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Condensed Schedule of Investments (USD $)	Jun. 30, 2012
Unrealized Gain (Loss) on Open Commodity Contracts	$ (8,462,260)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States
Number of Contracts	1,262
Unrealized Gain (Loss) on Open Commodity Contracts	(8,462,260)
% of Partners' Capital	(7.70%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL August 2012 contracts, expiring July 2012
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(1,031,450)
% of Partners' Capital	(0.94%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL September 2012 contracts, expiring August 2012
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(366,370)
% of Partners' Capital	(0.33%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL October 2012 contracts, expiring September 2012
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(454,870)
% of Partners' Capital	(0.41%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL November 2012 contracts, expiring October 2012
Number of Contracts	106
Unrealized Gain (Loss) on Open Commodity Contracts	(140,600)
% of Partners' Capital	(0.13%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL December 2012 contracts, expiring November 2012
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(615,790)
% of Partners' Capital	(0.56%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL January 2013 contracts, expiring December 2012
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(950,030)
% of Partners' Capital	(0.87%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL February 2013 contracts, expiring January 2013
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(1,012,150)
% of Partners' Capital	(0.92%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL March 2013 contracts, expiring February 2013
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(1,013,640)
% of Partners' Capital	(0.92%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | NYMEX Crude Oil Futures CL April 2013 contracts, expiring March 2013
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(1,263,910)
% of Partners' Capital	(1.15%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | Nymex Crude Oil Futures Cl May Twenty Thirteen Contracts Expiring April Twenty Thirteen
Number of Contracts	106
Unrealized Gain (Loss) on Open Commodity Contracts	(1,195,340)
% of Partners' Capital	(1.09%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | Nymex Crude Oil Futures Cl June Twenty Thirteen Contracts Expiring May Twenty Thirteen
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	(648,940)
% of Partners' Capital	(0.59%)
Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long | United States | Nymex Crude Oil Futures Cl July Twenty Thirteen Contracts Expiring June Twenty Thirteen
Number of Contracts	105
Unrealized Gain (Loss) on Open Commodity Contracts	230,830
% of Partners' Capital	0.21%
Cash Equivalents
Market Value	80,140,350
% of Partners' Capital	72.92%
Cash Equivalents | United States | US Treasury Securities | U.S. Treasury Bill
Principal Amount	8,000,000
Market Value	7,997,978
% of Partners' Capital	7.28%
Cash Equivalents | United States | Money Market Funds
Market Value	72,142,372
% of Partners' Capital	65.64%
Cash Equivalents | United States | Money Market Funds | Fidelity Institutional Government Portfolio, Class I
Principal Amount	10,161,328
Market Value	10,161,328
% of Partners' Capital	9.24%
Cash Equivalents | United States | Money Market Funds | Goldman Sachs Financial Square Funds, Government Fund, Class SL
Principal Amount	6,451,797
Market Value	6,451,797
% of Partners' Capital	5.87%
Cash Equivalents | United States | Money Market Funds | Morgan Stanley Institutional Liquidity Fund, Government Portfolio
Principal Amount	30,529,247
Market Value	30,529,247
% of Partners' Capital	27.78%
Cash Equivalents | United States | Money Market Funds | Wells Fargo Advantage Government Money Market Fund Class I
Principal Amount	25,000,000
Market Value	$ 25,000,000
% of Partners' Capital	22.75%

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