Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Summary of Property, plant and equipment

Property, plant and equipment consist of the following:

	December 31,
	2017			2016
	(In thousands)
Land	$	224,894		$	240,719
Land use rights	26,845			26,845
Buildings and improvements	1,384,846			1,362,007
Machinery and equipment	4,938,291			4,483,523
Software and computer equipment	200,500			205,969
Furniture, fixtures and other equipment	15,722			21,313
Construction in progress	104,910			87,037
Total property, plant and equipment	6,896,008			6,427,413
Less accumulated depreciation and amortization	(4,200,943		)	(3,862,765		)
Total property, plant and equipment, net	$	2,695,065		$	2,564,648

The following table summarizes our depreciation expense:

	For the Year Ended December 31,
	2017		2016		2015
	(In thousands)
Depreciation expense	$	580,172	$	552,989	$	492,458