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Revenue Recognition (Tables)
12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
Revenues associated with contracts with customers for crude oil, natural gas and NGL sales were as follows for the years ended December 31, 2019, 2018 and 2017:
Exploration and Production Revenues
 Year Ended December 31,
 201920182017
 (In thousands)
Crude oil revenues$1,261,413  $1,425,409  $912,806  
Purchased crude oil sales401,554  540,633  132,331  
Natural gas and NGL revenues147,358  164,615  121,828  
Purchased natural gas sales7,207  6,078  1,211  
Total exploration and production revenues$1,817,532  $2,136,735  $1,168,176  
Revenues associated with contracts with customers for midstream services were as follows for the years ended December 31, 2019, 2018 and 2017:
Midstream Revenues(1)
 Year Ended December 31,
 201920182017
 (In thousands)
Midstream service revenues
Crude oil and natural gas revenues$95,399  $73,028  $37,369  
Produced and flowback water revenues40,534  37,791  30,727  
Total midstream service revenues$135,933  $110,819  $68,096  
Midstream product revenues
Purchased crude oil sales$30  $3,633  $—  
Natural gas and NGL revenues70,746  1,464  —  
Freshwater revenues5,529  8,221  4,656  
Total midstream product revenues$76,305  $13,318  $4,656  
Total midstream revenues$212,238  $124,137  $72,752  
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(1)Represents midstream revenues excluding all intercompany revenues for work performed by the midstream services business segment for the Company’s working interests that are eliminated in consolidation and are therefore not included in midstream services revenues.
Revenues associated with contracts with customers for hydraulic fracturing services and equipment rental sales were as follows for the years ended December 31, 2019, 2018 and 2017:
Well Services Revenues(1)
 Year Ended December 31,
 201920182017
 (In thousands)
Hydraulic fracturing revenues$39,112  $56,620  $49,266  
Equipment rental revenues2,862  4,455  3,525  
Total well services revenues$41,974  $61,075  $52,791  
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(1)Represents well services revenues excluding all intercompany revenues for work performed by the well services business segment for the Company’s working interests that are eliminated in consolidation and are therefore not included in well services revenues.
Change in Company's Contract Liabilities The following table reflects the changes in the Company’s contract liabilities during the year ended December 31, 2019:
(In thousands)
Balance as of December 31, 2018$—  
Cash received2,174  
Revenues recognized(69) 
Balance as of December 31, 2019$2,105  
Estimated Revenue Satisfaction Period Related to Remaining Performance Obligations The following table presents estimated revenue allocated to remaining performance obligations for contracted revenues that are unsatisfied (or partially satisfied) as of December 31, 2019:
(In thousands)
2020$18,452  
202120,203  
202219,244  
202312,642  
202411,870  
Thereafter2,768  
Total$85,179