Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2022

Property Plant And Equipment [Abstract]

Schedule of Property, Plant and Equipment

	March 31, 2022			December 31, 2021
(Dollars in thousands)
Land and buildings	$	131,489		$	129,826
Machinery and equipment		884,009			861,097
Leasehold improvements and others		9,741			9,831
Construction in progress		62,250			67,529
		1,087,489			1,068,283
Accumulated depreciation		(595,642	)		(573,882	)
Property, plant and equipment, net	$	491,847		$	494,401