General and Basis of Presentation General and Basis of Presentation (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 Number_of_Limited_Partners	Sep. 30, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Investor Partners	489
Managing General Partner, Ownership Interest Before Unit Repurchases	20.00%
Investor Partner Ownership Interest	80.00%
Limited Partner Units Repurchased by Managing General Partner	45.2
Average Price Paid for Units Repurchased by Managing General Partner	$ 3,297
Managing General Partner Ownership Interest	26.50%
Annual Rate Of Return As Percentage Of Subscriptions	12.80%
Reduction In Distribution To Managing General Partner	$ 668	$ 2,561