Annual report pursuant to Section 13 and 15(d)

Revenue (Details)

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Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue                      
Revenues from contracts with customers                 $ 3,940,558 $ 4,133,139 $ 3,018,685
Revenue from derivatives and other sources                 468,132 6,487 636,889
Total revenue and other $ 952,738 $ 1,118,881 $ 1,299,664 $ 1,037,407 $ 1,045,649 $ 1,076,532 $ 989,344 $ 1,028,101 4,408,690 4,139,626 3,655,574
Natural gas sales                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 2,247,162 2,287,939 1,769,284
Oil sales                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 177,549 187,178 108,195
Marketing                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 292,207 458,901 258,045
Other income                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 4,160    
Exploration and production | Natural gas sales                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 2,247,162 2,287,939 1,769,284
Exploration and production | Natural gas liquids sales (ethane)                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 124,563 172,653 93,041
Exploration and production | Natural gas liquids sales (C3+ NGLs)                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 1,094,599 1,005,124 777,400
Exploration and production | Oil sales                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 177,549 187,178 108,195
Gathering and compression | Gathering and compression                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 3,972 17,817 11,386
Water handling and treatment | Water handling and treatment                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 506 3,527 1,334
Marketing | Marketing                      
Disaggregation of Revenue                      
Revenues from contracts with customers                 $ 292,207 $ 458,901 $ 258,045