Net Income per Share - Additional Information (Detail)	3 Months Ended												12 Months Ended
	Dec. 26, 2020 customer $ / shares	Sep. 26, 2020 $ / shares	Jun. 27, 2020 $ / shares	Mar. 28, 2020 $ / shares	Dec. 28, 2019 $ / shares	[1]	Sep. 28, 2019 $ / shares	[1]	Jun. 29, 2019 $ / shares	[1]	Mar. 30, 2019 $ / shares	[1]	Dec. 26, 2020 customer $ / shares shares	Dec. 28, 2019 $ / shares shares	Dec. 29, 2018 $ / shares shares
Earnings Per Share Note [Line Items]
Net income per common share - basic	$ 2.68	$ 6.61	$ 4.93	$ 1.50	$ 1.13		$ 3.70		$ 2.39		$ 2.04		$ 15.73	$ 9.26	$ 7.90
Conversion ratio for Class B to Class A shares | customer	1												1
Common Class A
Earnings Per Share Note [Line Items]
Net income per common share - basic													$ 15.73	$ 9.26	$ 7.90
Antidilutive securities excluded from computation of earnings per share | shares													0	23,000	100,000
Common Class A | Performance-Based Awards
Earnings Per Share Note [Line Items]
Number of shares not included because the performance criteria was not expected to be met | shares														10,000	10,000
Common Class B
Earnings Per Share Note [Line Items]
Net income per common share - basic													$ 15.73	$ 9.26	$ 7.90

[1] During the second, third and fourth quarter of 2019, the Company recorded $1.9 million, $5.9 million and $2.1 million in non-reoccurring transaction fees related to the Dogfish Head Transaction, respectively.