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Contracts and Agreements (Tables) | 12 Months Ended
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Dec. 31, 2015
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 Year Ended December 31, 2015 |  |  | For the Year Ended December 31, 2014 |  |  | For the Year Ended December 31, 2013 |
Total commissions accrued to brokers |  | $ | 19,025 |  |  | $ | 4,643 |  |  | $ | 9,848 |
Total commissions as annualized percentage of average total net assets |  |  | 0.03 | % |  |  | 0.01 | % |  |  | 0.01 | %
Commissions accrued as a result of rebalancing |  | $ | 11,997 |  |  | $ | 3,665 |  |  | $ | 4,473 |
Percentage of commissions accrued as a result of rebalancing |  |  | 63.06 | % |  |  | 78.94 | % |  |  | 45.42 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 7,028 |  |  | $ | 978 |  |  | $ | 5,375 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 36.94 | % |  |  | 21.06 | % |  |  | 54.58 | %

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- Definition Tabular disclosure of fees earned by the broker commission. + References No definition available. + Details
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