Mortgage Banking Derivatives - Schedule of Mortgage Banking Derivatives Included in Statements of Financial Condition (Details) - Mortgage Banking - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 51,445,000	$ 43,585,000
Derivative, fair value	347,000	439,000
IRLs
Derivatives, Fair Value [Line Items]
Derivative, notional amount	14,445,000	15,085,000
Derivative, fair value	451,000	363,000
Forwards
Derivatives, Fair Value [Line Items]
Derivative, notional amount	37,000,000	28,500,000
Derivative, fair value	$ (104,000)	$ 76,000