Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 20, 2019	Dec. 30, 2018	Dec. 29, 2018
Variable Interest Entity [Line Items]
Right-of-use assets	$ 377,484	$ 387,300
Right-of-use liabilities	381,133	$ 391,900
Property, plant and equipment, net	711,765		$ 743,847
VIE
Variable Interest Entity [Line Items]
Right-of-use assets	17,900
Right-of-use liabilities	21,800
Property, plant and equipment, net			21,900
Gross distribution rights notes receivable	$ 177,600		$ 154,400