Fair Value Measurements (Fair Value of Assets (Liabilities)) (Details) - Level 2 - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other current assets | Foreign exchange options
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ 0	$ 1,792
Accrued expenses | Foreign exchange forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ 0	$ 14