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
Operating Leased Assets [Line Items]
Number of properties leased	6	6	6	6
Number of properties subleased to Del Taco franchisee			1
Number of Lease years			35 years
Percentage of gross sales of the restaurants			12.00%
Leases expiration date			2020 to 2021
Minimum rentals due to partnership			$ 3,500
Number of restaurants operated	5		5
Combined Unaudited Sales	1,354,723	1,323,105	3,962,850	3,915,976
Combined unaudited net loss	1,003	(2,302)	(12,829)	(4,535)
Deltaco Franchisee
Operating Leased Assets [Line Items]
Number of restaurants operated			1
Combined Unaudited Sales			$ 219,840	$ 224,898