Quarterly report pursuant to Section 13 or 15(d)

Acquisitions??and Divestitures (Narrative - Dispositions) (Details)

v3.20.2
Acquisitions and Divestitures (Narrative - Dispositions) (Details)
3 Months Ended
Nov. 02, 2020
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
a
Oct. 01, 2020
Subsequent Event | Non-Operated Working Interest Transaction        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale $ 29,600,000      
ORRI Transaction | Subsequent Event        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Percent of overriding royalty interest to be sold       2.00%
ORRI Transaction | Plan        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Consideration   $ 140,000,000.0    
Proceeds from divestiture of businesses   $ 135,800,000    
Gain (loss) on disposal     $ 0  
Non-Operated Working Interest Transaction | Subsequent Event        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Consideration $ 30,000,000.0      
Certain Non-core Assets in the Midland Basin        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Consideration     244,900,000  
Potential contingency payments     $ 60,000,000.0  
Potential contingency payments, period     3 years  
Area of land | a     9,850  
Working interest     66.00%