Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consists of the following:

(In thousands)	March 31 2018			December 31 2017
Land	$	10,828		$	10,840
Land improvements	14,866			14,996
Buildings and improvements	202,273			198,582
Machinery and equipment	1,643,743			1,599,713
Uncompleted construction	23,095			24,387
Gross property, plant and equipment	1,894,805			1,848,518
Less: Accumulated depreciation	(1,411,968		)	(1,368,771		)
Property, plant and equipment, net	$	482,837		$	479,747