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Employee Benefits (Schedule of plan's funded status and amounts recognized in consolidated statement of financial condition) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Employee Benefits    
Projected and accumulated benefit obligation $ (17,342) $ (17,138)
Plan assets at fair value 16,501 16,906
Funded status included in accrued expenses and other liabilities $ (841) $ (232)