Derivatives and Hedging (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	$ (2,525)	$ (282)	$ (2,440)	$ 2,418
After-tax amount of gain (loss) reclassified from AOCI into earnings	(531)	717	(599)	421
Commodity contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	1	(220)	32	392
Foreign currency contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	(2,526)	(62)	(2,472)	2,026
Corporate general and administrative expense | Foreign currency contracts
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Earnings	326	5,875	4,145	(7,698)
Total Cost of revenue | Commodity contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	13	708	60	944
Total Cost of revenue | Foreign currency contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	(282)	271	(135)	1
Interest expense | Interest rate contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	$ (262)	$ (262)	$ (524)	$ (524)