Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses and Recorded Investment in Loans (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
Allowance for credit losses:
Balance, beginning of period	$ 4,156	$ 3,989	$ 4,026	$ 3,918	$ 3,918
Provision for credit loss expense	186	69	488	304
Losses charged off	(55)	(59)	(247)	(243)
Recoveries	16	3	36	23
Balance, end of period	4,303	4,002	4,303	4,002	4,026
Allocation:
Ending balance: individually evaluated for credit losses	119	50	119	50
Ending balance: collectively evaluated for credit losses	4,184	3,952	4,184	3,952
Ending balance: collectively evaluated for impairment					4,026
Loans:
Ending balance: individually evaluated for credit losses	2,437	285	2,437	285
Ending balance: collectively evaluated for credit losses	494,100	474,719	494,100	474,719
Ending balance: individually evaluated for impairment					220
Ending balance: collectively evaluated for impairment					490,751
Commercial and Industrial
Allowance for credit losses:
Balance, beginning of period	633	628	699	573	573
Provision for credit loss expense	121	50	162	179
Losses charged off			(110)	(75)	(127)
Recoveries	3		6	1
Balance, end of period	757	678	757	678	699
Allocation:
Ending balance: individually evaluated for credit losses	119	50	119	50
Ending balance: collectively evaluated for credit losses	638	628	638	628
Ending balance: collectively evaluated for impairment					699
Loans:
Ending balance: individually evaluated for credit losses	477	57	477	57
Ending balance: collectively evaluated for credit losses	94,909	96,451	94,909	96,451
Ending balance: collectively evaluated for impairment					98,795
Commercial Real Estate
Allowance for credit losses:
Balance, beginning of period	1,473	1,413	1,488	1,408	1,408
Provision for credit loss expense	65	(23)	50	(18)
Losses charged off					(127)
Balance, end of period	1,538	1,390	1,538	1,390	1,488
Allocation:
Ending balance: collectively evaluated for credit losses	1,538	1,390	1,538	1,390
Ending balance: individually evaluated for impairment					0
Ending balance: collectively evaluated for impairment					1,488
Loans:
Ending balance: individually evaluated for credit losses	1,359	16	1,359	16
Ending balance: collectively evaluated for credit losses	301,718	277,648	301,718	277,648
Ending balance: individually evaluated for impairment					0
Ending balance: collectively evaluated for impairment					291,673
Residential
Allowance for credit losses:
Balance, beginning of period	1,938	1,813	1,708	1,843	1,843
Provision for credit loss expense	(46)	(12)	188	(35)
Losses charged off		(10)	(4)	(17)	(17)
Balance, end of period	1,892	1,791	1,892	1,791	1,708
Allocation:
Ending balance: collectively evaluated for credit losses	1,892	1,791	1,892	1,791
Ending balance: collectively evaluated for impairment					1,708
Loans:
Ending balance: individually evaluated for credit losses	589	212	589	212
Ending balance: collectively evaluated for credit losses	90,071	91,065	90,071	91,065
Ending balance: individually evaluated for impairment					220
Ending balance: collectively evaluated for impairment					91,517
Installment
Allowance for credit losses:
Balance, beginning of period	112	135	131	94	94
Provision for credit loss expense	46	54	88	178
Losses charged off	(55)	(49)	(133)	(151)
Recoveries	13	3	30	22
Balance, end of period	116	143	116	143	131
Allocation:
Ending balance: collectively evaluated for credit losses	116	143	116	143
Ending balance: collectively evaluated for impairment					131
Loans:
Ending balance: individually evaluated for credit losses	12		12
Ending balance: collectively evaluated for credit losses	$ 7,402	$ 9,555	$ 7,402	$ 9,555
Ending balance: collectively evaluated for impairment					$ 8,766