Derivatives Balance Sheet Location (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 2,204	$ 520
Other Current Assets | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1,557	373
Other Current Assets | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	647	147
Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	2,235	2,526
Accrued Expenses | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	1,701	921
Accrued Expenses | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 534	$ 1,605