Income Taxes (Income Before Income Tax Domestic And Foreign Components Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Domestic	$ (151,027)	$ (55,061)	$ 30,766
Foreign	3,858	4,484	8,294
(Loss) income before income taxes	$ (147,169)	$ (50,577)	$ 39,060