Debt - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended		12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010	Dec. 29, 2012 Revolving Credit Facilities	Jun. 29, 2012 Revolving Credit Facilities	Dec. 29, 2012 Revolving Credit Facilities Minimum	Jun. 29, 2012 Revolving Credit Facilities Minimum	Dec. 29, 2012 Revolving Credit Facilities Maximum	Dec. 29, 2012 Revolving Credit Facilities Maximum Maximum Leverage ration beyond which amount of cash dividends and other distributions to stockholders is limited	Dec. 29, 2012 Letter of Credit	Jun. 29, 2012 Letter of Credit	Jun. 29, 2012 Prior Credit Agreement
Debt Instrument [Line Items]
Credit facility, initiation date				Jun. 29, 2012
Credit facility, expiration date				Jun. 29, 2017
Credit facility, borrowing capacity				$ 225,000,000	$ 225,000,000					$ 75,000,000	$ 75,000,000
Credit Facility, borrowing					60,000,000							60,000,000
Credit facility, unused credit commitment fee						0.15%		0.35%
Weighed average Interest rate on borrowing				1.22%
Leverage Ratio									2.5
Credit facility event of default, minimum percentage that a person or group should acquire outstanding capital stock						25.00%	25.00%
Credit facility, debt covenants compliance						The Company is currently in compliance with all of the debt covenants under the Credit Agreement
Interest paid	$ 3,156,000	$ 3,133,000	$ 3,785,000