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Investment in Direct Financing Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2012
Dec. 30, 2011
Jun. 24, 2011
Leases Disclosure [Line Items]      
Total minimum lease payments receivable $ 3,522   $ 2,026
Estimated residual values of leased equipment        
Investment in direct financing leases 3,522   2,026
Less: unearned income (186)   (415)
Capital Leases, Net Investment in Direct Financing Leases, Total 3,336   1,611
Less: written-off of investment in direct financing leases (3,336) (3,336)  
Net investment in direct financing leases     $ 1,611