Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 684	$ 1,870
Short-term lease cost	19	50
Variable lease cost	112	269
Total lease cost	$ 815	$ 2,189