Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details)

v3.19.1
Financial Instruments (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Bcf
Not Designated as Hedging Instrument | Non-current asset  
Derivatives, Fair Value [Line Items]  
Derivative asset $ 0.0
Not Designated as Hedging Instrument | Current asset  
Derivatives, Fair Value [Line Items]  
Derivative asset 0.1
Not Designated as Hedging Instrument | Current liabilities  
Derivatives, Fair Value [Line Items]  
Derivative liability 0.7
Not Designated as Hedging Instrument | Non-current liability  
Derivatives, Fair Value [Line Items]  
Derivative liability $ 0.6
Commodity swaps  
Derivatives, Fair Value [Line Items]  
Hedged portions of expected sales of equity production | Bcf 18.3
Commodity swaps | Not Designated as Hedging Instrument  
Derivatives, Fair Value [Line Items]  
Realized gain on derivatives $ 0.2
Unrealized loss on derivatives $ 1.2
Basis Swap  
Derivatives, Fair Value [Line Items]  
Hedged portions of expected sales of equity production | Bcf 18.3
Level 2 | Commodity swaps | Not Designated as Hedging Instrument | Accrued liabilities  
Derivatives, Fair Value [Line Items]  
Derivative liability $ 0.6
Level 2 | Commodity swaps | Not Designated as Hedging Instrument | Non-current asset  
Derivatives, Fair Value [Line Items]  
Derivative liability $ 0.6