Acquisitions - Additional Information (Detail) - Crystal Rock Acquisition - USD ($) $ in Millions		6 Months Ended
	Mar. 23, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Total consideration	$ 37.7
Cash paid to sellers	20.7
Cash paid on behalf of sellers for sellers’ transaction expenses	0.8
Liabilities incurred	16.2
Purchase price	$ 21.5	$ 21.5
Revenue of acquiree since acquisition		15.8
Acquisition related costs		$ 1.4