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EARNINGS PER UNIT - Computations of Net Income (Loss) Per Unit (Additional Information) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
shares
Sep. 30, 2019
shares
Sep. 30, 2020
shares
Sep. 30, 2019
shares
Performance Share Awards        
Earnings Per Share [Line Items]        
Antidilutive securities excluded from earnings per share computation (in shares) 0 0 0 0
Performance Share Awards        
Earnings Per Share [Line Items]        
Exchange ratio     1  
Vesting period     10 years  
OCGH Units        
Earnings Per Share [Line Items]        
Exchange ratio     1  
OCGH Issued (in shares) 0 0 0 0
OCGH Units | Performance Share Awards        
Earnings Per Share [Line Items]        
Vesting period     10 years  
OCGH Units | Performance Share Awards | Minimum        
Earnings Per Share [Line Items]        
Vesting period     4 years  
OCGH Units | Performance Share Awards | Maximum        
Earnings Per Share [Line Items]        
Vesting period     10 years  
Class A Units        
Earnings Per Share [Line Items]        
Exchange ratio     1  
OCGH Issued (in shares)   0   0