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CONTRACTS AND AGREEMENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
Contracts and Agreements [Abstract] |
Brokerage Commissions | UNL also incurs commissions to brokers for the purchase and sale of natural gas Futures Contracts, Other Natural Gas-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”).
|  | For the Year Ended December 31, 2017 |  |  | For the Year Ended December 31, 2016 |  |  | For the Year Ended December 31, 2015 |
Total commissions accrued to brokers |  | $ | 2,209 |  |  | $ | 3,451 |  |  | $ | 6,117 |
Total commissions as annualized percentage of average total net assets |  |  | 0.02 | % |  |  | 0.03 | % |  |  | 0.04 | %
Commissions accrued as a result of rebalancing |  | $ | 1,605 |  |  | $ | 3,305 |  |  | $ | 4,698 |
Percentage of commissions accrued as a result of rebalancing |  |  | 72.66 | % |  |  | 95.77 | % |  |  | 76.80 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 604 |  |  | $ | 146 |  |  | $ | 1,419 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 27.34 | % |  |  | 4.23 | % |  |  | 23.20 | %

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