Financial Instruments and Risk Management (Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations Derivatives in Cash Flow Hedging Relationships) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Amount of Gain or (Loss) Recognized in AOCE (Net of Tax) on Derivative (Effective Portion)	$ 869	$ (8,719)	$ 4,578	$ 178
Amount of Gain or (Loss) Reclassified from AOCE into Earnings (Effective Portion)	1,215	(5,803)	178	(21,479)
Amount of Gain or (Loss) Excluded from the Assessment of Hedge Effectiveness	5,054	1,250	5,088	1,250
Foreign Currency Forward Contracts [Member]
Amount of Gain or (Loss) Recognized in AOCE (Net of Tax) on Derivative (Effective Portion)	301	(7,748)	1,689	(2,863)
Foreign Currency Forward Contracts [Member] | Net Revenues [Member]
Amount of Gain or (Loss) Reclassified from AOCE into Earnings (Effective Portion)	1,622	468	2,367	879
Foreign Currency Forward Contracts [Member] | Other Income (Expenses) , Net [Member]
Amount of Gain or (Loss) Excluded from the Assessment of Hedge Effectiveness	5,054	1,250	5,088	1,250
Interest Rate Swaps [Member]
Amount of Gain or (Loss) Recognized in AOCE (Net of Tax) on Derivative (Effective Portion)	568	(971)	2,889	3,041
Interest Rate Swaps [Member] | Interest Expense [Member]
Amount of Gain or (Loss) Reclassified from AOCE into Earnings (Effective Portion)	$ (407)	$ (6,271)	$ (2,189)	$ (22,358)