Financial Instruments (Details 2) (Foreign currency forward contracts, net [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets:
Derivative Assets	$ 6,225	$ 0
Liabilities:
Derivative Liability	0	(240)
Level 1 [Member]
Assets:
Derivative Assets	0
Liabilities:
Derivative Liability	0
Level 2 [Member]
Assets:
Derivative Assets	6,225
Liabilities:
Derivative Liability	0
Level 3 [Member]
Assets:
Derivative Assets	0
Liabilities:
Derivative Liability	$ 0