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Revenue Recognition - Disaggregation of Revenues (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 [Line Items]                      
Revenues $ 483,864 $ 482,743 $ 529,405 $ 575,732 $ 599,755 $ 674,629 $ 573,751 $ 473,812 $ 2,071,744 $ 2,321,947 $ 1,293,719
Exploration and Production                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,817,532 2,136,735 1,168,176
Exploration and Production | Crude oil revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,261,413 1,425,409 912,806
Exploration and Production | Purchased crude oil sales                      
Disaggregation of Revenue [Line Items]                      
Revenues                 401,554 540,633 132,331
Exploration and Production | Natural gas and NGL revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 147,358 164,615 121,828
Exploration and Production | Purchased natural gas sales                      
Disaggregation of Revenue [Line Items]                      
Revenues                 7,207 6,078 1,211
Midstream                      
Disaggregation of Revenue [Line Items]                      
Revenues                 488,427 286,642 185,799
Well Services                      
Disaggregation of Revenue [Line Items]                      
Revenues                 121,660 205,619 148,136
Operating segments | Exploration and Production                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,817,532 2,136,735 1,168,176
Operating segments | Midstream                      
Disaggregation of Revenue [Line Items]                      
Revenues                 212,238 124,137 72,752
Operating segments | Midstream | Purchased crude oil sales                      
Disaggregation of Revenue [Line Items]                      
Revenues                 30 3,633 0
Operating segments | Midstream | Crude oil and natural gas revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 95,399 73,028 37,369
Operating segments | Midstream | Produced and flowback water revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 40,534 37,791 30,727
Operating segments | Midstream | Total midstream service revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 135,933 110,819 68,096
Operating segments | Midstream | Natural gas and NGL revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 70,746 1,464 0
Operating segments | Midstream | Freshwater revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 5,529 8,221 4,656
Operating segments | Midstream | Total midstream product revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 76,305 13,318 4,656
Operating segments | Well Services                      
Disaggregation of Revenue [Line Items]                      
Revenues                 41,974 61,075 52,791
Operating segments | Well Services | Hydraulic fracturing revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 39,112 56,620 49,266
Operating segments | Well Services | Equipment rental revenues                      
Disaggregation of Revenue [Line Items]                      
Revenues                 $ 2,862 $ 4,455 $ 3,525