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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 02, 2017 | Dec. 31, 2017 | Dec. 31, 2015 | Dec. 31, 2009 | Dec. 31, 2016 | Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible Assets Including Goodwill Acquired |  | $ 537,148 | $ 13,330 |  |  |
Gross amount |  |  | 23,030 |  | $ 23,030 | $ 29,166
Impairment charges |  |  | 12,939 |  |  |
Excess purchase price over fair value of net assets acquired assigned to goodwill |  | $ 102,003 |  |  | $ 47,148 |
Minimum |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Economic Useful Life |  | 1 year |  |  |  |
Maximum |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Economic Useful Life |  | 15 years |  |  |  |
Australian Acquiree |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Economic Useful Life |  |  |  | 30 years |  |
Impairment charges |  |  | $ 12,939 |  |  |
Novae |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Finite lived other intangible assets | $ 385,405 |  |  |  |  |
Value of business acquired | $ 257,000 |  |  |  |  |
Weighted average useful life | 7 years |  |  |  |  |
Indefinite lived intangible assets | $ 94,748 |  |  |  |  |
Excess purchase price over fair value of net assets acquired assigned to goodwill | 54,047 |  |  |  |  |
Contessa Limited |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Excess purchase price over fair value of net assets acquired assigned to goodwill |  | $ 1,000 |  |  |  |
Distribution networks | Novae |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Finite lived other intangible assets | $ 128,463 |  |  |  |  |
VOBA - Novae |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Gross amount |  | 256,942 |  |  |  |
VOBA - Novae | Novae |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted average useful life | 4 years |  |  |  |  |
Other Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Gross amount |  | $ 2,140 |  |  |  |
Other Intangible Assets | Novae |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted average useful life | 13 years |  |  |  |  |

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