Leasing Activities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Restaurants	Sep. 30, 2013 Restaurants	Sep. 30, 2014 Restaurants	Sep. 30, 2013 Restaurants
Operating Leased Assets [Line Items]
Number of restaurants leased to Del Taco	6	6	6	6
Number of properties subleased to Del Taco franchisee			1
Number of lease years			35 years
Percentage of gross sales of restaurants			12.00%
Leases expiration period			2020 to 2021
Minimum rentals due to Partnership			$ 3,500
Number of restaurants operated	5		5
Combined unaudited sales	1,489,919	1,400,297	4,283,597	4,103,722
Combined unaudited net income (losses)	15,164	(78)	12,510	(10,448)
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Number of restaurants operated	1		1
Combined unaudited sales	$ 237,555	$ 225,790	$ 686,554	$ 655,097