Income Taxes (Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal, Current - US	$ (232)	$ 705	$ 3,916
Foreign, Current	10,823	11,023	10,455
State, Current - US	(275)	56	1,244
Total current	10,316	11,784	15,615
Federal, Deferred (prepaid) - US	(8,992)	2,618	(967)
Foreign, Deferred (prepaid)	(3,328)	(887)	(1,594)
State, Deferred (prepaid) - US	1,583	(950)	(179)
Total deferred (benefit)	(10,737)	781	(2,740)
Total provision (benefit) for income taxes	$ (421)	$ 12,565	$ 12,875