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Condensed Statement of Changes in Partners' Capital (USD $)
Total
General Partner [Member]
Limited Partner [Member]
Balances, at December 31, 2012 at Dec. 31, 2012 $ 45,072,621 $ 0 $ 45,072,621
Net asset value, beginning of period at Dec. 31, 2012 $ 81.95    
Addition of 500,000 partnership units 41,878,777 0 41,878,777
Redemption of 550,000 partnership units (45,759,062) 0 (45,759,062)
Net loss (2,308,059) 0 (2,308,059)
Balances, at June 30, 2013 at Jun. 30, 2013 $ 38,884,277 $ 0 $ 38,884,277
Net asset value, end of period at Jun. 30, 2013 $ 77.77