Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2016

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)	2016			2015			2015
Land	$	30,217		$	28,899		$	28,698
Buildings and site improvements	176,430			172,300			171,890
Leasehold improvements	5,682			5,593			5,560
Machinery, equipment, and software	249,227			231,467			232,560
	461,556			438,259			438,708
Less accumulated depreciation and amortization	(275,096		)	(255,431		)	(257,115		)
	186,460			182,828			181,593
Capital projects in progress	43,210			20,057			32,123
	$	229,670		$	202,885		$	213,716