Derivative Instruments Gain (Loss) Hedging Relationship, Income Statement (Details) (Foreign Exchange Contract [Member], USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Derivative maturity period			90 days or less
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income (OCI) on Derivative (Effective Portion) Net	$ (2,856)	$ 0	$ (3,026)	$ 0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | General and Administrative Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	54	0	120	0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest income and other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income Derivative (Ineffective portion and Amount Excluded from Effectiveness Testing)	383	0	1,496	0
Not Designated as Hedging Instrument [Member] | Interest income and other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ (2,585)	$ 3,983	$ (1,061)	$ 2,088
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative maturity period			twelve months or less