Net Income per Share - Additional Information (Detail)	12 Months Ended
	Dec. 25, 2021 $ / shares shares	Dec. 26, 2020 shares $ / shares	Dec. 28, 2019 $ / shares shares
Earnings Per Share Note [Line Items]
Net income per common share - basic | $ / shares	$ 1.19	$ 15.73	$ 9.26
Conversion ratio for Class B to Class A shares		1
Performance-Based Awards
Earnings Per Share Note [Line Items]
Number of shares not included because the performance criteria was not expected to be met	1,000	0
Common Class A
Earnings Per Share Note [Line Items]
Net income per common share - basic | $ / shares	$ 1.19	$ 15.73	$ 9.26
Antidilutive securities excluded from computation of earnings per share	17,000	0	23,000
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		0	10,000
Common Class B
Earnings Per Share Note [Line Items]
Net income per common share - basic | $ / shares	$ 1.19	$ 15.73	$ 9.26