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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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