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) |