Borrowings, FHLB Stock and Subordinated Notes - Schedule of Borrowing Capacity from the FHLB (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Advance equivalent of collateral:	$ 901,827	$ 896,160
FHLB of Des Moines
Line of Credit Facility [Line Items]
Amount available to borrow under credit facility	385,366	463,541
Loans pledged as collateral for borrowings	333,613	344,572
Remaining FHLB borrowing capacity	172,327	181,360
FHLB of Des Moines | Irrevocable letters of credit
Line of Credit Facility [Line Items]
Notional amount of letters of credit outstanding	8,000	10,000
FHLB of Des Moines | One-to-four family mortgage loans | Asset Pledged as Collateral
Line of Credit Facility [Line Items]
Advance equivalent of collateral:	175,907	196,547
FHLB of Des Moines | Commercial and multifamily mortgage loans | Asset Pledged as Collateral
Line of Credit Facility [Line Items]
Advance equivalent of collateral:	29,180	34,464
FHLB of Des Moines | Home equity loans | Asset Pledged as Collateral
Line of Credit Facility [Line Items]
Advance equivalent of collateral:	$ 241	$ 348