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Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 4.00% | 3.30% | (0.50%)
Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent | (0.60%) | (7.80%) | 1.20%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent | (0.90%) | 10.10% | (0.20%)
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | (7.30%) | (93.60%) | 0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent | 0.90% | 2.20% | (0.60%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent | (0.10%) | 8.10% | 0.10%
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent | (0.70%) | 0.80% | 0.20%
Effective Income Tax Rate Reconciliation, Percent | 25.30% | 37.00% | 21.60%
Income tax (provision) benefit | $ 36.4 | $ 27.0 | $ (7.7)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | (7.30%) | (93.60%) | 0.00%
Computed expected tax provision | $ 30.3 | $ 15.3 | $ (7.5)
State and local taxes, net of federal income tax impact | 5.8 | 2.4 | 0.2
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount | (10.5) | (68.4) | 0.0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 1.3 | 1.6 | 0.2
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | (0.1) | 5.9 | 0.0
Other | $ (1.0) | $ 0.6 | $ (0.1)
Effective Income Tax Rate Reconciliation, Percent | 25.30% | 37.00% | 21.60%
Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Amount | $ (0.8) | $ (5.7) | $ (0.4)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount | $ 1.3 | $ 7.4 | $ 0.1
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent | (0.70%) | 0.80% | 0.20%
Income tax (provision) benefit | $ 36.4 | $ 27.0 | $ (7.7)
Uncertain tax provision |  |  |
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount | $ (2.2) | $ (0.6) | $ (0.2)
Uncertain tax provision |  |  |
Income Tax Disclosure [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | 7.30% | 93.60% | 0.00%
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | 7.30% | 93.60% | 0.00%
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount | $ (10.5) | $ (68.4) | $ 0.0
Uncertain tax provision |  |  |
Income Tax Disclosure [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | 1.50% | (0.80%) | 0.50%
Effective Income Tax Rate Reconciliation, Worthless Stock Deduction | 1.50% | (0.80%) | 0.50%

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