Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Cash Flow Hedge Impact on AOCI (Details)

v3.8.0.1
Financial Instruments - Cash Flow Hedge Impact on AOCI (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Derivative    
Cost of goods sold $ (288,076) $ (250,219)
Interest (expense) income (29,163) (46,785)
Gain (loss) on cash flow hedging relationships | Amount of gain (loss) reclassified from AOCI into income    
Derivative    
Cost of goods sold 28 18
Interest (expense) income $ (35) $ (2)