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v3.20.4

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Deferred tax assets: |  |  |
Net operating loss carryforward | $ 392,318 | $ 269,851 | $ 164,363
Oil and gas property basis difference | 463,705 | 289,850 | 3,595
Investment in pass through entities | 61,078 | 58,951 | 8,620
Stock-based compensation expense | 1,223 | 1,440 | 616
Business energy investment tax credit | 370 | 370 | 369
Charitable contributions carryover | 318 | 297 | 269
Change in fair value of derivative instruments | 7,656 | 11,219 | 2,761
Foreign tax credit carryforwards | 523 | 943 | 2,009
Accrued liabilities | 868 | 669 | 834
ARO liability | 13,414 | 12,744 | 16,923
Non-oil and gas property basis difference | 0 | 0 | 104
Lease liability | 72 | 12,128 | 0
Reorganization items | 25,714 | 0 | 0
State net operating loss carryover | 22,191 | 13,258 | 11,526
Interest expense carryforward | 0 | 23,818 | 0
Total deferred tax assets | 989,450 | 695,538 | 211,989
Valuation allowance for deferred tax assets | (985,528) | (647,575) | (211,987)
Deferred tax assets, net of valuation allowance | 3,922 | 47,963 | 2
Deferred tax liabilities: |  |  |
Non-oil and gas property basis difference | 575 | 1,859 | 0
Change in fair value of derivative instruments | 3,272 | 26,410 | 2
Right of use asset | 72 | 12,128 | 0
Other | 3 | 3 | 0
Total deferred tax liabilities | 3,922 | 40,400 | 2
Net deferred tax asset | $ 0 | $ 7,563 | $ 0

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