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Legal Matters - Additional Information (Detail)		1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 05, 2015 Plaintiff Employee	May 31, 2015 Plaintiff	Mar. 31, 2019 Lawsuit	Sep. 30, 2018
Loss Contingencies [Line Items]
Number of putative class action lawsuits | Lawsuit			3
Robles Lawsuits [Member]
Loss Contingencies [Line Items]
Percentage of California drivers who accepted settlement offers				96.00%
Number of new plaintiffs		2
Number of plaintiffs against Hub Group Trucking	63
Number of employees filed lawsuit | Employee	5
Number of claims accepted settlement offers	58

X

- Definition

Loss contingency percentage of claimants approving proposed settlement offer.

+ References

No definition available.

+ Details

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X

- Definition

Number of employees filed lawsuit.

+ References

No definition available.

+ Details

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X

- Definition

Number of putative class action lawsuits.

+ References

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+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Number of claims settled.

+ References

No definition available.

+ Details

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X

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

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- Details

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