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Acquisition - Additional Information (Detail) - Forward Air Final Mile Acquisition [Member] $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 20, 2023 USD ($) Carrier | Jun. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Business Acquisition [Line Items] |  |  |  |
Business acquisition date | Dec. 20, 2023 |  |  |
Percentage of equity interests acquired | 100.00% |  |  |
Consideration for transaction | $ 257.2 | $ 3.7 |  |
Cash consideration for business acquisition |  |  |  | $ 260.9
Number of network carriers | Carrier | 350 |  |  |
Estimated fair value of intangible assets | $ 94.7 |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments | $ 39.8 |  |  |
Goodwill and other intangible assets tax deductible, period | 15 years |  |  |
Amortization expense of intangible assets |  | $ 1.7 | $ 4.3 |
Intangible assets, remaining weighted average useful life |  | 12 years 3 months | 12 years 3 months |

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