Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consist of the following:

(In thousands)	Estimated Useful Lives	December 31 2017			December 31 2016
Land	—	$	10,840		$	10,606
Land improvements	5-20 years	14,996			15,032
Buildings and improvements (a)	5-40 years	198,582			185,657
Machinery and equipment	3-20 years	1,599,713			1,525,156
Uncompleted construction	—	24,387			21,035
Gross property, plant and equipment		1,848,518			1,757,486
Less: Accumulated depreciation		(1,368,771		)	(1,267,231		)
Property, plant and equipment, net		$	479,747		$	490,255