Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment, net, at the dates indicated consisted of the following: 

	At September 30,						At December 31,
(in thousands)	2019			2018			2018
Land	$	29,132		$	30,173		$	30,034
Buildings and site improvements	197,075			203,323			198,809
Leasehold improvements	4,909			4,694			4,826
Machinery, equipment, and software	345,861			323,091			330,076
	576,977			561,281			563,745
Less accumulated depreciation and amortization	(339,920		)	(316,768		)	(318,388		)
	237,057			244,513			245,357
Capital projects in progress	13,893			13,166			9,240
	$	250,950		$	257,679		$	254,597