Leases (Components Of Lease Expense) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 6,443
Finance lease expense:
Amortization of right-of-use assets	303
Interest on lease liabilities	44
Total finance lease expense	347
Short-term lease expense	697
Variable lease expense	$ 3,502