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Condensed Statement of Changes in Partners' Capital (USD $)
General Partner [Member]
Limited Partner [Member]
Total
Balances, at Dec. 31, 2011 $ 0 $ 37,268,388 $ 37,268,388
Net Asset Value, beginning of period at Dec. 31, 2011 $ 74.54   $ 74.54
Addition of 1,000,000 partnership units 0 80,992,276 80,992,276
Redemption of 800,000 partnership units 0 (65,544,533) (65,544,533)
Net income 0 4,123,551 4,123,551
Balances, at Sep. 30, 2012 $ 0 $ 56,839,682 $ 56,839,682
Net Asset Value Per Unit: at Sep. 30, 2012 $ 81.20   $ 81.20