Employee Benefits (Schedule of plan's funded status and amounts recognized in consolidated statement of financial condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Benefits
Projected and accumulated benefit obligation	$ (17,868)	$ (17,138)	$ (23,055)
Plan assets at fair value	18,062	16,906	$ 22,839
Funded status included in accrued expenses and other liabilities	$ 194	$ (232)