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Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Current Assets:    
Cash and cash equivalents $ 100,407 $ 81,047
Marketable investments (Note 3) 142,885 136,991
Accounts receivable, net 52,249 81,378
Deferred commissions 10,274 12,010
Prepaid expenses and other current assets 30,368 25,935
Total current assets 336,183 337,361
Long-term marketable investments (Note 3) 9,581 9,565
Property and equipment, net 50,361 50,448
Goodwill 71,721 71,543
Intangible assets, net 9,808 10,317
Other assets 8,935 8,344
Total assets 486,589 487,578
Current Liabilities:    
Accounts payable 689 1,223
Accrued expenses and other current liabilities 28,260 30,153
Deferred revenue 151,708 147,887
Total current liabilities 180,657 179,263
Non-current liabilities 18,441 17,580
Total liabilities 199,098 196,843
Commitments      
Stockholders' Equity (Note 7):    
Preferred stock, $.01 par value Authorized - 500 shares, issued and outstanding - none      
Common stock, $.01 par value Authorized - 125,000 shares Issued - 31,048 and 30,962 as of March 31, 2012 and December 31, 2011, respectively Outstanding- 22,596 and 22,747 as of March 31, 2012 and December 31, 2011, respectively 310 310
Additional paid-in capital 377,077 373,591
Retained earnings 104,648 104,662
Treasury stock- 8,452 and 8,215 as of March 31, 2012 and December 31, 2011, respectively, at cost (188,700) (181,000)
Accumulated other comprehensive loss (5,844) (6,828)
Total stockholders' equity 287,491 290,735
Total liabilities and stockholders' equity $ 486,589 $ 487,578