Leasing Activities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013 Restaurants	Sep. 30, 2012 Restaurants	Sep. 30, 2013 Restaurants	Sep. 30, 2012 Restaurants
Operating Leased Assets [Line Items]
Number of restaurants leased to Del Taco	3	3	3	3
Number of properties subleased to Del Taco franchisee			1
Number of lease years			32 years
Percentage of gross sales of restaurants			12.00%
Leases expiration period			2021 to 2022
Minimum rentals due to Partnership			$ 3,500
Number of restaurants operated	2		2
Combined unaudited sales	586,926	568,310	1,716,457	1,663,410
Combined unaudited net income (loss)	(5,195)	4,127	(5,700)	1,170
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Number of restaurants operated	1		1
Combined unaudited sales	$ 337,015	$ 335,936	$ 993,862	$ 974,550