Acquisitions - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended		12 Months Ended
	Mar. 23, 2018	Feb. 28, 2019	Oct. 31, 2018	Dec. 29, 2018	Mar. 30, 2019
Mountain Valley Acquisition
Business Acquisition [Line Items]
Consideration transferred		$ 80.0	$ 80.4
Post-closing Capital Adjustment		(0.4)
Cash paid to sellers				$ 62.5
Cash paid on behalf of sellers for sellers’ transaction expenses				$ 1.8
Purchase price		$ 80.0	$ 80.4
Crystal Rock Acquisition
Business Acquisition [Line Items]
Consideration transferred	$ 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