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Income Taxes - Net Deferred Tax Assets/Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred Tax Assets:    
Gas Derivatives $ 461,952 $ 262,658
Net Operating Loss- Federal 187,154 209,731
Net Operating Loss - State 82,189 128,592
Operating Lease Liabilities 45,427 14,322
Federal Tax Credits 34,317 33,034
Section 174 Expenses 26,397 0
Gas Well Closing 25,045 25,682
Interest Limitation 14,618 0
Salary Retirement 8,167 11,504
Foreign Tax Credit 7,738 39,404
Convertible Note Amortization 5,080 0
Equity Compensation 4,474 5,838
Other 8,396 8,613
Total Deferred Tax Assets 910,954 739,378
Valuation Allowance (84,609) (151,798)
Net Deferred Tax Assets 826,345 587,580
Deferred Tax Liabilities:    
Property, Plant and Equipment (850,095) (749,811)
Investment in Partnership (163,483) (133,287)
Operating Lease Right-of-Use Assets 0 (15,864)
Advance Gas Royalties (44,238) (14,985)
Discount on Convertible Notes (286) (1,842)
Other (523) (392)
Total Deferred Tax Liabilities (1,058,625) (916,181)
Net Deferred Tax Liability $ (232,280) $ (328,601)