Leasing Activities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Property Restaurants	Dec. 31, 2011 Property	Dec. 31, 2010 Property
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
Minimum rentals due per month to Partnership	$ 3,500
Number of properties leased	6	6	6
Number of properties subleased to Del Taco franchisee	1	1	1
Number of restaurants operated	5
Combined Unaudited Sales	5,284,393	5,207,992	5,294,904
Combined unaudited net loss	(22,807)	(17,429)	(48,766)
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Number of restaurants operated	1
Combined Unaudited Sales	$ 863,302	$ 908,346	$ 954,561