Loans - Schedule of Recorded Investment Aging In Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Total Loans	$ 886,226	$ 900,171
90 Days and Greater Past Due and Accruing	0	0
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	2,445	715
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	52	638
90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	8,669	6,895
Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	11,166	8,246
Current
Financing Receivable, Past Due [Line Items]
Total Loans	875,060	891,925
Real estate loans: | One-to-four family:
Financing Receivable, Past Due [Line Items]
Total Loans	262,578	269,809
90 Days and Greater Past Due and Accruing	0	0
Real estate loans: | One-to-four family: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	668	34
Real estate loans: | One-to-four family: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	49	339
Real estate loans: | One-to-four family: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	351	352
Real estate loans: | One-to-four family: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	1,068	725
Real estate loans: | One-to-four family: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	261,510	269,084
Real estate loans: | Home equity:
Financing Receivable, Past Due [Line Items]
Total Loans	28,326	26,896
90 Days and Greater Past Due and Accruing	0	0
Real estate loans: | Home equity: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	35	249
Real estate loans: | Home equity: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Real estate loans: | Home equity: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	138	66
Real estate loans: | Home equity: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	173	315
Real estate loans: | Home equity: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	28,153	26,581
Real estate loans: | Commercial and multifamily:
Financing Receivable, Past Due [Line Items]
Total Loans	391,537	370,282
90 Days and Greater Past Due and Accruing	0	0
Real estate loans: | Commercial and multifamily: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	967	0
Real estate loans: | Commercial and multifamily: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Real estate loans: | Commercial and multifamily: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	5,621	3,733
Real estate loans: | Commercial and multifamily: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	6,588	3,731
Real estate loans: | Commercial and multifamily: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	384,949	366,551
Real estate loans: | Construction and land:
Financing Receivable, Past Due [Line Items]
Total Loans	42,279	72,812
90 Days and Greater Past Due and Accruing	0	0
Real estate loans: | Construction and land: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	24
Real estate loans: | Construction and land: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Real estate loans: | Construction and land: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Real estate loans: | Construction and land: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	24
Real estate loans: | Construction and land: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	42,279	72,788
Consumer loans: | Manufactured homes:
Financing Receivable, Past Due [Line Items]
Total Loans	42,301	40,980
90 Days and Greater Past Due and Accruing	0	0
Consumer loans: | Manufactured homes: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	770	402
Consumer loans: | Manufactured homes: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	287
Consumer loans: | Manufactured homes: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	200	394
Consumer loans: | Manufactured homes: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	970	1,083
Consumer loans: | Manufactured homes: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	41,331	39,897
Consumer loans: | Floating homes:
Financing Receivable, Past Due [Line Items]
Total Loans	86,211	85,990
90 Days and Greater Past Due and Accruing	0	0
Consumer loans: | Floating homes: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Consumer loans: | Floating homes: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Consumer loans: | Floating homes: | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	2,350	2,350
Consumer loans: | Floating homes: | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	2,350	2,350
Consumer loans: | Floating homes: | Current
Financing Receivable, Past Due [Line Items]
Total Loans	83,861	83,640
Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Total Loans	18,244	17,738
90 Days and Greater Past Due and Accruing	0	0
Consumer loans: | Other consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	5	6
Consumer loans: | Other consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	3	12
Consumer loans: | Other consumer | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	9	0
Consumer loans: | Other consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	17	18
Consumer loans: | Other consumer | Current
Financing Receivable, Past Due [Line Items]
Total Loans	18,227	17,720
Commercial business
Financing Receivable, Past Due [Line Items]
Total Loans	14,750	15,664
90 Days and Greater Past Due and Accruing	0	0
Commercial business | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Commercial business | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Commercial business | 90 Days and Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Commercial business | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Commercial business | Current
Financing Receivable, Past Due [Line Items]
Total Loans	$ 14,750	$ 15,664