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Commitments and Contingencies - Additional Information (Detail) $ in Thousands, BRL in Millions	1 Months Ended		12 Months Ended
	Nov. 22, 2011 USD ($)	Nov. 22, 2011 BRL	Dec. 31, 2017 BRL	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 31, 2012 USD ($)
Loss Contingencies [Line Items]
Damages asserted by BK | BRL			BRL 20.8
Business combination, recognized identifiable assets acquired and liabilities assumed, contingent liability						$ 2,900
Purchase Obligation				$ 58,700
Chassis converter pool Liability, Current				18,326	$ 0
Court-Imposed Interest, Fees or Inflation Adjustments
Loss Contingencies [Line Items]
Total ordered damages granted to Bk	$ 8,100
Court-Imposed Interest, Fees or Inflation Adjustments | Maximum
Loss Contingencies [Line Items]
Total ordered damages granted to Bk | BRL		BRL 26.7
Arizona Department Of Environmental Quality
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss				300
Standby Letters Of Credit
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount				5,300
Chassis Converter Pool Agreements [Member]
Loss Contingencies [Line Items]
Other Inventory, Gross				$ 3,200

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- Definition

The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date.

+ References

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Amount of damages awarded to the plaintiff in the legal matter.

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