Net Income per Share - Additional Information (Detail) (USD $)	3 Months Ended											12 Months Ended
	Dec. 29, 2012		Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011		Sep. 24, 2011	Jun. 25, 2011		Mar. 26, 2011	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Earnings Per Share Disclosure [Line Items]
Net income per common share - basic	$ 1.31	[1]	$ 1.60	$ 1.11	$ 0.59	$ 1.41	[2]	$ 1.26	$ 2.12	[3]	$ 0.30	$ 4.60	$ 5.08	$ 3.67
Conversion ratio for Class B to Class A shares	1											1
Number of shares not included because the performance criteria was not met												4,550
Common Class A
Earnings Per Share Disclosure [Line Items]
Net income per common share - basic												$ 4.60	$ 5.08	$ 3.67
Antidilutive securities excluded from computation of earnings per share												271,000	213,000	17,600
Common Class A | Performance-Based Options
Earnings Per Share Disclosure [Line Items]
Number of shares not included because the performance criteria was not expected to be met												(60,000)	(65,000)	(100,000)
Number of shares not included because the performance criteria was not met												4,550	219,700

[1] During the fourth quarter of 2012, the Company recorded $3.5 million of promotional expenses as contra revenue which had previously been included in Advertising, promotional and selling expenses.

[2] During the fourth quarter of 2011, the Company recorded a $2.1 million decrease in its tax liabilities as a result of a state tax audit settlement and a $1.5 million decrease in its liability for refundable deposits for lost kegs and pallets.

[3] During the second quarter of 2011, the Company entered into a settlement agreement with its former glass supplier. The Company received a cash payment of $20.5 million which was recorded as an offset to operating expenses.