Derivatives Balance Sheet Location (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 1,140	$ 789
Other Current Assets | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	740	414
Other Current Assets | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	400	375
Other Current Assets | Interest rate swaps | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	3,609	1,212
Accrued Expenses | Foreign currency forward contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	825	1,195
Accrued Expenses | Foreign currency forward contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	2,784	5
Accrued Expenses | Interest rate swaps | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0	$ 12