Major Customers (Tables)

12 Months Ended

Dec. 31, 2016

Risks And Uncertainties [Abstract]

Schedules of Percentages of Revenues and Receivables Associated with Significant Customers

The following table presents the percentage of revenues and receivables associated with the Partnership’s significant customers (those that have accounted for 10% or more of the Partnership’s revenues in a given period) for the periods indicated:

	% of Revenues									% of Receivables
	For the Year Ended December 31,									As of December 31,
	2016			2015			2014			2016			2015
ExxonMobil Oil Corporation		33	%		27	%		2	%		32	%		30	%
Chevron U.S.A. Inc.		12	%		16	%		19	%		11	%		12	%
Center Oil		6	%		8	%		13	%		7	%		6	%
Total percentages associated with    significant customers		51	%		51	%		34	%		50	%		48	%