Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE - Assets and Liabilities Accounted For At Fair Value On A Recurring Basis (Details)

v3.19.3
FAIR VALUE - Assets and Liabilities Accounted For At Fair Value On A Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent Consideration – Current Liabilities $ (10,058) $ (58,069)
Debt Exchange Derivatives – Current Liabilities 0 (18,183)
Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Derivatives – Current Asset (crude oil price and basis swaps) 0 0
Commodity Derivatives – Noncurrent Asset (crude oil price and basis swaps and crude oil price swaptions) 0 0
Contingent Consideration – Current Liabilities 0 0
Debt Exchange Derivatives – Current Liabilities   0
Total 0 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Derivatives – Current Asset (crude oil price and basis swaps) 62,531 115,870
Commodity Derivatives – Noncurrent Asset (crude oil price and basis swaps and crude oil price swaptions) 42,682 61,843
Contingent Consideration – Current Liabilities 0 0
Debt Exchange Derivatives – Current Liabilities   0
Total 105,214 177,713
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Derivatives – Current Asset (crude oil price and basis swaps) 0 0
Commodity Derivatives – Noncurrent Asset (crude oil price and basis swaps and crude oil price swaptions) 0 0
Contingent Consideration – Current Liabilities (10,058) (58,069)
Debt Exchange Derivatives – Current Liabilities   (18,183)
Total $ (10,058) $ (76,252)