Leases (Information Of Lease Right Of Use Asset And Lease Liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for operating lease liabilities	$ 6,074	$ 5,361
Right-of-use assets obtained in exchange for new operating lease obligations	$ 2,815	$ 5,225
Weighted-average remaining lease term	3 years 6 months 7 days	4 years 1 month 17 days
Weighted-average discount rate	5.64%	6.22%