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

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

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Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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The liability incurred for chassis converter pool agreement classified as current.

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Contingencies - Additional Information (Detail) $ in Thousands, R$ in Millions	1 Months Ended		6 Months Ended
	Nov. 22, 2011 USD ($)	Nov. 22, 2011 BRL (R$)	Jun. 30, 2018 USD ($)	Jun. 30, 2018 BRL (R$)	Dec. 31, 2017 USD ($)	May 31, 2012 USD ($)
Loss Contingencies [Line Items]
Damages asserted by SVI \| R$				R$ 20.8
Business combination, recognized identifiable assets acquired and liabilities assumed, contingent liability						$ 2,900
Chassis converter pool Liability, Current			$ 14,641		$ 18,326
Supreme Industries Inc. [Member]
Loss Contingencies [Line Items]
Damages asserted by SVI			40,000
Court-Imposed Interest, Fees or Inflation Adjustments
Loss Contingencies [Line Items]
Total ordered damages granted to Bk	$ 6,900
Court-Imposed Interest, Fees or Inflation Adjustments \| Maximum
Loss Contingencies [Line Items]
Total ordered damages granted to Bk \| R$		R$ 26.7
Chassis Converter Pool Agreements [Member]
Loss Contingencies [Line Items]
Other Inventory, Gross			$ 7,500