Summary of Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 2,100
Balance at End of Period	1,800	$ 2,100
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	2
Net Provision (Recovery)	45	2
Amounts Charged Against Reserves	0
Balance at End of Period	47	2
Discount Accrual
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	4,636	3,072	$ 3,078
Net Provision (Recovery)	43,920	36,213	30,171
Amounts Charged Against Reserves	(42,284)	(34,649)	(30,177)
Balance at End of Period	6,272	4,636	3,072
Inventory Obsolescence Reserve
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	2,580	1,826	2,262
Net Provision (Recovery)	8,092	4,175	5,751
Amounts Charged Against Reserves	(4,297)	(3,421)	(6,187)
Balance at End of Period	6,375	2,580	1,826
Stale Beer Reserve
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	2,146	3,023	5,226
Net Provision (Recovery)	4,406	2,691	5,449
Amounts Charged Against Reserves	(4,724)	(3,568)	(7,652)
Balance at End of Period	$ 1,828	$ 2,146	$ 3,023