Property, Plant and Equipment

3 Months Ended

Mar. 31, 2016

Property, Plant and Equipment [Abstract]

Property, Plant And Equipment

11.    Property, Plant and Equipment

Property, plant and equipment consist of the following:

	March 31, 2016			December 31, 2015
	(In thousands)
Land	$	241,920		$	237,815
Land use rights	26,845			26,845
Buildings and improvements	1,023,490			1,010,201
Machinery and equipment	4,281,561			4,226,401
Software and computer equipment	202,920			197,266
Furniture, fixtures and other equipment	21,198			21,259
Construction in progress	407,990			352,607
Total property, plant and equipment	6,205,924			6,072,394
Less accumulated depreciation and amortization	(3,589,697		)	(3,493,377		)
Total property, plant and equipment, net	$	2,616,227		$	2,579,017

Depreciation expense for the three months ended March 31, 2016 and 2015 was $136.5 million and $124.1 million, respectively.

As of March 31, 2016 and December 31, 2015, construction in progress reflects $361.3 million and $312.1 million of costs for K5, including capitalized interest of $23.0 million and $18.7 million, respectively.