Loans Receivable and Allowance for Credit Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 17	$ 82	$ 25	$ 97
Year 2024
Impaired Financing Receivable 1 [Line Items]
Charge offs	14		14
Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs		12	5	27
Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		13		13
Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	57	6	57
One- to four-family residential mortgages
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	67	5	67
One- to four-family residential mortgages | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		10		10
One- to four-family residential mortgages | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	57	5	57
Loans on deposit accounts
Impaired Financing Receivable 1 [Line Items]
Charge offs	14		17
Loans on deposit accounts | Year 2024
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 14		14
Loans on deposit accounts | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs			3
Consumer and other
Impaired Financing Receivable 1 [Line Items]
Charge offs		15	3	30
Consumer and other | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs		12	2	27
Consumer and other | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		$ 3		$ 3
Consumer and other | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs			$ 1