Commitments and Contingencies (Detail) (USD $)	12 Months Ended
	Dec. 25, 2011	Mar. 25, 2012 Contract
Loss Contingencies [Line Items]
Number of lease agreements the company is contingently liable		40
Estimated amount of undiscounted payments, maximum		$ 2,000,000
Other general expenses, remaining rentals, taxes and insurance related to leases	$ 800,000
Majority Expiration [Member]
Loss Contingencies [Line Items]
Lease expiration, year		2015