Income Taxes (Reconciliatoin Of The Unrecognized Tax Benefits Rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of the beginning and ending balance of unrecognized tax benefits
Beginning balance	$ 1,847	$ 2,164
Additions for current year tax positions	325	339
Additions for prior year tax positions	226	196
Decreases related to lapse of applicable statute of limitation	(509)	(852)
Ending balance	$ 1,889	$ 1,847