Property Acquisitions and Divestitures - Narrative (Details)
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3 Months Ended |
12 Months Ended |
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Mar. 02, 2018
USD ($)
a
Wells
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Feb. 08, 2018
USD ($)
a
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Jun. 08, 2017
USD ($)
a
Wells
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Dec. 31, 2018
USD ($)
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Dec. 31, 2019
USD ($)
a
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Dec. 31, 2018
USD ($)
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Dec. 31, 2017
USD ($)
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| Business Acquisition [Line Items] |
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| Acquisition of oil and natural gas properties |
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$ 103,709,000
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$ 212,513,000
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$ 435,547,000
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| Allocated to unproved properties |
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$ 1,680,065,000
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1,470,903,000
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1,680,065,000
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| Allocated to proved properties |
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2,895,280,000
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3,962,175,000
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2,895,280,000
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| Proceeds from sale of undeveloped acres |
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$ 34,730,000
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148,149,000
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$ 22,496,000
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| Northern Delaware Basin |
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| Business Acquisition [Line Items] |
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| Undeveloped net acres acquired | a |
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4,000
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| Acquisition of oil and natural gas properties |
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$ 94,700,000
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$ 350,100,000
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| Gas and oil area, average working interest percentage |
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92.00%
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| Settlement adjustments |
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300,000
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| Net purchase price of undeveloped acres |
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182,300,000
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| Allocated to unproved properties |
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296,900,000
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142,500,000
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142,500,000
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| Allocated to proved properties |
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53,200,000
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39,800,000
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39,800,000
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| Transaction costs |
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$ 500,000
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200,000
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$ 200,000
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| Number of horizontal wells acquired (in wells) | Wells |
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36
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| Gas and oil area, area offset by existing acreage (in acres) | a |
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11,850
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| Gas and oil area, gross offset existing acreage (in acres) | a |
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14,770
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| Gas and oil area, operated by company, percent |
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79.00%
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| Gas and oil area, working interest, percent |
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85.00%
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| Lea County, New Mexico and Reeves County |
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| Business Acquisition [Line Items] |
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| Undeveloped net acres acquired | a |
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2,900
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| Acquisition of oil and natural gas properties |
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$ 87,900,000
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| Reeves County |
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| Business Acquisition [Line Items] |
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| Undeveloped net acres acquired | a |
8,600
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| Number wells sold (in wells) | Wells |
12
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| Proceeds from sale of undeveloped acres |
$ 140,700,000
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| Average working interest percentage |
32.00%
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| Gain (loss) on sale of oil and gas properties |
$ 0
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| Previously Reported [Member] | Northern Delaware Basin |
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| Business Acquisition [Line Items] |
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| Acquisition of oil and natural gas properties |
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$ 350,000,000.0
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| Restatement Adjustment [Member] | Northern Delaware Basin |
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| Business Acquisition [Line Items] |
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| Acquisition of oil and natural gas properties |
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$ 100,000
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