Loans Receivable - Financing Receivables, Summary of loans by type and payment activity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,200,778	$ 1,182,310
Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		1,182,159
Property total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,200,778
Property total | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		1,182,159
Property total | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,200,577
Property total | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		1,181,966
Property total | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	201
Property total | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		193
One-to-Four Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	482,660
One-to-Four Family Residential | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		475,836
One-to-Four Family Residential | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	482,660
One-to-Four Family Residential | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		475,836
One-to-Four Family Residential | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0
One-to-Four Family Residential | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	143,332	126,866
Multifamily | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		126,895
Multifamily | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	143,332
Multifamily | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		126,895
Multifamily | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0
Multifamily | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	408,905	407,904
Commercial real estate | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		407,882
Commercial real estate | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	408,905
Commercial real estate | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		407,882
Commercial real estate | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0
Commercial real estate | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0
Construction Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	63,603	77,644
Construction Land Development | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		78,120
Construction Land Development | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	63,603
Construction Land Development | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		78,120
Construction Land Development | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0
Construction Land Development | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0
Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	31,659	31,363
Business | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		31,371
Business | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	31,659
Business | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		31,371
Business | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans
Business | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	70,619
Consumer | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		62,055
Consumer | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	70,418
Consumer | Performing | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		61,862
Consumer | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	201
Consumer | Nonperforming | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		193
Permanent owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	242,477	232,869
Permanent owner occupied | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		233,785
Permanent owner occupied | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	242,500	233,800
Permanent non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	240,183	241,311
Permanent non-owner occupied | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		242,051
Permanent non-owner occupied | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 240,200	$ 242,100