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Property, Plant, and Equipment
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant, and Equipment

Property, plant, and equipment consisted of:
 
December 31,
2013
 
December 31,
2012
Land and improvements
$
22,868

 
$
23,324

Buildings
57,555

 
61,410

Machinery and equipment
192,779

 
181,081

Construction in progress
3,948

 
4,941

Property, plant, and equipment, gross
277,150

 
270,756

Less accumulated depreciation
(147,036
)
 
(129,548
)
Property, plant, and equipment, net
$
130,114

 
$
141,208



Depreciation expense (including software amortization expenses disclosed below) for 2013, 2012, and 2011 was $19.9 million, $18.6 million, and $19.1 million, respectively.
As of December 31, 2013 and December 31, 2012, unamortized computer software costs totaling $6.7 million and $9.6 million, respectively, were recorded in property, plant and equipment. Amortization of capitalized computer software costs for 2013, 2012, and 2011 was $4.3 million, $3.5 million, and $3.4 million, respectively.