Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Components of inventory

Components of inventories at March 31, 2016 and December 31, 2015 were as follows: 

	March 31, 2016		December 31, 2015
Natural gas liquids	$	9,439	$	20,959
Sulfur	11,327		13,812
Sulfur based products	15,692		19,400
Lubricants	18,359		18,675
Other	3,087		3,024
	$	57,904	$	75,870