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Inventories

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories

	June 30, 2017				December 31, 2016
Raw materials	$	52,146			$	68,900
Work in progress	42,999				47,759
Finished goods	41,197				19,069
Spares and other	23,472				23,129
	159,814				158,857
Reduction to LIFO cost basis	(28,327		)		(29,879		)
Total inventories	$	131,487			$	128,978

The increase in the total amount of inventories at June 30, 2017 compared to December 31, 2016 is due primarily to lower levels of finished goods in the fourth quarter of 2016 as a result of the plant turnaround activities offset partially by lower levels of raw materials as of June 30, 2017 due to timing of cumene purchases.

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- References

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- Definition

The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-URI http://asc.fasb.org/topic&trid=2126998

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