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BUSINESS COMBINATIONS - Narrative (Details) € in Millions, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 18, 2018 USD ($) | Jan. 18, 2018 EUR (€) | Jul. 02, 2017 USD ($) | Jul. 02, 2017 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 EUR (€)
Liteq B.V. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase price |  |  | $ 28.6 | € 25.0 |  |
Percentage of voting interests acquired |  |  |  |  | 100.00% | 100.00%
Assembléon [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase price |  |  |  |  | $ 97.4 | € 80.0
Escrow deposit release | $ 5.0 | € 4.2 |  |  |  |
Equity [Member] | Assembléon [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase price |  |  |  |  | 72.5 |
Intercompany Loans [Member] | Assembléon [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase price |  |  |  |  | $ 24.9 |

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