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Condensed Statement of Changes in Partners' Capital (USD $)
Total
General Partner [Member]
Limited Partner [Member]
Balances at Dec. 31, 2011 $ 37,268,388 $ 0 $ 37,268,388
Net asset value, beginning of period at Dec. 31, 2011 $ 74.54    
Addition of 600,000 partnership units 61,112,049 0 61,112,049
Redemption of 450,000 partnership units (49,903,149) 0 (49,903,149)
Net income (loss) (3,389,297) 0 (3,389,297)
Balances at Jun. 30, 2012 $ 45,087,991 $ 0 $ 45,087,991
Net asset value, end of period at Jun. 30, 2012 $ 69.37