Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment

Schedule of property, plant and equipment

	December 31
(Dollars in thousands)	2013			2012
Land and improvements	$	27,731		$	24,625
Buildings	70,433			69,821
Machinery, equipment and customer capital	462,300			405,774
Computer hardware and software	26,816			21,267
Furniture and vehicles	9,749			8,891
Construction-in-progress	27,836			65,912
	624,865			596,290
Less accumulated depreciation	(358,016		)	(333,297		)
Net	$	266,849		$	262,993