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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Current Assets:    
Cash and Cash Equivalents $ 3,748 $ 779
Restricted Cash 2,428 12,685
Accounts and Notes Receivable:    
Trade, net 209,523 264,658
Other Receivables, net 27,928 61,249
Supplies Inventories 30,108 26,201
Derivative Instruments 164,572 106,068
Prepaid Expenses 20,025 18,697
Total Current Assets 458,332 490,337
Property, Plant and Equipment:    
Property, Plant and Equipment 14,222,717 14,057,224
Less—Accumulated Depreciation, Depletion and Amortization 6,310,588 6,193,871
Total Property, Plant and Equipment—Net 7,912,129 7,863,353
Other Non-Current Assets:    
Operating Lease Right-of-Use Assets 137,987 150,310
Derivative Instruments 184,261 134,396
Goodwill 323,314 323,314
Other Intangible Assets 55,695 57,333
Other 59,465 75,403
Total Other Non-Current Assets 760,722 740,756
TOTAL ASSETS 9,131,183 9,094,446
Current Liabilities:    
Accounts Payable 162,043 158,811
Derivative Instruments 244,321 377,945
Current Portion of Finance Lease Obligations 5,106 5,095
Current Portion of Long-Term Debt 208,437 208,095
Current Portion of Operating Lease Obligations 47,486 48,453
Other Accrued Liabilities 260,356 325,976
Total Current Liabilities 927,749 1,124,375
Non-Current Liabilities:    
Long-Term Debt 2,158,416 2,213,264
Finance Lease Obligations 23,716 24,991
Operating Lease Obligations 93,438 104,955
Derivative Instruments 107,944 158,368
Deferred Income Taxes 936,137 857,367
Asset Retirement Obligations 163,692 163,051
Other 93,511 111,059
Total Non-Current Liabilities 3,576,854 3,633,055
TOTAL LIABILITIES 4,504,603 4,757,430
Stockholders’ Equity:    
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 141,942,305 Issued and Outstanding at March 31, 2026; 142,590,509 Issued and Outstanding at December 31, 2025 1,420 1,427
Capital in Excess of Par Value 2,356,077 2,357,039
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding 0 0
Retained Earnings 2,274,690 1,984,229
Accumulated Other Comprehensive Loss (5,607) (5,679)
TOTAL STOCKHOLDERS' EQUITY 4,626,580 4,337,016
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 9,131,183 $ 9,094,446