Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories valued at LIFO (last-in, first-out), consist of the following (in thousands):

	March 31, 2018			December 31, 2017
Finished goods	$	39,788		$	32,986
Raw materials		20,801			19,432
Total FIFO (first-in, first-out) inventories		60,589			52,418
Reserve to adjust inventories to LIFO value		(20,070	)		(20,070	)
Total LIFO inventories	$	40,519		$	32,348