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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes |  |  |
Statutory U.S. federal income tax rate | 21.00% | 21.00% | 21.00%
State income taxes, net of federal tax benefit | 2.80% | 2.80% | 2.40%
State tax credits, net of federal effect | (1.00%) | (1.60%) | (1.20%)
Excess tax benefits | (0.30%) | (0.10%) | (1.30%)
Nondeductible expenses | 0.30% | 0.20% | 0.10%
Other | (1.70%) | 0.80% | 0.40%
Effective income tax rate | 21.10% | 23.10% | 21.40%

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