Loans and Allowance for Credit Losses - Aging of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Loans and Allowance for Credit Losses
Loans	$ 652,193	$ 640,480
Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	145,977	139,034
Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans	72,908	67,755
Residential portfolio segment \| Multifamily
Loans and Allowance for Credit Losses
Loans	49,887	36,805
Construction \| 1-4 Family Residential Construction
Loans and Allowance for Credit Losses
Loans	17,583	15,245
Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans	44,915	75,811
Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans	201,484	184,706
Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans	62,652	62,718
Commercial portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans		58,406
Consumer portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans	56,787	58,406
30-59 Days Past Due
Loans and Allowance for Credit Losses
Loans	2,296	2,929
30-59 Days Past Due \| Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	1,505	1,758
30-59 Days Past Due \| Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans	198	269
30-59 Days Past Due \| Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans	24	98
30-59 Days Past Due \| Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans	202	252
30-59 Days Past Due \| Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans	23	80
30-59 Days Past Due \| Consumer portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans	344	472
60-89 Days Past Due
Loans and Allowance for Credit Losses
Loans	530	1,538
60-89 Days Past Due \| Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	365	205
60-89 Days Past Due \| Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans	122	202
60-89 Days Past Due \| Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans		25
60-89 Days Past Due \| Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans		1,027
60-89 Days Past Due \| Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans		25
60-89 Days Past Due \| Consumer portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans	43	54
90 Days or More Past Due
Loans and Allowance for Credit Losses
Loans	1,405	1,678
90 Days or More Past Due \| Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	688	828
90 Days or More Past Due \| Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans		148
90 Days or More Past Due \| Construction \| 1-4 Family Residential Construction
Loans and Allowance for Credit Losses
Loans	93	90
90 Days or More Past Due \| Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans	69	59
90 Days or More Past Due \| Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans	415	413
90 Days or More Past Due \| Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans	140	140
Total Past Due
Loans and Allowance for Credit Losses
Loans	4,231	6,145
Total Past Due \| Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	2,558	2,791
Total Past Due \| Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans	320	619
Total Past Due \| Construction \| 1-4 Family Residential Construction
Loans and Allowance for Credit Losses
Loans	93	90
Total Past Due \| Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans	93	182
Total Past Due \| Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans	617	1,692
Total Past Due \| Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans	163	245
Total Past Due \| Consumer portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans	387	526
Current
Loans and Allowance for Credit Losses
Loans	647,962	634,335
Current \| Residential portfolio segment \| 1-4 Family Residential Mortgage
Loans and Allowance for Credit Losses
Loans	143,419	136,243
Current \| Residential portfolio segment \| Home Equity And Second Mortgage
Loans and Allowance for Credit Losses
Loans	72,588	67,136
Current \| Residential portfolio segment \| Multifamily
Loans and Allowance for Credit Losses
Loans	49,887	36,805
Current \| Construction \| 1-4 Family Residential Construction
Loans and Allowance for Credit Losses
Loans	17,490	15,155
Current \| Construction \| Other Construction, Development and Land
Loans and Allowance for Credit Losses
Loans	44,822	75,629
Current \| Commercial portfolio segment \| Commercial Real Estate
Loans and Allowance for Credit Losses
Loans	200,867	183,014
Current \| Commercial portfolio segment \| Commercial Business
Loans and Allowance for Credit Losses
Loans	62,489	62,473
Current \| Consumer portfolio segment \| Consumer and Other
Loans and Allowance for Credit Losses
Loans	$ 56,400	$ 57,880