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Inventories

3 Months Ended

Mar. 31, 2016

4.Inventories

Inventories consist of the following at March 31, 2016 and December 31, 2015, respectively:

	March 31,			December 31,
	2016			2015
Raw materials	$	93,610		$	101,250
Work in process	5,642			6,165
Finished goods	156,344			149,774
Replacement parts and supplies	80,559			79,717

Inventory at FIFO costs	336,155			336,906
LIFO inventory reserves	(1,099		)	(1,003		)

Inventories	$	335,056		$	335,903