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Acquisition - Additional Information (Detail) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 03, 2018 USD ($) | Jul. 01, 2017 USD ($) Tractor Trailer | Dec. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense of intangible assets |  |  |  |  |  |  |  |  |  |  |  | $ 5,700 | $ 3,000 |
Revenue |  |  |  | $ 1,018,293 | $ 933,224 | $ 894,734 | $ 837,342 | $ 909,239 | $ 824,809 | $ 708,572 | $ 680,443 | 3,683,593 | 3,123,063 | $ 2,750,449
Operating income |  |  |  | $ 48,244 | $ 34,734 | $ 25,406 | $ 16,535 | $ 35,067 | $ 15,824 | $ 10,465 | $ 11,313 | $ 124,919 | 72,669 | $ 96,557
Hub Group Dedicated [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tractors in operating fleet | Tractor |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |
Number of trailers in operating fleet | Trailer |  | 4,500 |  |  |  |  |  |  |  |  |  |  |  |
Estenson Logistics, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition date |  |  |  |  |  |  |  |  |  |  |  | Jul. 01, 2017 |  |
Consideration for transaction |  | $ 284,691 |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration related to an earn-out provision |  | 6,000 |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, final consideration |  | 172,014 |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, debt assumed |  | 112,677 |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cash paid |  | 165,945 |  |  |  |  |  |  |  |  |  |  |  |
Amount of cash borrowed under credit agreement |  | $ 55,000 |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition costs |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,600 |
CaseStack, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for transaction | $ 252,125 |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cash paid | 248,656 |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchase consideration | $ 3,469 |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchase consideration payable term | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  |  |  |  |  |  |  | $ 1,400 |  |
Amortization expense of intangible assets |  |  |  |  |  |  |  |  |  |  |  | $ 800 |  |
Intangible assets, weighted average useful life |  |  |  |  |  |  |  |  |  |  |  | 9 years |  |
Revenue |  |  | $ 20,800 |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  | $ 700 |  |  |  |  |  |  |  |  |  |  |

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