Derivatives - Contracts Held (Details) (Not Designated as Hedging Instrument [Member], Foreign Exchange Forward [Member])	12 Months Ended
	Dec. 31, 2012 Euro January 18, 2013 [Member] USD ($)		Dec. 31, 2011 Euro January 20, 2012 [Member] USD ($)		Dec. 31, 2011 USD January 13, 2012 [Member] USD ($)		Dec. 31, 2011 USD January 13, 2012 [Member] CNY
Derivative [Line Items]
Derivative, Notional Amount	$ 5,000,000		$ 6,500,000		$ 10,000,000
Derivative, Forward Exchange Rate	1.3228		1.3091				6.353
Gain (Loss) Recorded at Balance Sheet Date	$ (13,000)	[1]	$ (67,000)	[1]	$ 46,000	[1]

[1] Gains on futures contracts are recorded in prepaid expenses and other current assets. Losses on futures contracts are recorded in other accrued expenses.