Intangible Assets (Detail) - Supreme Industries Inc. [Member] $ in Thousands	1 Months Ended
	Sep. 27, 2017 USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 161,200
Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 20,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 139,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Backlog [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 2,200
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year