Derivatives and Hedging - Gains (Losses) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	$ (3,260)	$ (2,151)	$ (2,536)
After-tax amount of gain (loss) reclassified from AOCI into earnings	(2,959)	(839)	(3,854)
Commodity contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	(728)	(881)	265
Commodity contracts | Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	(385)	(59)	50
Foreign currency contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	(2,532)	(1,270)	(2,801)
Foreign currency contracts | Corporate general and administrative expense
Derivative Instruments, Gain (Loss)
Pre-tax net gains (losses) recognized in earnings associated with hedging instruments designated as fair value hedges	(5,191)	(3,322)	2,885
Foreign currency contracts | Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	(1,525)	269	(2,855)
Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	$ (1,049)	$ (1,049)	$ (1,049)