Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.8.0.1
Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Minimum    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Performance obligation 30 days  
Maximum    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Performance obligation 90 days  
Natural Gas Revenue | Accounting Standards Update 2014-09    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Gathering and treating fees $ 1,252  
Lease Operating Expense | Accounting Standards Update 2014-09    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Gathering and treating fees   $ 723