Major Customers and Suppliers

12 Months Ended

Dec. 31, 2014

(19) Major Customers and Suppliers

Sales to major customers as a percentage of the respective segment's sales were as follows:



	Year Ended December 31,
	2014		2013		2012
Petroleum
Customer A	13	%	12	%	10	%
Nitrogen Fertilizer
Customer B	17	%	15	%	10	%
Customer C	10	%	13	%	10	%
	27	%	28	%	20	%

The petroleum segment obtained crude oil from one third-party supplier under a long-term supply agreement during 2014, 2013 and 2012. The crude oil purchased from this supplier is governed by a long-term contract. Volume contracted as a percentage of the total crude oil purchases (in barrels) for each of the periods was as follows:



	Year Ended December 31,
	2014		2013		2012
Petroleum
Supplier A	67	%	69	%	45	%

The nitrogen fertilizer segment maintains long-term contracts with one third-party supplier. Purchases from this supplier as a percentage of direct operating expenses (exclusive of depreciation and amortization) were as follows:



	Year Ended December 31,
	2014		2013		2012
Nitrogen Fertilizer
Supplier B	4	%	4	%	5	%