Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant, and Equipment

The components of property, plant and equipment are summarized below:

(in thousands)	2013		2012		Estimated useful life
Land and land improvements	$27,081		$26,985		25 years for improvements
Buildings	240,849		244,104		25 to 40 years
Machinery and equipment	903,037		863,811		10 years
Furniture and fixtures	6,818		7,249		5 years
Computer and other equipment	12,843		11,946		3 to 10 years
Software	50,246		47,576		5 to 8 years
Property, plant and equipment, gross	1,240,874		1,201,671
Accumulated depreciation	(822,044	)	(781,517	)
Property, plant and equipment, net	$418,830		$420,154