Property, Plant and Equipment

12 Months Ended

Dec. 31, 2013

4. 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

During the third quarter of 2012, the Company announced the closure or potential sale of its Datong, China virgin carbon manufacturing facility and recorded a $3.6 million impairment charge. This facility was sold in March 2013 (refer to Note 2).

Depreciation expense for the years ended December 31, 2013, 2012, and 2011 totaled $26.8 million, $24.3 million, and $22.6 million, respectively.

Repair and maintenance expenses were $16.4 million, $18.4 million, and $15.0 million for the years ended December 31, 2013, 2012, and 2011, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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