Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 21, 2012
Mar. 25, 2012
Dec. 30, 2012
Dec. 25, 2011
Dec. 26, 2010
Commitments and Contingencies [Line Items]          
Payments to Sponsor     $ 2,094 $ 373 $ 375
Termination payment to Sponsor to terminate its advisory agreement 2,000 2,000 2,000    
Annually
         
Commitments and Contingencies [Line Items]          
Payments to Sponsor     $ 350