Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Property, plant and equipment consist of the following:

In thousands	June 30, 2017			December 31, 2016
Land	$	9,417		$	7,878
Facilities and equipment	655,366			650,480
Assets under capital leases	64,221			54,968
	729,004			713,326
Accumulated amortization (1)	(538,260		)	(524,806		)
	190,744			188,520
Construction in progress	36,994			28,276
Property, plant and equipment, net	$	227,738		$	216,796

(1) Includes $19.6 million of accumulated amortization related to assets under capital leases.