Organization (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Feb. 05, 1993	May 31, 1991
Capital Units, Value				$ 1,000
Limited Partners' Capital Account, Units Outstanding (in Shares)	20,166	20,166	21,151.928	1,500
Limited Partners' Contributed Capital			21,151,928	1,500,000
General Partners' Contributed Capital			$ 1,000