Derivative Instruments And Hedging Activities Location of Gain Loss in Income Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Economic Hedges, Net	$ (24,572)	$ 1,531	$ (24,594)	$ 30,130
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Economic Hedges, Net	(24,432)	1,839	(24,406)	35,431
Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Economic Hedges, Net	$ (140)	$ (308)	$ (188)	$ (5,301)