Quarterly report pursuant to Section 13 or 15(d)

Oil And Natural Gas Properties And Equipment (Narrative) (Details)

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Oil And Natural Gas Properties And Equipment (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment of proved properties $ 88 $ 0 $ 0 $ 88
Avouma And Other Fields [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment of proved properties $ 0