Components of Other Intangible Acquired (Detail) - CaseStack, Inc. [Member] $ in Thousands	6 Months Ended
	Jun. 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	3,827
Finite-lived intangible assets, Net Carrying Value	$ 61,773
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	1,015
Finite-lived intangible assets, Net Carrying Value	$ 7,685
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	506
Finite-lived intangible assets, Net Carrying Value	$ 794
Intangible assets estimated useful life	18 months