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REVENUE Shipping and Handling Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Cost of goods sold $ 1,704,100 $ 1,543,510 $ 3,318,066 $ 2,966,083
Shipping and Handling [Member]        
Cost of goods sold $ 18,600 $ 14,400 $ 36,800 $ 27,800