Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Schedule of Debt (Details)

v3.19.3
LONG-TERM DEBT - Schedule of Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Principal Balance $ 1,145,491 $ 835,140
Unamortized Net Discount 9,558 13,237
Debt Issuance Costs, Net (14,977) (18,173)
Long-term Debt, Net 1,140,072 830,203
Revolving Credit Facility    
Debt Instrument [Line Items]    
Principal Balance 327,000 140,000
Unamortized Net Discount 0 0
Debt Issuance Costs, Net 0 0
Long-term Debt, Net 327,000 140,000
Revolving Credit Facility | Other Noncurrent Assets, Net    
Debt Instrument [Line Items]    
Debt Issuance Costs, Net (4,400) (5,100)
Second Lien Notes due 2023    
Debt Instrument [Line Items]    
Principal Balance 688,491 695,140
Unamortized Net Discount 10,814 13,237
Debt Issuance Costs, Net (14,817) (18,173)
Long-term Debt, Net 684,488 $ 690,203
Unsecured VEN Bakken Note    
Debt Instrument [Line Items]    
Principal Balance 130,000  
Unamortized Net Discount (1,256)  
Debt Issuance Costs, Net (160)  
Long-term Debt, Net $ 128,584