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Leasing Activities - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2013
Restaurants
Property
Mar. 31, 2012
Restaurants
Number of properties leased 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 1,071,504 1,083,816
Combined unaudited net losses $ 47,482 $ 46,956
Number of restaurants operated 5