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	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 Bank	Dec. 31, 2011	Dec. 31, 2010
Organization And Summary Of Significant Accounting Policies [Line Items]
Date of formation													Jun. 20, 1984
Mexican-American restaurants													7
Percentage of general partner interest in the profits or losses and distributions													1.00%
Percentage of net income allocated to general partner													1.00%
Number of units used in computing per unit amounts	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006	27,006
Rental revenue percentage													12.00%
Restaurants leased													5
Commercial bank													1
Land improvements [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment													20 years
Buildings and improvements [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment													35 years
Machinery and equipment [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives property and equipment													10 years