Annual report pursuant to Section 13 and 15(d)

FINANCIAL INSTRUMENTS - Additional Information (Details)

v3.19.3.a.u2
FINANCIAL INSTRUMENTS - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Bcf
Dec. 31, 2018
USD ($)
Basis Swap    
Derivatives, Fair Value [Line Items]    
Hedged portions of expected sales of equity production | Bcf 11.4  
Commodity swaps    
Derivatives, Fair Value [Line Items]    
Hedged portions of expected sales of equity production | Bcf 11.4  
Commodity swaps | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Gain on derivative $ 3.7  
Loss on derivative   $ 0.1
Unrealized gain derivatives 3.4 $ 0.1
Other Current Assets | Commodity swaps    
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), at fair value, net 3.1  
Other non-current assets | Commodity swaps    
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), at fair value, net $ 0.4