Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease expense	$ 5,864	$ 5,250	$ 6,443
Finance lease expense:
Amortization of right-of-use assets	128	165	303
Interest on lease liabilities	6	15	44
Total finance lease expense	134	180	347
Variable lease expense	$ 1,290	$ 1,476	$ 3,502