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Subsequent Events (Details) (USD $)	6 Months Ended
Subsequent Events (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012
Subsequent Events
Redemptions	$ 82,191,402	$ 97,210,099
Contributions	18,974,662	21,950,721
Subsequent event
Subsequent Events
Redemptions	13,000
Contributions	$ 3,005,000

- Definition

Total contributions made by each class of partners (i.e., general, limited and preferred partners).

+ References+ Details

- Definition

Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

+ References+ Details