Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended												12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011 Property	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010 Property	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Restaurants Property Bank	Dec. 31, 2011 Property	Dec. 31, 2010 Property
Organization And Significant Accounting Policies [Line Items]
Date of formation													Nov. 30, 1982
Number of restaurants commencing operation on acquired properties													6
General partner interest in partnership													1.00%
Number of units used in computing per unit amounts	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751
Percentage of net income allocated to general partner													1.00%
Rental revenue percentage													12.00%
Number of properties leased				6				6					6	6	6
Number of major commercial banks													1
Land improvements [Member]
Organization And Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment													20 years
Buildings and 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