Loans Receivable and Allowance for Credit Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 157	$ 62
Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	79
Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs	16
Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	62
One- to four-family residential
Impaired Financing Receivable 1 [Line Items]
Charge offs	75
One- to four-family residential | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs	13
One- to four-family residential | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	62
Loans on Deposit Accounts
Impaired Financing Receivable 1 [Line Items]
Charge offs	78
Loans on Deposit Accounts | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	78
Consumer and other
Impaired Financing Receivable 1 [Line Items]
Charge offs	4
Consumer and other | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	1
Consumer and other | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 3