Loans - Schedule of Activity in Allowance for Loan Losses, Excluding Accrued Interest (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($) loan
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	$ 8,536	$ 8,493	$ 8,499	$ 8,760
Charge-offs	(57)	(20)	(107)	(103)
Recoveries	20	6	28	16
Provision for (Release of) Credit Losses	65	106	144	(88)
Ending Allowance	8,564	8,585	8,564	8,585
Charge-offs	57	20	107	103
Real estate loans: | One-to-four family:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,327	2,798	3,025	2,630
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	(47)	14	255	182
Ending Allowance	3,280	2,812	3,280	2,812
Charge-offs	0	0	0	0
Real estate loans: | Home equity:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	360	199	307	185
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	(6)	15	47	29
Ending Allowance	354	214	354	214
Charge-offs	0	0	0	0
Real estate loans: | Commercial and multifamily:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,236	1,130	1,218	1,070
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	74	155	92	215
Ending Allowance	1,310	1,285	1,310	1,285
Charge-offs	0	0	0	0
Real estate loans: | Construction and land:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	269	1,072	992	1,349
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	64	(302)	(659)	(579)
Ending Allowance	333	770	333	770
Charge-offs	0	0	0	0
Consumer loans: | Manufactured homes:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,395	938	1,172	971
Charge-offs	(47)		(66)	(23)
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	31	53	273	43
Ending Allowance	$ 1,379	991	$ 1,379	$ 991
Number of loans charged off | loan	1		2	1
Charge-offs	$ 47		$ 66	$ 23
Consumer loans: | Manufactured home loans 2022
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs			(19)
Charge-offs			19
Consumer loans: | Manufactured home loans 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs			(47)
Charge-offs			47
Consumer loans: | Floating homes:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,410	1,910	1,282	2,022
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	(47)	150	81	38
Ending Allowance	1,363	2,060	1,363	2,060
Charge-offs	0	0	0	0
Consumer loans: | Other consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	451	348	401	426
Charge-offs	(10)	(20)	(41)	(80)
Recoveries	20	6	28	16
Provision for (Release of) Credit Losses	(21)	23	52	(5)
Ending Allowance	440	357	440	357
Charge-offs	10	20	41	80
Consumer loans: | Other consumer | Consumer Borrower
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs	$ (1)
Number of loans charged off | loan	1
Charge-offs	$ 1
Consumer loans: | Other consumer, origination 2021
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs			$ (1)
Number of loans charged off | loan			1
Charge-offs			$ 1
Consumer loans: | Other consumer, origination 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs			$ (16)
Number of loans charged off | loan			1
Charge-offs			$ 16
Commercial business
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	88	98	102	107
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Release of) Credit Losses	17	(2)	3	(11)
Ending Allowance	105	96	105	96
Charge-offs	$ 0	$ 0	$ 0	$ 0