Commitments and Contingencies - Commitment (Details) - Commitments to Extend Credit - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 558,631	$ 528,231
REAL ESTATE LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	332,378	345,786
Commercial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	787	1,293
Construction and development
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	182,297	143,666
One-to-four-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	78,264	147,712
Home equity.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	67,596	52,457
Multi-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	3,434	658
CONSUMER LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	35,873	23,365
COMMERCIAL BUSINESS LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	190,380	159,080
Commercial and industrial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	126,220	106,171
Warehouse lending
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 64,160	$ 52,909