Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2019			2018
	(In thousands)
Land and land improvements	$	27,502		$	25,902
Buildings and leasehold improvements	126,580			120,896
Machinery and equipment	558,639			523,857
Computer equipment and software	119,533			121,504
Construction in process	70,993			56,483
Gross property, plant and equipment	903,247			848,642
Accumulated depreciation	(557,329		)	(537,682		)
Net property, plant and equipment	$	345,918		$	310,960