Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment and depreciation expense

Property, plant and equipment consist of the following:

	March 31, 2018			December 31, 2017
	(In thousands)
Land	$	226,966		$	224,894
Land use rights	26,845			26,845
Buildings and improvements	1,443,232			1,384,846
Machinery and equipment	5,025,054			4,938,291
Software and computer equipment	203,945			200,500
Furniture, fixtures and other equipment	16,036			15,722
Construction in progress	95,718			104,910
Total property, plant and equipment	7,037,796			6,896,008
Accumulated depreciation and amortization	(4,309,918		)	(4,200,943		)
Total property, plant and equipment, net	$	2,727,878		$	2,695,065

The following table summarizes our depreciation expense:

	For the Three Months Ended March 31,
	2018		2017
	(In thousands)
Depreciation expense	$	142,004	$	141,456