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ACQUISITIONS (Details) - USD ($) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2015 | Dec. 31, 2014
Assets |  |  |
Goodwill | $ 358,865 | $ 310,240 | $ 329,741
Bapco |  |  |
Acquisitions |  |  |
Percentage of interest acquired | 20.00% |  |
Payment to acquire business | $ 5,200 |  |

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