Loans - Term Loans Amortized Cost Basis by Origination Year (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	$ 123,321	$ 113,770
Year two	92,473	249,701
Year three	218,805	280,109
Year four	252,107	59,744
Year five	51,822	54,481
Prior	140,028	115,811
Revolving Loans Amortized Cost Basis	20,480	20,860
Revolving Loans Amortized Cost Basis Converted to Term	1,135	2
Total loans, gross	900,171	894,478
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	123,283	111,527
Year two	92,046	248,307
Year three	198,777	279,786
Year four	246,227	55,040
Year five	49,657	48,312
Prior	123,000	113,616
Revolving Loans Amortized Cost Basis	20,058	20,375
Revolving Loans Amortized Cost Basis Converted to Term	1,069	0
Total loans, gross	854,117	876,963
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	17,349	0
Year four	0	3,365
Year five	0	0
Prior	1,375	350
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	18,724	3,715
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	38	2,243
Year two	427	1,394
Year three	2,679	323
Year four	5,880	1,339
Year five	2,165	6,169
Prior	15,653	1,845
Revolving Loans Amortized Cost Basis	422	485
Revolving Loans Amortized Cost Basis Converted to Term	66	2
Total loans, gross	27,330	13,800
Real estate loans: | One- to four- family
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	26,327	26,272
Year two	22,470	84,726
Year three	78,686	110,607
Year four	98,483	16,126
Year five	14,095	13,289
Prior	29,748	28,692
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	269,809	279,712
Real estate loans: | One- to four- family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	26,327	26,272
Year two	22,470	84,467
Year three	78,427	110,488
Year four	98,379	16,126
Year five	14,095	13,029
Prior	29,534	28,139
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	269,232	278,521
Real estate loans: | One- to four- family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	259
Year three	259	119
Year four	104	0
Year five	0	260
Prior	214	553
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	577	1,191
Real estate loans: | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,084	3,963
Year two	2,951	2,783
Year three	2,420	1,072
Year four	908	302
Year five	210	95
Prior	1,376	1,671
Revolving Loans Amortized Cost Basis	14,812	13,427
Revolving Loans Amortized Cost Basis Converted to Term	1,135	2
Total loans, gross	26,896	23,315
Real estate loans: | Home equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,084	3,963
Year two	2,951	2,783
Year three	2,420	1,072
Year four	908	302
Year five	210	95
Prior	1,320	1,608
Revolving Loans Amortized Cost Basis	14,578	12,982
Revolving Loans Amortized Cost Basis Converted to Term	1,069	0
Total loans, gross	26,540	22,805
Real estate loans: | Home equity | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	56	63
Revolving Loans Amortized Cost Basis	234	445
Revolving Loans Amortized Cost Basis Converted to Term	66	2
Total loans, gross	356	510
Real estate loans: | Commercial and multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	34,844	21,144
Year two	20,736	76,996
Year three	90,067	93,932
Year four	117,376	27,413
Year five	23,405	34,956
Prior	83,854	59,859
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	370,282	314,300
Real estate loans: | Commercial and multifamily | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	34,844	21,144
Year two	20,736	75,960
Year three	90,067	93,932
Year four	111,601	22,731
Year five	21,240	29,822
Prior	67,336	58,388
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	345,824	301,977
Real estate loans: | Commercial and multifamily | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	3,365
Year five	0	0
Prior	1,375	350
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	1,375	3,715
Real estate loans: | Commercial and multifamily | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	1,036
Year three	0	0
Year four	5,775	1,317
Year five	2,165	5,134
Prior	15,143	1,121
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	23,083	8,608
Real estate loans: | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	26,458	32,057
Year two	22,846	53,302
Year three	19,585	36,285
Year four	968	967
Year five	593	1,290
Prior	2,362	2,075
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	72,812	125,976
Real estate loans: | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	26,458	32,057
Year two	22,846	53,302
Year three	2,166	36,285
Year four	968	967
Year five	593	601
Prior	2,338	2,031
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	55,369	125,243
Real estate loans: | Construction and land | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	17,349
Year four	0
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Amortized Cost Basis Converted to Term	0
Total loans, gross	17,349
Real estate loans: | Construction and land | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	70	0
Year four	0	0
Year five	0	689
Prior	24	44
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	94	733
Consumer loans: | Manufactured homes
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	9,396	13,811
Year two	12,522	8,004
Year three	7,039	4,365
Year four	3,822	2,182
Year five	1,816	2,161
Prior	6,385	5,562
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	40,980	36,085
Consumer loans: | Manufactured homes | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	9,396	13,696
Year two	12,095	7,958
Year three	7,039	4,365
Year four	3,822	2,160
Year five	1,816	2,075
Prior	6,180	5,498
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	40,348	35,752
Consumer loans: | Manufactured homes | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	115
Year two	427	46
Year three	0	0
Year four	0	22
Year five	0	86
Prior	205	64
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	632	333
Consumer loans: | Floating homes
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	20,587	8,779
Year two	6,395	21,555
Year three	18,575	26,196
Year four	23,902	6,471
Year five	6,059	1,865
Prior	10,472	9,867
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	85,990	74,733
Consumer loans: | Floating homes | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	20,587	8,779
Year two	6,395	21,555
Year three	16,225	26,196
Year four	23,902	6,471
Year five	6,059	1,865
Prior	10,472	9,867
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	83,640	74,733
Consumer loans: | Floating homes | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	2,350
Year four	0
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Amortized Cost Basis Converted to Term	0
Total loans, gross	2,350
Consumer loans: | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,273	4,629
Year two	3,297	1,845
Year three	622	3,884
Year four	3,616	5,883
Year five	5,387	598
Prior	1,925	2,237
Revolving Loans Amortized Cost Basis	618	539
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	17,738	19,615
Consumer loans: | Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2,273	4,629
Year two	3,297	1,845
Year three	622	3,884
Year four	3,615	5,883
Year five	5,387	598
Prior	1,925	2,237
Revolving Loans Amortized Cost Basis	618	539
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	17,737	19,615
Consumer loans: | Other consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0
Year two	0
Year three	0
Year four	1
Year five	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Amortized Cost Basis Converted to Term	0
Total loans, gross	1
Commercial business
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	352	3,115
Year two	1,256	490
Year three	1,811	3,768
Year four	3,032	400
Year five	257	227
Prior	3,906	5,848
Revolving Loans Amortized Cost Basis	5,050	6,894
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	15,664	20,742
Commercial business | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	314	987
Year two	1,256	437
Year three	1,811	3,564
Year four	3,032	400
Year five	257	227
Prior	3,895	5,848
Revolving Loans Amortized Cost Basis	4,862	6,854
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	15,427	18,317
Commercial business | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	38	2,128
Year two	0	53
Year three	0	204
Year four	0	0
Year five	0	0
Prior	11	0
Revolving Loans Amortized Cost Basis	188	40
Revolving Loans Amortized Cost Basis Converted to Term	0	0
Total loans, gross	$ 237	$ 2,425