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EQUITY BASED COMPENSATION (Details) - $ / shares
3 Months Ended
Mar. 31, 2017
May 05, 2017
Apr. 26, 2017
EQUITY-BASED COMPENSATION      
Vesting period 3 years    
Share Price $ 20.00    
Minimum      
EQUITY-BASED COMPENSATION      
Equity options term 7 years    
Maximum      
EQUITY-BASED COMPENSATION      
Equity options term 10 years    
Class A common stock | IPO      
EQUITY-BASED COMPENSATION      
Share Price   $ 14.00 $ 14.00
2016 plan | Maximum      
EQUITY-BASED COMPENSATION      
Equity options term 10 years    
2016 plan | Class A common stock      
EQUITY-BASED COMPENSATION      
Maximum number of shares 4,600,000    
2016 plan | Class A common stock | Over-allotment option      
EQUITY-BASED COMPENSATION      
Percentage of common stock sold in underwritten public offering 8.00%    
Phantom Equity Awards      
EQUITY-BASED COMPENSATION      
Cash payment (per phantom unit)   $ 5.53