Derivative Financial Instruments Derivative Financial Instruments (Details 2) (Level 2, Foreign currency forward contracts, Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 619	$ 392
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 2,328	$ 613