REVENUE RECOGNITION - Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2018 |
|
| Revenue from Contract with Customer [Abstract] | ||
| Receivables, which are included in trade and other receivables, net | $ 128,672 | $ 74,196 |
| Contract liabilities | 2,692 | $ 2,642 |
| Contract Liabilities | ||
| Revenue recognized that was included in the contract liability balance at the beginning of the period | (1,006) | |
| Increases due to cash received, excluding amounts recognized as revenue during the period | $ 1,056 |