Organization (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Oct. 19, 2007	Mar. 15, 2005
Limited Partners' Capital Account, Units Outstanding (in Shares)	1,792,925	1,827,736
Limited Member [Member]
Capital Units, Value					$ 10
Limited Partners' Capital Account, Units Outstanding (in Shares)	1,792,925.0	1,827,736.0	1,827,736.0	1,832,736	150,000
Limited Partners' Contributed Capital				18,327,360	1,500,000
Managing Member [Member]
General Partners' Contributed Capital				$ 1,000