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Leasing Activities - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Restaurants
Property
Sep. 30, 2011
Restaurants
Sep. 30, 2012
Restaurants
Property
Sep. 30, 2011
Restaurants
Number of properties leased 5 5 5 5
Number of Lease years     35 years  
Percentage of gross sales of the restaurants     12.00%  
Leases expiration date     2021 to 2023  
Minimum rentals due to partnership     $ 3,500  
Combined unaudited sales 1,126,739 1,139,760 3,333,816 3,370,004
Combined unaudited net losses $ 28,811 $ 17,298 $ 108,277 $ 105,765
Number of restaurants operated 5   5