Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories

The components of inventories at December 31 were as follows (in thousands):

	2017			2016
Raw materials and supplies	$	132,949		$	113,632
Work in process	27,649			24,290
Finished products	82,445			81,263
Inventory reserves	(38,110		)	(37,233		)
	$	204,933		$	181,952