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Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State taxes, net of federal benefit	2.90%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	3.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	2.90%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
State incentives	(0.80%)hubg_EffectiveIncomeTaxRateReconciliationStateIncentives	(0.60%)hubg_EffectiveIncomeTaxRateReconciliationStateIncentives
State law changes	(0.90%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.10%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.30%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Nondeductible expenses	0.90%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.80%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Other	(0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.20%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Net effective rate	37.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	38.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations	38.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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Effective income tax rate reconciliation state incentives.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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