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REVENUE RECOGNITION, Adoption of ASC Topic 606 (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Adoption of ASC Topic 606 [Abstract]          
Revenues $ (704,190) $ (550,101) $ (1,320,409) $ (1,049,200)  
ASC Topic 606 [Member]          
Adoption of ASC Topic 606 [Abstract]          
Cumulative impact on opening retained earnings         $ 11,200
Impact of Adopting ASC Topic 606 [Member] | ASC Topic 606 [Member]          
Adoption of ASC Topic 606 [Abstract]          
Revenues $ (600)   $ (1,200)