Leasing Activities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Restaurants	Jun. 30, 2013 Restaurants	Jun. 30, 2014 Restaurants	Jun. 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	1,433,641	1,400,659	2,793,678	2,703,426
Combined unaudited net losses	9,079	8	2,654	10,369
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Number of restaurants operated	1		1
Combined unaudited sales	$ 228,211	$ 223,568	$ 448,999	$ 429,308