Inventories (Tables)

9 Months Ended

Sep. 30, 2021

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)	2021		2020		2020
Raw materials	$	149,488	$	100,198	$	95,777
In-process products	28,399		21,533		21,803
Finished products	207,625		138,323		166,162
	$	385,512	$	260,054	$	283,742