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Reconciliation of Assets to Relevant Consolidated Amount (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 01, 2012
Sep. 04, 2012
Jun. 02, 2012
Dec. 03, 2011
Sep. 03, 2011
May 28, 2011
Segment Reporting, Asset Reconciling Item [Line Items]            
Cash $ 53,518 $ 41,238 $ 43,893 $ 25,182 $ 37,236 $ 170,975
Investments-current 86,395   105,009      
Other current assets 11,941 [1]   10,723 [1]      
Net property 4,438   4,375      
Investments-non-current 7,380   10,683      
Other assets 1,474 [2]   1,458 [2]      
Assets of discontinued operations 248 [3]   514 [3]      
Total assets 222,649   231,423      
Reportable Segment
            
Segment Reporting, Asset Reconciling Item [Line Items]            
Total assets $ 57,255   $ 54,768      
[1] Other current assets include miscellaneous receivables, prepaid expenses, and current deferred income taxes.
[2] Other assets primarily include non-current deferred income taxes.
[3] See Footnote 4-Discontinued Operations.