Leasing Activities - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2014 Restaurants	Mar. 31, 2013 Restaurants
Operating Leased Assets [Line Items]
Number of restaurants leased to Del Taco	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
Combined unaudited sales	581,837	551,995
Combined unaudited net losses	4,402	1,272
Del Taco franchisee [Member]
Operating Leased Assets [Line Items]
Number of restaurants operated	1
Combined unaudited sales	$ 332,515	$ 317,916

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 25

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682

Name:	us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration