Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of carrying values of inventories

Inventories consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2016		2015		2015
Raw materials	$	82,056	$	84,040	$	75,950
In-process products	20,827		20,262		18,828
Finished products	107,904		101,010		100,979
	$	210,787	$	205,312	$	195,757