Property and Equipment, Net (Schedule of Depreciation and Amortization Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation	$ 12,602	$ 15,001	$ 15,067
Cost of sales
Property, Plant and Equipment [Line Items]
Depreciation	1,422	2,278	1,755
Selling, general and administrative expenses
Property, Plant and Equipment [Line Items]
Depreciation	$ 11,180	$ 12,723	$ 13,312