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Carrying Amounts and Fair Values of Certain Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 07, 2014
Dec. 29, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, carrying amount $ 21,108 $ 5,303
Restricted cash equivalents, carrying amount 54,834 93,608
Investments in marketable securities, carrying amount 4,365 3,269
Fair Value, Inputs, Level 1 [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents, fair value 21,108 5,303
Restricted cash equivalents, fair value 54,834 93,608
Investments in marketable securities, carrying amount $ 4,365 $ 3,269