Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease expense	$ 1,537	$ 3,015
Finance lease expense:
Amortization of right-of-use assets	29	61
Interest on lease liabilities	8	11
Total finance lease expense	37	72
Short-term lease expense	401	539
Variable lease expense	$ 1,085	$ 1,766