Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended												12 Months Ended
	Dec. 31, 2011	Nov. 30, 1997	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Restaurants Property Bank	Dec. 31, 2011	Dec. 31, 2010
Organization And Significant Accounting Policies [Line Items]
Date of formation															Dec. 19, 1985
Sale of Twentynine Palms property		$ 278,612
Number of restaurants commencing operation on acquired properties															10
Net proceeds from sale of property destroyed by fire																$ 1,231,720
Number of properties in operation															8
Percentage of General Partner interest in the profits or losses and distributions															1.00%
Number of units used in computing per unit amounts	47,261		47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261	47,261
Percentage of net income allocated to general partner															1.00%
Rental revenue percentage															12.00%
Number of properties leased															8
Commercial bank															1
Land improvements [Member]
Organization And Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment															20 years
Building Improvements [Member]
Organization And Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment															35 years
Machinery and equipment [Member]
Organization And Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment															10 years