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INCOME TAXES - Additional Tax Disclosures (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes |  |  |  |
Income tax expense recognized | $ 76,400 |  |  |
Accrued interest and penalties | 0 | $ 0 |  |
Uncertain Tax Positions |  |  |  |
Unrecognized tax benefits | 14,872 | 15,185 | $ 15,342 | $ 15,413
Gross decrease in tax portions from prior years |  |  | $ (71) |
Net decrease in tax portions for 2020 |  | $ (157) |  |
Net decrease in tax portions for 2021 | (313) |  |  |
Unrecognized tax benefits would affect the effective income tax rate if recognized | 8,400 |  |  |
Federal |  |  |  |
Income Taxes |  |  |  |
Net operating loss carryforwards | 92,900,000 |  |  |
Tax credit carryforward amount | 42,100 |  |  |
State |  |  |  |
Income Taxes |  |  |  |
Net operating loss carryforwards | 648,600 |  |  |
State | Research and development |  |  |  |
Income Taxes |  |  |  |
Tax credit carryforward amount | $ 31,600 |  |  |

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