Annual report pursuant to Section 13 and 15(d)

Supplemental Oil and Gas Disclosures - Schedule of Prices Weighted by Field Production Related to Proved Reserves (Details)

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Supplemental Oil and Gas Disclosures - Schedule of Prices Weighted by Field Production Related to Proved Reserves (Details)
12 Months Ended
Dec. 31, 2015
$ / Boe
$ / Mcf
Dec. 31, 2014
$ / Boe
$ / Mcf
Dec. 31, 2013
$ / Boe
$ / Mcf
Dec. 31, 2012
$ / Boe
$ / Mcf
Oil        
Reserve Quantities [Line Items]        
Weighted price 46.94 91.12 99.65 98.13
NGLs        
Reserve Quantities [Line Items]        
Weighted price 17.60 34.63 35.21 47.30
Natural Gas        
Reserve Quantities [Line Items]        
Weighted price | $ / Mcf 2.50 4.27 3.80 2.77