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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Assets    
Cash and cash equivalents $ 37,443 $ 37,328
Accounts receivable, net 30,635 20,214
Prepaid expenses and other current assets 3,614 3,567
Refundable taxes 193 3,249
Deferred tax assets 2,753 869
Total current assets 74,638 65,227
Property and equipment, net 6,187 4,710
Deferred tax assets 46,310 50,769
Intangible and other assets, net 2,191 2,070
Goodwill 82,644 35,337
Intangible assets from acquisitions, net 8,088 1,577
Total assets 220,058 159,690
Liabilities and Stockholders' Equity    
Accounts payable 12,896 11,166
Accrued expenses and other current liabilities 8,430 5,106
Deferred acquisition payments 35,214  
Deferred revenue 1,930 1,650
Total current liabilities 58,470 17,922
Other non-current liabilities 2,580 2,076
Total liabilities 61,050 19,998
Commitments and contingencies      
Stockholders' equity:    
Treasury stock: 223 and 157 shares of Class B stock at December 31, 2010 and 2011, respectively (1,067) (1,360)
Additional paid-in capital 297,465 281,421
Accumulated deficit (137,770) (140,729)
Total stockholders' equity 159,008 139,692
Total liabilities and stockholders' equity 220,058 159,690
Class A Common Stock [Member]
    
Stockholders' equity:    
Common stock 99 105
Class B Common Stock [Member]
    
Stockholders' equity:    
Common stock $ 281 $ 255