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Property and Equipment
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and equipment are summarized as follows (in thousands):
 
Estimated
Useful Life
 
December 31,
 
2014
 
2013
Land
 
$
24,536

 
$
25,254

Buildings
30 years
 
133,152

 
115,206

Machinery and equipment
3 to 7 years
 
236,267

 
237,179

Office equipment and other
3 to 10 years
 
101,289

 
91,666

 
 
 
495,244

 
469,305

Less accumulated depreciation
 
 
(248,150
)
 
(235,264
)
 
 
 
$
247,094

 
$
234,041


Depreciation expense for the years ended December 31, 2014, 2013 and 2012 was $34.6 million, $35.9 million and $35.3 million, respectively. Property and equipment, net, as of December 31, 2014, includes land and a building valued at approximately $2.8 million that are held for sale.