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SUBSEQUENT EVENTS (Details) - Subsequent Events - USD ($) $ in Millions | Oct. 31, 2019 | Oct. 01, 2019
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BTY |  |
Subsequent Event [Line Items] |  |
Percentage of interest acquired |  | 49.00%
Initial lock-up period |  | 5 years
Second lock-up period |  | 3 years
BTY | Call Option | Minimum |  |
Subsequent Event [Line Items] |  |
Percentage of interest acquired |  | 26.00%
BTY | Call Option | Maximum |  |
Subsequent Event [Line Items] |  |
Percentage of interest acquired |  | 31.00%
Noble |  |
Subsequent Event [Line Items] |  |
Percentage of interest acquired | 100.00% |
Cost of acquired entity | $ 62.0 |
Noble | Earn-out Provision |  |
Subsequent Event [Line Items] |  |
Measurement period | 5 years |
Noble | Maximum | Earn-out Provision |  |
Subsequent Event [Line Items] |  |
Cost of acquired entity | $ 31.3 |

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