Income Taxes (Significant Components Of The Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 2,630	$ (9,980)	$ 5,571
State	822	(487)	1,540
Foreign	2,460	1,583	1,339
Total current	5,912	(8,884)	8,450
Deferred:
Federal	(1,559)	2,555	(12,016)
State	17	706	(2,014)
Foreign	(441)	114	(552)
Total deferred	(1,983)	3,375	(14,582)
Total income tax expense (benefit)	$ 3,929	$ (5,509)	$ (6,132)