Inventories (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Schedule of carrying values of inventories

Inventories at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2020		2019		2019
Raw materials	$	89,903	$	91,850	$	95,575
In-process products	19,464		24,690		23,672
Finished products	146,353		155,919		132,660
	$	255,720	$	272,459	$	251,907