Acquisition - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Apr. 04, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Business acquisition, goodwill		$ 9.5	$ 6.3	$ 6.3	$ 6.3
Business combination, amount		$ 17.3
BenBilt [Member]
Business Acquisition [Line Items]
Business acquisition, goodwill	$ 3.2
Business acquisition, intangibles	6.7
Business acquisition, property, plant and equipment	4.5
Business combination, amount	$ 17.3