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Revenue Recognition - Disaggregated Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Total revenues $ 546,448 $ 304,748 $ 1,469,001 $ 843,955
Performance obligation satisfaction period     The majority of the Company’s sales are short-term in nature with a contract term of one year or less. For those contracts, the Company utilized the practical expedient in ASC 606-10-50-14 that exempts the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less. For the Company’s product sales that have a contract term greater than one year, the Company utilized the practical expedient in ASC 606-10-50-14(A) which states the Company is not required to disclose the transaction price allocated to remaining performance obligations if the variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under these sales contracts, each unit of product generally represents a separate performance obligation; therefore future volumes are wholly unsatisfied and disclosure of the transaction price allocated to remaining performance obligations is not required. Under the midstream services contracts, each unit of service represents a separate performance obligation and therefore performance obligations in respect of future services are wholly unsatisfied.  
Exploration and Production [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 497,161 269,843 $ 1,328,994 761,450
Exploration and Production [Member] | Oil Production [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 412,530 221,003 1,097,171 623,603
Exploration and Production [Member] | Purchased Oil Sales [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 42,902 20,734 114,598 56,269
Exploration and Production [Member] | Natural Gas, Production [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 26,181 17,037 76,201 51,689
Exploration and Production [Member] | Purchased Gas Sales [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 1,616 462 2,161 648
Exploration and Production [Member] | Natural Gas Liquid Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 13,932 10,607 38,863 29,241
Midstream Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 75,770 47,660 212,758 125,613
Well Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 56,439 47,163 161,242 101,594
Operating Segments [Member] | Exploration and Production [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 497,161 269,843 1,328,994 761,450
Operating Segments [Member] | Midstream Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 33,025 18,767 93,663 48,939
Operating Segments [Member] | Midstream Services [Member] | Purchased Oil Sales [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 1,838 0 5,212 0
Operating Segments [Member] | Midstream Services [Member] | Crude Oil and Natural Gas Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 18,188 11,612 54,124 23,348
Operating Segments [Member] | Midstream Services [Member] | Water Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 12,999 7,155 34,327 25,591
Operating Segments [Member] | Well Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 16,262 16,138 46,344 33,566
Operating Segments [Member] | Well Services [Member] | Hydraulic Fracturing Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues 14,985 15,090 42,801 31,303
Operating Segments [Member] | Well Services [Member] | Equipment Rental Services [Member]        
Disaggregation of Revenue [Line Items]        
Total revenues $ 1,277 $ 1,048 $ 3,543 $ 2,263