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CONTRACTS AND AGREEMENTS (Tables) | 9 Months Ended
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Sep. 30, 2017
Contractors [Abstract] |
Brokerage Commissions | USL also incurs commissions to brokers for the purchase and sale of Oil Futures Contracts, Other Oil-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”).
|  | For the nine months ended September 30, 2017 |  |  | For the nine months ended September 30, 2016 |
Total commissions accrued to brokers |  | $ | 13,484 |  |  | $ | 17,285 |
Total commissions as an annualized percentage of average total net assets |  |  | 0.02 | % |  |  | 0.02 | %
Commissions accrued as a result of rebalancing |  | $ | 10,815 |  |  | $ | 13,033 |
Percentage of commissions accrued as a result of rebalancing |  |  | 80.21 | % |  |  | 75.40 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 2,669 |  |  | $ | 4,252 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 19.79 | % |  |  | 24.60 | %

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