Commitments and Contingencies - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Apr. 01, 2018 USD ($) Product	Apr. 02, 2017 USD ($) Product	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Letters of credit totaled	$ 35,600,000		$ 35,600,000
Long-term marketing contractual arrangements	126,200,000
SAC [Member]
Loss Contingencies [Line Items]
Proceeds from management fees received from SAC	$ 2,200,000	$ 2,100,000
Cases of finished product obligated to purchase on an annual basis | Product	17,500,000
Purchased number of cases finished product from SAC | Product	7,200,000	6,700,000
Debt guarantee for related party	$ 23,900,000		23,900,000
Guaranteed portion of SAC's and Southeastern's debt, collateral held	The Company holds no assets as collateral against the SAC guarantee
Impairment of investments	$ 0		$ 0
Southeastern [Member]
Loss Contingencies [Line Items]
Purchase requirements of plastic bottles	80.00%