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Income Taxes - Summary of Source and Tax Effects of Temporary Differences between Financial Reporting and Tax Bases of Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets: |  |
NOL carryforwards | $ 708,518 | $ 740,802
Interest disallowance limitation | 106,622 | 59,668
Federal tax credits | 89,644 | 92,730
Net unrealized losses | 80,723 | 0
State capital loss carryforward | 44,496 | 99,632
Incentive compensation and deferred compensation plans | 18,032 | 16,854
Other | 2,433 | 1,156
Deferred tax assets | 1,050,468 | 1,010,842
Valuation allowance | (257,218) | (290,812)
Net deferred tax asset | 793,250 | 720,030
Deferred tax liabilities: |  |
Property, plant and equipment | (2,516,074) | (2,457,946)
Investment in partnerships | (1,128,279) | 0
Net unrealized gains | 0 | (166,905)
Deferred tax liability | (3,644,353) | (2,624,851)
Net deferred tax liability | $ (2,851,103) | $ (1,904,821)

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