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Income Taxes - Components of net deferred taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 3,878,344 | $ 3,676,333
Tax credit and other attribute carryforwards | 84,812 | 84,624
Accrued interest | 13,302 |
Depreciation and amortization for tax in excess of book expense | 20,431 | 118,151
Other | 100,316 | 135,729
Subtotal | 4,097,205 | 4,014,837
Valuation allowance | (3,839,885) | (3,754,207)
Deferred tax assets | 257,320 | 260,630
Deferred tax liabilities: |  |
Other | 2,858 | 4,772
Deferred tax liability | 2,858 | 4,772
Net deferred tax assets (liabilities) | 254,462 | 255,858
Balance Sheet Summary : |  |
Net noncurrent deferred tax asset | 257,320 | 258,631
Net noncurrent deferred tax liability | (2,858) | (2,773)
Net deferred tax assets (liabilities) | $ 254,462 | $ 255,858

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