Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Depreciation is calculated using the straight-line method typically over the following range of estimated useful lives of the assets:

Asset	Useful Life
Buildings	15 to 40 years
Machinery and equipment	3 to 20 years
Leasehold improvements	Over the shorter of their estimated useful lives or the terms of the applicable lease agreements

Property, plant and equipment as of December 31, 2018 and 2017 consisted of the following:

	December 31
	2018			2017
	(In thousands)
Land	$	162,326		$	175,243
Buildings	642,986			677,827
Leasehold improvements	84,320			83,366
Machinery and equipment	1,873,505			1,867,168
Construction in progress	45,349			29,952
	2,808,486			2,833,556
Less accumulated depreciation	(1,802,304		)	(1,739,492		)
Total	$	1,006,182		$	1,094,064