Financial Instruments Income Statement Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ 1,908	$ (1,469)	$ 742	$ (1,500)
Designated as Hedging Instrument | Commodity Contract | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	893	(783)	(21)	(909)
Designated as Hedging Instrument | Foreign Exchange Forward | Revenues/Costs of sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	610	0	610	0
Designated as Hedging Instrument | Foreign Exchange Forward | Other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	111	0	111	0
Not Designated as Hedging Instrument | Commodity Contract | Realized and unrealized (gain) loss on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	312	(606)	105	(466)
Not Designated as Hedging Instrument | Interest Rate Swap | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ (18)	$ (80)	$ (63)	$ (125)