Property, Plant and Equipment, and right-of-use assets (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment consists of the following:

	December 31,
	2019		2018
	(In thousands)
Land	$	33,654	$	26,108
Land rights and buildings	94,157		92,495
Plant and machinery	725,203		673,919
Other equipment, furniture and fixtures	30,965		28,460
Prepayments and construction in progress	138,374		98,096
Total property, plant and equipment	1,022,354		919,078
Less: accumulated depreciation	488,300		435,544
Net property, plant and equipment	$	534,054	$	483,534