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Property and Equipment (Notes)
12 Months Ended
Dec. 31, 2012
Property and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
Property and Equipment
The major classes of assets and total accumulated depreciation and amortization are as follows:
 
December 31,
 
2012
 
2011
Land and building
$
767

 
$
767

Leasehold improvements
55,005

 
40,147

Machinery and equipment
5,808

 
5,833

Furniture and fixtures
6,432

 
5,893

Computer equipment
30,676

 
26,191

 
98,688

 
78,831

Less accumulated depreciation and amortization
(53,403
)
 
(47,244
)
Property and equipment - net
$
45,285

 
$
31,587



Depreciation and amortization expense included in operating expenses amounted to approximately $8,501 in 2012, $6,732 in 2011 and $5,824 in 2010.