Derivatives (Details Textual) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended				1 Months Ended			1 Months Ended		1 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011	Oct. 31, 2012 Forward Contracts [Member]	Jan. 31, 2012 Forward Contracts [Member]	Sep. 30, 2012 Forward Contracts [Member]	Dec. 31, 2011 Forward Contracts [Member]	Oct. 31, 2012 Forward Contracts [Member] Gain (Loss) on Settlement of Derivative Instrument [Member]	Jan. 31, 2012 Forward Contracts [Member] Gain (Loss) on Settlement of Derivative Instrument [Member]	Dec. 31, 2011	Jan. 31, 2012 Forward Contracts [Member]	Dec. 31, 2011 Forward Contracts [Member]	Jan. 31, 2012 Forward Contracts [Member] Gain (Loss) on Settlement of Derivative Instrument [Member]
Derivatives (Textual) [Abstract]
Net pre-tax gain(loss) in foreign currency exchange contracts	$ 100,000	$ (600,000)	$ (100,000)	$ (100,000)
Futures contract notional value					6,000,000	6,500,000							10,000,000
Futures contract forward rate					1.2972	1.3091							6.353
Loss on this contract included in other accrued expenses									55,000	67,000
Gain (loss) on future contracts							291,000	(58,000)			236,000	(125,000)		13,000		59,000
Gain on future contracts included in prepaid expenses and other current assets															$ 46,000