Nonaccrual Loans (Details) - Nonperforming - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	$ 12,113	$ 11,481
One-to-four family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	4,600	4,892
Multifamily
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	109	515
Commercial real estate
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	6,170	4,601
Business
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	1,234	1,448
Consumer
Financing Receivable, Past Due [Line Items]
Financing Receivable, Nonaccrual	$ 0	$ 25