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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Net operating loss carryforwards $ 22,402 $ 40,846
Accruals 10,728 11,731
Asset retirement obligations 48,994 44,437
Derivative instruments 2,280 12,776
Tax credits 88,908 61,044
Other 2,882 3,551
Subtotal 176,194 174,385
Valuation allowance 0 (77,546)
Total deferred tax assets 176,194 96,839
Deferred tax liabilities:    
Book tax differences in property basis (133,350) (98,670)
Total deferred tax liabilities (133,350) (98,670)
Net deferred tax asset $ 42,844  
Net deferred tax liability   $ (1,831)