Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of carrying values of inventories

Inventories at the dates indicated consisted of the following: 

	At June 30,				At December 31,
(in thousands)	2019		2018		2018
Raw materials	$	102,901	$	96,338	$	98,058
In-process products	25,145		27,847		24,645
Finished products	138,096		133,995		153,385
	$	266,142	$	258,180	$	276,088