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Income Taxes - Provision for Income Taxes (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Tax provision at U.S. federal statutory rates | 21.00% | 21.00% | 21.00%
State income taxes net of federal benefit | 11.60% | 12.10% | 12.90%
Non-deductible permanent items | 2.50% | 0.90% | 4.00%
Variable interest entities | (2.10%) | (1.10%) | (1.30%)
Stock-based compensation | 2.80% | (0.30%) | (1.00%)
Change in valuation allowance | (2.60%) | 4.40% | 0.00%
Gain on sale of investment | 8.50% | 1.20% | (2.10%)
NOL adjustment | 0.20% | 0.50% | (0.10%)
Undistributed dividend | (11.50%) | 7.20% | 8.00%
Spin-off transaction | 3.00% | 0.00% | 0.00%
Other | 2.10% | 1.20% | (0.30%)
Effective income tax rate | 35.50% | 47.10% | 41.10%

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