Employee Benefits (Schedule of plan's funded status and amounts recognized in consolidated statement of financial condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee Benefits
Projected and accumulated benefit obligation	$ (17,138)	$ (23,055)	$ (23,964)
Plan assets at fair value	16,906	22,839	$ 22,634
Funded status included in accrued expenses and other liabilities	$ (232)	$ (216)