Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Unrecognized tax benefits — January 1	$ 157	$ 157	$ 442
Gross increases — tax positions in prior period
Gross decreases — tax positions in prior period			(285)
Unrecognized tax benefits — December 31,	$ 157	$ 157	$ 157