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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets:    
Net operating loss carryforwards $ 14,542 $ 14,310
Accruals 12,218 2,993
Asset retirement obligations 41,382 26,383
Tax credits and federal return to provision 47,803 0
Interest limitation carryforward 13,892 7,486
Other 5,154 2,033
Total deferred tax assets 134,991 53,205
Deferred tax liabilities:    
Book tax differences in property basis (143,896) (95,348)
Derivative instruments (152) (3,692)
Total deferred tax liabilities (144,048) (99,040)
Net deferred tax asset (liability) $ (9,057) $ (45,835)