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Schedule of Investments (USD $)
Dec. 31, 2013
Dec. 31, 2012
Cash Equivalents [Member]
    
% of Partners' Capital 45.69% 90.33%
Market Values $ 12,010,110 $ 40,715,676
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bill [Member]
    
% of Partners' Capital 15.22% 5.99%
Principal Amount 4,000,000 2,700,000
Market Values 3,999,339 2,699,886
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
    
% of Partners' Capital 30.47% 84.34%
Market Values 8,010,771 38,015,790
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Institutional Government Portfolio - Class I [Member]
    
% of Partners' Capital   12.21%
Principal Amount   5,502,749
Market Values   5,502,749
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
    
% of Partners' Capital   24.41%
Principal Amount   11,002,270
Market Values   11,002,270
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund - Government Portfolio [Member]
    
% of Partners' Capital 13.35% 25.53%
Principal Amount 3,510,274 11,510,274
Market Values 3,510,274 11,510,274
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
    
% of Partners' Capital 17.12% 22.19%
Principal Amount 4,500,497 10,000,497
Market Values 4,500,497 10,000,497
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO February 2014 contracts, expiring January 2014 and February 2013 contracts, expiring January 2013 [Member]
    
Number of Contracts 237 [1] 406 [2]
Unrealized Gain Loss On Open Commodity Contracts $ 28,670 [1] $ 739,330 [2]
% of Partners' Capital 0.11% [1] 1.64% [2]
[1] Collateral amounted to $3,271,010 on open futures contracts.
[2] Collateral amounted to $4,934,188 on open futures contracts.