Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Financial Instruments - Cash Flow Hedge Impact on AOCI (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Derivative        
Cost of goods sold $ (319,703) $ (289,270) $ (934,088) $ (821,342)
Interest (expense) income (28,238) (49,079) (84,622) (144,041)
Gain (loss) on cash flow hedging relationships | Amount of gain (loss) reclassified from AOCI into income        
Derivative        
Cost of goods sold (30) (94) (101) (104)
Interest (expense) income $ (71) $ (13) $ (164) $ (22)