438
Originated two year before current fiscal year	1,600		1,600		899
Originated three year before current fiscal year	1,853		1,853		1,977
Originated four year before current fiscal year	1,705		1,705		203
Prior	2,168		2,168		2,595
Revolving	688		688		1,295
Total	10,910		10,910		11,365
Total commercial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	253		253		0
Revolving	0		0		724
Total	253		253		724
Consumer
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	1,231		1,231		1,310
Originated year before current fiscal year	622		622		777
Originated two year before current fiscal year	521		521		105
Originated three year before current fiscal year	48		48		53
Originated four year before current fiscal year	17		17		66
Prior	199		199		188
Revolving	21		21		24
Total	2,659		2,659		2,523
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		2
Originated year before current fiscal year			1		0
Originated two year before current fiscal year			4		0
Originated three year before current fiscal year			0		1
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	1	1	5	2	3
Consumer | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	1,230		1,230		1,253
Originated year before current fiscal year	622		622		777
Originated two year before current fiscal year	521		521		105
Originated three year before current fiscal year	48		48		53
Originated four year before current fiscal year	17		17		66
Prior	199		199		188
Revolving	21		21		24
Total	2,658		2,658		2,466
Consumer | Satisfactory/Monitor
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	1		1		57
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	1		1		57
Consumer | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Municipal
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	98,320		98,320		93,280
Originated year before current fiscal year	8,896		8,896		10,482
Originated two year before current fiscal year	9,290		9,290		1,363
Originated three year before current fiscal year	514		514		606
Originated four year before current fiscal year	347		347		1,272
Prior	3,617		3,617		3,201
Revolving	0		0		0
Total	120,984		120,984		110,204
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Originated in current year			0		0
Originated year before current fiscal year			0		0
Originated two year before current fiscal year			0		0
Originated three year before current fiscal year			0		0
Originated four year before current fiscal year			0		0
Prior			0		0
Revolving			0		0
Total	0	$ 0	0	$ 0	0
Municipal | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	98,320		98,320		93,280
Originated year before current fiscal year	8,896		8,896		10,482
Originated two year before current fiscal year	9,290		9,290		1,363
Originated three year before current fiscal year	514		514		606
Originated four year before current fiscal year	347		347		1,272
Prior	3,617		3,617		3,201
Revolving	0		0		0
Total	120,984		120,984		110,204
Municipal | Satisfactory/Monitor
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Municipal | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated in current year	0		0		0
Originated year before current fiscal year	0		0		0
Originated two year before current fiscal year	0		0		0
Originated three year before current fiscal year	0		0		0
Originated four year before current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	$ 0		$ 0		$ 0