Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Details)

v2.4.0.8
Basis of Presentation - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
MMcf
Jun. 30, 2014
MMcf
Dec. 31, 2013
Basis Of Presentation [Line Items]      
Allowance for doubtful accounts receivable     $ 0
Increase in natural gas production volumes 254 518  
Adjustment to depreciation, depletion, amortization and accretion 0.7 1.5  
Reduction in net income $ 0.5 $ 1.0