Property, Plant And Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant And Equipment [Abstract]

Property, Plant and Equipment

	2019		2018
	(Dollars in thousands)
Land	$	35,564	$	36,460
Buildings		152,586		152,221
Machinery and equipment		427,081		401,038
Construction in progress		92,442		71,079
Total property, plant and equipment		707,673		660,798
Total accumulated depreciation		(407,668)		(385,259)
Property, plant and equipment, net	$	300,005	$	275,539