Financial Instruments (Changes in Level 3 Inputs) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liability Balance at Beginning of Period	$ 0	$ (75,637)	$ 0	$ (35,318)
Liability Balance at End of Period	0	115,910	0	115,910
Cost of Sales [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value recognized in other comprehensive income	0	(4,251)	0	(8,034)
Sales [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value recognized in other comprehensive income	0	6,202	(3,852)	80,476
Changes Measurement [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value recognized in other comprehensive income	0	178,511	3,852	65,816
Changes Measurement [Member] | Cost of Sales [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value recognized in other comprehensive income	$ 0	$ 11,085	$ 0	$ 12,970