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Property, Plant, and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant, and Equipment

Property, plant, and equipment consisted of:

 
December 31,
2012
 
December 30,
2011
Land and improvements
$
23,324

 
$
22,865

Buildings
61,410

 
57,522

Machinery and equipment
181,081

 
169,901

 
265,815

 
250,288

Less accumulated depreciation
(129,548
)
 
(106,472
)
 
136,267

 
143,816

Construction in progress
4,941

 
2,733

 
$
141,208

 
$
146,549



Depreciation expense (including software amortization expenses disclosed below) for 2012, 2011, and 2010 was $18.6 million, $19.1 million, and 18.9 million, respectively.

As of December 31, 2012 and December 30, 2011, unamortized computer software costs totaling $9.6 million and $13.0 million, respectively, were recorded in property, plant and equipment. Amortization of capitalized computer software costs for 2012, 2011, and 2010 was $3.5 million, $3.4 million, and $2.9 million, respectively.