Derivatives and Hedging Activities (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012 Derivatives designated as cash flow hedging instruments [Member]	Sep. 30, 2011 Derivatives designated as cash flow hedging instruments [Member]	Sep. 30, 2012 Derivatives designated as cash flow hedging instruments [Member]	Sep. 30, 2011 Derivatives designated as cash flow hedging instruments [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward Contracts [Member] Derivatives designated as cash flow hedging instruments [Member]	Dec. 31, 2011 Foreign Exchange Forward Contracts [Member] Derivatives designated as cash flow hedging instruments [Member]	Sep. 30, 2012 Foreign Exchange Forward Contracts [Member] Not Designated as Hedging Instrument [Member]	Dec. 31, 2011 Foreign Exchange Forward Contracts [Member] Not Designated as Hedging Instrument [Member]
Derivatives and Hedging Activities (Textual) [Abstract]
Notional principal amount of Hedging Contracts									$ 6,150	$ 8,350	$ 2,490	$ 0
Gain (loss) recognized in income, net	$ 82	$ 41	$ 222	$ 283	$ 5	$ 0	$ 17	$ 284