Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

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, 2015 and 2014 consisted of the following:

	December 31
	2015			2014
	(In thousands)
Land	$	174,620		$	174,654
Buildings	666,697			646,098
Leasehold improvements	76,985			76,389
Machinery and equipment	1,850,012			1,809,037
Construction in progress	32,116			34,587
	2,800,430			2,740,765
Less accumulated depreciation	(1,626,293		)	(1,568,169		)
Total	$	1,174,137		$	1,172,596