Inventories (Tables)

3 Months Ended

Sep. 30, 2020

Inventory Disclosure [Abstract]

Schedule of carrying values of inventories

Inventories at the dates indicated consisted of the following: 

	At September 30,				At December 31,
(in thousands)	2020		2019		2019
Raw materials	$	100,198	$	91,088	$	95,575
In-process products	21,533		24,554		23,672
Finished products	138,323		127,088		132,660
	$	260,054	$	242,730	$	251,907