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INCOME TAXES (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Effective income tax rate reconciliation, at federal statutory income tax rate, percent | 21.00% | 21.00% | 21.00%
Federal net operating loss | $ 1,337,050 | $ 1,473,093 |
State net operating loss and benefits | 216,181 | 258,929 |
Other tax expense from gains on investments | 19,400 |  |
Current Tax Expense (Benefit) |  |  |
Federal | 2,897 | 980 | $ (1,278)
State | 9,544 | 1,797 | 963
Total current tax expense (benefit) | 12,441 | 2,777 | (315)
Deferred Tax Expense |  |  |
Federal | 433,469 | 154,068 | 327,806
State | 38,588 | 32,662 | 44,923
Total deferred tax expense | 472,057 | 186,730 | 372,729
Income tax expense | 484,498 | 189,507 | 372,414
Income Tax Reconciliation |  |  |
Income before income taxes | $ 1,984,204 | $ 802,316 | $ 1,650,991
Federal statutory income tax rate | 21.00% | 21.00% | 21.00%
Provision for federal income taxes | $ 416,683 | $ 168,486 | $ 346,708
State income taxes, net of federal benefit | 40,092 | 13,580 | 34,545
Deferred tax rate change, inclusive of valuation allowance | 6,350 | 20,879 | 11,340
Effective income tax rate reconciliation, tax expense (benefit), share-based payment arrangement, amount | (1,968) | (7,380) | (20,983)
Other, net | 23,341 | (6,058) | 804
Deferred Tax Assets |  |  |
Employee benefits and other accrued liabilities | 95,952 | 96,741 |
Federal net operating loss | 1,337,050 | 1,473,093 |
State net operating loss and benefits | 216,181 | 258,929 |
Derivative instruments | 118,063 | 134,499 |
Other | 4,863 | 12,894 |
Total deferred tax assets | 1,772,109 | 1,976,156 |
Carryforward expected to expire prior to utilization | (84,755) | (121,212) |
Net deferred tax assets | 1,687,354 | 1,854,944 |
Deferred Tax Liabilities |  |  |
Excess of tax over book depreciation | 84,692 | 87,021 |
Deferred tax liabilities, investments | 2,769,352 | 2,437,620 |
Total deferred tax liabilities | 2,854,044 | 2,524,641 |
Deferred Tax Liabilities, Net | (1,166,690) | (669,697) |
Valuation allowance, deferred tax asset, increase (decrease), amount | 6,400 | 20,900 | $ 11,300
Domestic Tax Authority |  |  |
Operating loss carryforwards | 6,400,000 |  |
State and Local Jurisdiction | Operating Loss Carryforwards, Subject to Expiration [Domain] |  |  |
Operating loss carryforwards | 1,900,000 |  |
State and Local Jurisdiction | Operating Loss Carryforwards, Indefinite Carryforward Period [Domain] |  |  |
Operating loss carryforwards | 2,800,000 |  |
Federal and State [Member] |  |  |
Federal net operating loss | 1,600,000 | 1,700,000 |
Deferred Tax Assets |  |  |
Federal net operating loss | $ 1,600,000 | $ 1,700,000 |

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