v3.26.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash Flows from Operating Activities:    
Net Income (Loss) $ 147,511 $ (105,833)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:    
Depreciation, Depletion and Amortization 313,057 290,819
Gain on Sale of Assets (5,941) (5,968)
Stock-Based Compensation 8,635 32,027
Loss on Debt Extinguishment 0 11,680
Deferred Income Taxes 16,726 3,137
Loss from Equity Method Investments 8,985 8,034
Other Adjustments to Net Income (Loss) 2,963 1,915
Changes in Operating Assets:    
Accounts and Notes Receivable (36,544) (4,254)
Inventories (5,370) 26,323
Other Current Assets 5,885 (18,360)
Changes in Other Assets 1,856 22,654
Changes in Operating Liabilities:    
Accounts Payable (11,461) (78,411)
Other Operating Liabilities (26,829) (25,631)
Payments on Asset Retirement Obligations (19,995) (14,808)
Changes in Other Liabilities (29,631) (32,801)
Net Cash Provided by Operating Activities 369,847 110,523
Cash Flows from Investing Activities:    
Capital Expenditures (174,998) (154,007)
Proceeds from Sales of Assets 9,386 6,219
Proceeds from Sales of Short-Term Investments 0 80,165
Purchases of Short-Term Investments (813) (4,802)
Net Cash and Restricted Cash Acquired from Merger 0 368,726
Purchase of Arch Tax-Exempt Bonds 0 (98,225)
Investments in DTA (10,300) (10,640)
Other Investing Activity (10,514) (4,647)
Net Cash (Used in) Provided by Investing Activities (187,239) 182,789
Cash Flows from Financing Activities:    
Payments on Finance Lease Obligations (16,346) (5,628)
Proceeds from Long-Term Debt Issuance 0 114,439
Payments on Other Debt (3,646) (11,223)
Shares Withheld for Taxes (1,678) (14,068)
Repurchases of Common Stock (104,943) (183,152)
Debt-Related Financing Fees 0 (17,470)
Payments of Excise Tax on Share Repurchases (1,977) (934)
Dividends and Dividend Equivalents Paid (10,133) (15,918)
Net Cash Used in Financing Activities (138,723) (133,954)
Net Increase in Cash, Cash Equivalents and Restricted Cash 43,885 159,358
Cash, Cash Equivalents and Restricted Cash at Beginning of Period 601,162 447,542
Cash, Cash Equivalents and Restricted Cash at End of Period 645,047 606,900
Non-Cash Investing and Financing Activities:    
Equipment Financing 14,270 66,147
Equity Issued as Consideration for Merger $ 0 $ 2,481,368