Derivative Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Designated as Hedging Instrument [Member]
Foreign Exchange Forward Contract Derivatives in cash flow hedging relationships:
Gains recognized in OCI (a)	$ 223		$ 223
Losses recognized in OCI (a)	(115)	(204)	(225)	(138)
Gain recognized from accumulated OCI into net loss (b)		139		674
Losses recognized from accumulated OCI into net loss (b)	(283)		(464)
Gains recognized in net loss (c)				49
Losses recognized in net loss (c)		(6)	(5)
Foreign Exchange Forward Contract Derivatives not designated as hedging relationships:
Gains recognized in net loss (d)				49
Losses recognized in net loss (c)		(6)	(5)
Not Designated as Hedging Instrument [Member]
Foreign Exchange Forward Contract Derivatives in cash flow hedging relationships:
Gains recognized in net loss (c)	47		117
Losses recognized in net loss (c)			(17)
Foreign Exchange Forward Contract Derivatives not designated as hedging relationships:
Gains recognized in net loss (d)	47		117
Losses recognized in net loss (c)			$ (17)