Property, Plant and Equipment

3 Months Ended

Mar. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant And Equipment

11.    Property, Plant and Equipment

Property, plant and equipment consist of the following:

	March 31, 2015			December 31, 2014
	(In thousands)
Land	$	207,985		$	207,985
Land use rights	26,845			26,845
Buildings and improvements	944,246			940,846
Machinery and equipment	3,977,069			3,953,891
Software and computer equipment	186,868			185,243
Furniture, fixtures and other equipment	16,274			15,347
Construction in progress	64,324			39,261
Total property, plant and equipment	5,423,611			5,369,418
Less accumulated depreciation and amortization	(3,255,821		)	(3,162,942		)
Total property, plant and equipment, net	$	2,167,790		$	2,206,476

Depreciation expense was $124.1 million and $108.0 million for the three months ended March 31, 2015 and March 31, 2014, respectively.

During 2013, we purchased land for a factory and research and development center in Korea ("K5") for $104.1 million. In 2014, we commenced construction activities and incurred costs of $29.8 million, including capitalized interest of $8.6 million, which is reflected in construction in progress. As of March 31, 2015, construction in progress reflects $49.9 million of costs, including capitalized interest of $10.8 million.