Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.19.1
SUBSEQUENT EVENTS (Details) - USD ($)
3 Months Ended
Apr. 18, 2019
Mar. 31, 2019
Mar. 31, 2018
Subsequent Event [Line Items]      
Cash consideration   $ 8,122,000 $ 5,107,000
VEN Bakken LLC | Subsequent Event      
Subsequent Event [Line Items]      
Cash consideration $ 165,000,000.0    
Number of shares issued (in shares) 5,602,147    
VEN Bakken LLC | Subsequent Event | Senior Unsecured Notes      
Subsequent Event [Line Items]      
Debt issued $ 130,000,000.0    
Interest rate 6.00%