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Supplemental Disclosures to the Financial Statements (Tables)
9 Months Ended
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Other Current Assets
Other current assets reported on the condensed consolidated balance sheets included the following:
September 30, 2021December 31, 2020
(in thousands)
Assets held for sale$32,326 $— 
Prepaid expenses25,024 3,592 
Materials and supplies9,711 11,666 
Oil inventories 3,272 3,490 
Other226 652 
Total other current assets$70,559 $19,400 
Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses on the condensed consolidated balance sheets included the following:
September 30, 2021December 31, 2020
(in thousands)
Accounts payable-trade$11,762 $11,055 
Accrued expenses58,095 43,452 
Royalties payable20,469 15,150 
Greenhouse gas liability - current portion— 35,554 
Taxes other than income tax liability14,671 10,118 
Accrued interest3,597 10,783 
Dividends payable4,803 — 
Asset retirement obligations - current portion20,000 25,000 
Liabilities related to assets held for sale20,428 — 
Other766 873 
Total accounts payable and accrued expenses$154,591 $151,985 
Supplemental Disclosures to the Statements of Cash Flows
Supplemental disclosures to the condensed consolidated statements of cash flows are presented below:
Nine Months Ended
September 30,
20212020
(in thousands)
Supplemental Disclosures of Significant Non-Cash Investing Activities:
Material inventory transfers to oil and natural gas properties$2,916 $1,013 
Supplemental Disclosures of Cash Payments (Receipts):
Interest, net of amounts capitalized$29,114 $29,962 
Income taxes payments$294 $222