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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - case | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loss Contingencies [Line Items] |  |  |  |
Defined contribution match |  | 4.00% | 4.00% | 4.00%
Pending litigation claims, number (case) |  | 16 |  |
Subsequent Event |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Defined contribution match | 4.00% |  |  |

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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- Details
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