Inventories (Tables)

12 Months Ended

Dec. 31, 2016

Inventory Disclosure [Abstract]

Summary of Inventories, at LIFO Value

Inventories (at LIFO value) consist of the following as of December 31 (in thousands):

	2016			2015
Finished goods	$	29,686		$	24,961
Raw materials		20,231			21,384
Total FIFO (first-in, first out) inventories		49,917			46,345
Reserve to adjust inventories to LIFO value		(21,371	)		(23,241	)
Total LIFO inventories	$	28,546		$	23,104