Inventories (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2018

Dec. 31, 2017

Inventory, Net [Abstract]

Components of Inventories

Inventories consisted of the following:

(in thousands)	September 30, 2018			December 31, 2017
Raw materials	$	48,735		$	45,408
Work in progress		11,130			10,879
Finished goods		184,871			167,416
		244,736			223,703
LIFO and valuation adjustments		(25,603	)		(22,112	)
Inventories, net	$	219,133		$	201,591

The components of inventories were as follows:

	December 31, 2017			December 31, 2016
Raw materials	$	45,408		$	45,209
Work in progress		10,879			10,321
Finished goods		167,416			153,040
Subtotal		223,703			208,570
Less reserves		(22,112	)		(24,012	)
Total	$	201,591		$	184,558