Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details)

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Supplemental Cash Items:      
Cash Paid During the Period for Interest, Net of Amount Capitalized   $ 26,547 $ 29,117
Cash Paid During the Period for Income Taxes   0 0
Non-cash Investing Activities:      
Oil and Natural Gas Properties Included in Accounts Payable and Accrued Liabilities   101,018 92,537
Capitalized Asset Retirement Obligations   7,982 294
Contingent Consideration   354 0
Compensation Capitalized on Oil and Gas Properties   219 284
Non-cash Financing Activities:      
Common Stock Dividends Declared $ 1,985 1,985 0
Acquisitions of Oil and Natural Gas Properties      
Non-cash Investing Activities:      
Issuance of Common Stock - Acquisitions of Oil and Natural Gas Properties   30,512 0
Non-cash Financing Activities:      
Issuance of stock for Second Lien Notes Repurchase   30,512 0
Common Stock | Second Lien Notes due 2023 | Second Lien Notes      
Non-cash Investing Activities:      
Issuance of Common Stock - Acquisitions of Oil and Natural Gas Properties   0 29,615
Non-cash Financing Activities:      
Issuance of stock for Second Lien Notes Repurchase   0 29,615
Preferred Stock | Second Lien Notes due 2023 | Second Lien Notes      
Non-cash Investing Activities:      
Issuance of Common Stock - Acquisitions of Oil and Natural Gas Properties   0 81,212
Non-cash Financing Activities:      
Issuance of stock for Second Lien Notes Repurchase   $ 0 $ 81,212