Loans - Interest Income on Non-Accrual Loans, Excluding PCD Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	$ 153	$ 62	$ 411	$ 221
Real estate loans: | Multifamily
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	41	25	144	73
Real estate loans: | Commercial
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	63	26	183	108
Real estate loans: | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	1	0	6	10
Real estate loans: | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	0	5	1	16
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Total interest income on non-accrual loans	$ 48	$ 6	$ 77	$ 14