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Equity Method Investments - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule Of Results Related To Equity Accounted Investees [Line Items] |  |  |
Undistributed earnings of equity method investees | $ 31,100,000 | $ 41,300,000 |
Reimbursable costs included in revenues of equity method investees | 5,126,600,000 | 4,453,700,000 | $ 4,102,900,000
Provision for income taxes | 75,079,000 | 75,757,000 | $ 89,425,000
Accounts receivable – other | 16,339,000 | 26,894,000 |
Investees |  |  |
Schedule Of Results Related To Equity Accounted Investees [Line Items] |  |  |
Provision for income taxes | 0 |  |
Related Party |  |  |
Schedule Of Results Related To Equity Accounted Investees [Line Items] |  |  |
Accounts receivable – other | $ 1,100,000 | $ 1,500,000 |

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