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Acquisitions - Weighted Average Assumptions (Details) - Proficient Transport | Dec. 31, 2021 | Feb. 28, 2021
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Risk-free rate |  |
Business Acquisition [Line Items] |  |
Measurement input | 0.001 | 0.001
Revenue discount rate |  |
Business Acquisition [Line Items] |  |
Measurement input | 0.098 | 0.083
Revenue volatility |  |
Business Acquisition [Line Items] |  |
Measurement input | 0.242 | 0.273

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