CONTRACTS AND AGREEMENTS (Tables)

12 Months Ended

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	%