Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Gathering and Treating Fees) (Details)

v3.19.2
Revenue Recognition (Gathering and Treating Fees) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Accounts Receivable          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Contract with customer, asset, gross, current $ 67,891   $ 67,891   $ 87,061
Natural Gas, Gathering and Treating Fees | Natural Gas Revenue          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Cost of goods and services sold $ 2,805 $ 1,952 $ 5,213 $ 3,204