Loans - Narrative (Details)	Sep. 30, 2025 USD ($) loan	Dec. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable on loans receivable	$ 3,700,000	$ 3,400,000
Commitments to extend additional credit to borrowers whose loan terms have been modified in TDRs	0
Loans classified as TDRs	$ 1,100,000	$ 1,300,000
Real estate loans: | One-to-four family:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in process of foreclosure | loan	3
Mortgage loans in process of foreclosure, amount	$ 186,000