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PROPERTY AND EQUIPMENT
12 Months Ended
Dec. 31, 2011
PROPERTY AND EQUIPMENT DISCLOSURE [Abstract]  
PROPERTY AND EQUIPMENT
Property and Equipment
Property and equipment consisted of the following (in thousands):
 
 
As of December 31,
 
 
2011
 
2010
Computer equipment and purchased software
 
$
44,673

 
$
34,582

Furniture and equipment
 
4,924

 
4,464

Leasehold improvements
 
3,400

 
2,415

 
 
52,997

 
41,461

Less: accumulated depreciation and amortization
 
(33,045
)
 
(29,047
)
 
 
$
19,952

 
$
12,414


Total depreciation expense, including the amortization of leasehold improvements, for the years ended December 31, 2011, 2010 and 2009 was $8.0 million, $6.6 million and $7.6 million, respectively.