Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consists of the following:

December 31, (dollars in thousands)	2014		2013
Land	$	20,353	$	21,452
Buildings	97,485		89,734
Machinery and equipment	448,241		459,244
Furniture and fixtures	15,431		14,468
Software	19,950		20,490
Construction in progress	34,134		17,064
Gross property, plant and equipment	635,594		622,452
Less accumulated depreciation	357,616		356,790
Net property, plant and equipment	$	277,978	$	265,662