Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Details)

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Property and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Property and equipment, cost:      
Property and equipment, gross $ 66,238   $ 66,061
Less accumulated depreciation and amortization (39,116)   (37,380)
Property and equipment, net 27,122   28,681
Cost written off 1,623    
Depreciation and amortization expense $ 3,359 $ 1,600  
Computer equipment and software      
Property and equipment, cost:      
Estimated Useful Life 3 years    
Property and equipment, gross $ 44,177   44,470
Office furniture and fixtures      
Property and equipment, cost:      
Estimated Useful Life 7 years    
Property and equipment, gross $ 5,795   5,785
Leasehold improvements      
Property and equipment, cost:      
Property and equipment, gross $ 15,523   15,123
Other office equipment      
Property and equipment, cost:      
Estimated Useful Life 5 years    
Property and equipment, gross $ 743   $ 683