Derivatives and Other Financial Instruments - Gross fair market value of all derivative instruments, which are not designated as hedging instruments (Details) (Foreign Currency Exchange Contracts, Not designated as hedging instrument, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative asset fair value gross asset		$ 16
Derivative liability fair value gross asset	1
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset fair value gross asset		16
Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liability fair value gross asset	$ 1