Annual report pursuant to Section 13 and 15(d)

Acquisitions and Divestitures (Details Textual)

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Acquisitions and Divestitures (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2019
Aug. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Payments to Acquire Oil and Gas Property and Equipment, Total     $ 661 $ 2,919 $ 188,019
Permian Basin [Member]          
Payments to Acquire Businesses, Net of Cash Acquired, Total   $ 169,800      
Mobile Bay Properties [Member]          
Payments to Acquire Oil and Gas Property and Equipment, Cash from Long-term Lines of Credit   $ 150,000      
Chevron [Member]          
Payments to Acquire Businesses, Net of Cash Acquired, Total       2,200  
Magnolia Field Acquisition [Member]          
Payments to Acquire Businesses, Net of Cash Acquired, Total $ 15,900        
Marubeni [Member]          
Payments to Acquire Businesses, Net of Cash Acquired, Total       $ 1,500