Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2020

Property Plant And Equipment [Abstract]

Property, Plant and Equipment

At September 30, 2020 and December 31, 2019, property, plant and equipment consisted of the following:

	September 30,			December 31,
(In thousands)	2020			2019
Land	$	4,575		$	4,575
Building and land improvements		35,105			34,797
Building		68,160			68,157
Furniture and fixtures		19,981			19,959
Computer hardware and software		70,766			68,777
Engineering and other equipment		132,672			130,430
Total property, plant and equipment		331,259			326,695
Less: accumulated depreciation		(266,906	)		(258,609	)
Total property, plant and equipment, net	$	64,353		$	68,086