Hedging Transactions and Derivative Financial Instruments - Additional Information (Detail) lb in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($) lb	Sep. 30, 2017 USD ($)	Dec. 30, 2017 USD ($) lb
Derivative [Line Items]
Cost of sales	$ 298,800,000	$ 288,100,000	$ 888,300,000	$ 849,700,000
Fair value of derivative liabilities	10,700,000		10,700,000		$ 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	2,400,000	(200,000)	$ 3,800,000	(1,700,000)
Coffee Futures | Crystal Rock Acquisition
Derivative [Line Items]
Notional amount of derivatives (in pounds) | lb			83.4		48.1
Loss to be reclassified	9,700,000		$ 9,700,000
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			15 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	2,400,000	(200,000)	$ 3,800,000	(1,700,000)
Cost of Sales | Coffee Futures | Gains and Losses on Derivative Instruments
Derivative [Line Items]
Loss (gain) reclassified from AOCI into expense	$ 2,400,000	$ (200,000)	$ 3,800,000	$ (1,700,000)