Loans - Schedule of Investment in Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 2,486	$ 5,552
Real estate loans: | One-to-four family
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,960	2,207
Real estate loans: | Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	133	140
Real estate loans: | Commercial and multifamily
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	2,380
Real estate loans: | Construction and land
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	29	33
Consumer loans: | Manufactured homes
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	99	122
Consumer loans: | Floating homes
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	493
Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	265	0
Commercial business loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 176