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GOODWILL AND OTHER INTANGIBLE ASSETS - Components of Company's Identifiable Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2016 | Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Cost | $ 1,410,853 |  | $ 1,416,615
Accumulated Amortization | (289,008) |  | (256,988)
Net | 1,121,845 |  | 1,159,627
Trade Names |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Cost | 162,900 |  | 162,900
Net | $ 162,900 |  | 162,900
In Process Research and Development |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Other indefinite-lived intangible assets |  |  | 1,000
Completed technology |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 19 years | 19 years |
Cost | $ 865,467 |  | 869,174
Accumulated Amortization | (146,727) |  | (124,096)
Net | $ 718,740 |  | 745,078
Customer relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 13 years | 13 years |
Cost | $ 232,312 |  | 233,430
Accumulated Amortization | (98,919) |  | (91,961)
Net | $ 133,393 |  | 141,469
Trademarks/brand names |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 28 years | 28 years |
Cost | $ 104,398 |  | 104,879
Accumulated Amortization | (23,956) |  | (22,293)
Net | $ 80,442 |  | 82,586
Supplier relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 27 years | 27 years |
Cost | $ 34,721 |  | 34,721
Accumulated Amortization | (15,805) |  | (15,092)
Net | $ 18,916 |  | 19,629
All other |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 4 years | 4 years |
Cost | $ 11,055 |  | 11,511
Accumulated Amortization | (3,601) |  | (3,546)
Net | $ 7,454 |  | $ 7,965

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