Leasing Activities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Restaurants	Jun. 30, 2012 Restaurants	Jun. 30, 2013 Restaurants Property	Jun. 30, 2012 Restaurants
Operating Leased Assets [Line Items]
Number of lease years			35 years
Percentage of gross sales of the restaurants			12.00%
Leases expiration date			2020 to 2021
Number of properties leased	6	6	6	6
Number of properties subleased to Del Taco franchisee			1
Minimum rentals due per month to Partnership			$ 3,500
Combined unaudited sales	1,400,659	1,322,777	2,703,426	2,608,127
Combined unaudited net losses	8	4,085	10,369	13,832
Number of restaurants operated	5		5
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Combined unaudited sales	$ 223,568	$ 217,111	$ 429,308	$ 427,117
Number of restaurants operated	1		1