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Condensed Schedule of Investments (USD $)
Jun. 30, 2014
Cash Equivalents [Member]
  
% of Partners' Capital 47.79%
Market Values $ 26,008,078
Cash Equivalents [Member] | US Treasury Securities [Member]
  
% of Partners' Capital 33.07%
Market Values 17,997,306
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bill,0.03%, 8/28/2014 [Member]
  
% of Partners' Capital 9.19%
Principal Amount 5,000,000
Market Values 4,999,758
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.04%, 10/30/2014
  
% of Partners' Capital 9.18%
Principal Amount 5,000,000
Market Values 4,999,328
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.05%, 12/26/2014
  
% of Partners' Capital 14.70%
Principal Amount 8,000,000
Market Values 7,998,220
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
  
% of Partners' Capital 14.72%
Market Values 8,010,772
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund - Government Portfolio [Member]
  
% of Partners' Capital 6.45%
Principal Amount 3,510,274
Market Values 3,510,274
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
  
% of Partners' Capital 8.27%
Principal Amount 4,500,498
Market Values 4,500,498
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO August 2014 contracts, expiring July 2014 [Member]
  
Number of Contracts 484 [1]
Unrealized Gain On Open Commodity Contracts $ 1,699,100 [1]
% of Partners' Capital 3.12% [1]
[1] Collateral amounted to $1,573,065 on open future contracts.