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Unaudited Pro forma Consolidated Results of Operations (Detail) - CaseStack, Inc. and Hub Group Dedicated [Member] $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($) $ / shares
Business Acquisition [Line Items] |
Revenue | $ | $ 898,019
Income from continuing operations | $ | $ 13,315
Earnings per share |
Basic | $ / shares | $ 0.40
Diluted | $ / shares | $ 0.40

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