Distributions and Amount of Income Per Five Thousand Participation Unit - Schedule of Distributions and Amount of Income Per Participation Unit (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Distribution Made to Member or Limited Partner [Line Items]
Income	$ 2,733	$ 4,559
Return of capital	836
Total distributions	$ 3,569	$ 4,559