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

4.        Equipment and Leasehold Improvements

               The carrying value of equipment and leasehold improvements by classification was as follows for the periods indicated.

 

 As of December 31,
 2012 2011
Software$ 16,784 $ 13,653
Computer equipment  4,879   4,576
Leasehold improvements  2,524   2,524
Other equipment  2,390   2,247
Furniture and fixtures  963   959
Automobiles  10   10
Total cost  27,550   23,969
Less accumulated depreciation and amortization  18,455   14,005
Equipment and leasehold improvements, net$ 9,095 $ 9,964

       Depreciation and amortization expense for the years ended December 31, 2012, 2011, and 2010 was $4,450, $3,277, and $2,526, respectively.