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Components of Other Intangible Acquired (Detail) - CaseStack, Inc. [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Customer Relationships [Member] | Logistics [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 65,600
Finite-lived intangible assets, Accumulated Amortization	5,467
Finite-lived intangible assets, Net Carrying Value	$ 60,133
Intangible assets estimated useful life	10 years
Customer Relationships [Member] | Transportation [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 8,700
Finite-lived intangible assets, Accumulated Amortization	1,450
Finite-lived intangible assets, Net Carrying Value	$ 7,250
Intangible assets estimated useful life	5 years
Trade Name [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 1,300
Finite-lived intangible assets, Accumulated Amortization	722
Finite-lived intangible assets, Net Carrying Value	$ 578
Intangible assets estimated useful life	18 months

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Name Accounting Standards Codification
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-SubTopic 340
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