Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Summary of Carrying Values of Property, Plant and Equipment

The carrying values of property, plant and equipment were as follows: 

	December 31,
	2020		2019
	(In thousands)
Land and land improvements	$	29,321	$	27,502
Buildings and leasehold improvements	136,427		126,580
Machinery and equipment	608,618		558,639
Computer equipment and software	137,512		119,533
Construction in process	63,589		70,993
Gross property, plant and equipment	975,467		903,247
Accumulated depreciation	(606,847)		(557,329)
Net property, plant and equipment	$	368,620	$	345,918