Hedging Transactions and Derivative Financial Instruments - Additional Information (Detail) lb in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2018 USD ($) lb	Jul. 01, 2017 USD ($)	Dec. 30, 2017 USD ($) lb
Derivative [Line Items]
Period over which outstanding cash flow hedges are expected to settle			18 months
Cost of sales	$ 302,200,000	$ 293,500,000	$ 589,500,000	$ 561,600,000
Fair value of derivative liabilities	2,800,000		2,800,000		$ 1,200,000
Fair value of derivative instruments	0		0		$ 0
Gains and Losses on Derivative Instruments | Reclassification Out of Accumulated Other Comprehensive (Loss) Income
Derivative [Line Items]
Cost of sales	500,000	(800,000)	$ 1,400,000	(1,500,000)
Coffee Futures | Crystal Rock Acquisition
Derivative [Line Items]
Notional amount of derivatives (in pounds) | lb			42.6		48.1
Loss to be reclassified	2,400,000		$ 2,400,000
Coffee Futures | Crystal Rock Acquisition | Minimum
Derivative [Line Items]
Future contract period			3 months
Coffee Futures | Crystal Rock Acquisition | Maximum
Derivative [Line Items]
Future contract period			18 months
Coffee Futures | Gains and Losses on Derivative Instruments | Crystal Rock Acquisition | Reclassification Out of Accumulated Other Comprehensive (Loss) Income
Derivative [Line Items]
Cost of sales	500,000	(800,000)	$ 1,400,000	(1,500,000)
Cost of Sales | Coffee Futures | Gains and Losses on Derivative Instruments
Derivative [Line Items]
Loss (gain) reclassified from AOCI into expense	$ 500,000	$ (800,000)	$ 1,400,000	$ (1,500,000)