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STOCK-BASED COMPENSATION - Equity Compensation Plan - Additional Information (Details) - Equity Compensation Plan [Member]
6 Months Ended
Jun. 30, 2017
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares authorized (in shares) 10,500,000
Number of shares available for grant (in shares) 2,521,173
Compensation plan extended term description Extended the term of the plan through 2024
Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expiration term (in years) 10 years