Net Income Per Limited Partnership Unit - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Number of units used in computing per unit amounts	27,006	27,006
Percentage of net income allocated to general partner	1.00%
Percentage of net income attributable limited partners	99.00%
Percentage of gain on sale and refinancing allocated to general partner	1.00%
Percentage of gain on sale and refinancing allocated to limited partners	99.00%
Percentage of additional gain on sale and refinancing allocated to general partner	15.00%
Percentage of additional gain on sale and refinancing allocated to limited partners	85.00%