v3.8.0.1
INTANGIBLE ASSETS Table 1 - Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Intangible Assets [Line Items]    
Cost $ 866,309 $ 169,309
Accumulated Amortization $ (81,830) (42,226)
Customer relationships    
Intangible Assets [Line Items]    
Finite-Lived intangible asset, useful life 18 years  
Cost $ 863,950 166,950
Accumulated Amortization $ (81,136) (41,582)
Other    
Intangible Assets [Line Items]    
Finite-Lived intangible asset, useful life 47 years  
Cost $ 2,359 2,359
Accumulated Amortization $ (694) $ (644)