Derivatives Balance Sheet Location (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 3,171	$ 520
Other Current Assets | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,054	373
Other Current Assets | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	117	147
Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	2,744	2,526
Accrued Expenses | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	2,568	921
Accrued Expenses | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 176	$ 1,605