Financial Instruments - Income Statement Location (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) $ (345) $ 1,345 $ (1,478) $ 2,365
Designated as Hedging Instrument | Commodity Contract | Cost of goods sold        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) (1,152) 585 (3,533) 564
Designated as Hedging Instrument | Foreign Exchange Forward | Revenue/Cost of goods sold        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) (601) 771 (844) 1,381
Designated as Hedging Instrument | Foreign Exchange Forward | Other income, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) (369) (94) (809) 17
Designated as Hedging Instrument | Economic interests in loans | Revenue        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) 2,137 0 4,702 0
Not Designated as Hedging Instrument | Commodity Contract | Cost of goods sold        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) (85) (69) (180) 209
Not Designated as Hedging Instrument | Commodity Contract | Realized and unrealized (loss) gain on derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) (275) 168 (814) 273
Not Designated as Hedging Instrument | Interest Rate Swap | Interest expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) $ 0 $ (16) $ 0 $ (79)