Leases (Summary Of Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Amortization of property and equipment	$ 137	$ 154
Interest expense on finance leases	25	29
Total finance lease expense	162	183
Operating lease expense	1,920	1,758
Sublease income	(92)	(124)
Total lease expense	$ 1,990	$ 1,817