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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 308,887 $ 292,341
Restricted cash 701 618
Short-term investments 227,410 193,320
Accounts receivable, net 56,558 68,154
Prepaid expenses and other current assets 14,563 10,881
Total current assets 608,119 565,314
Property and equipment, net 63,228 65,664
Capitalized software development costs, net 13,902 15,855
Deposits and other assets 2,103 2,072
Deferred tax assets, net 5,826 7,989
Total assets 693,178 656,894
Current liabilities:    
Accounts payable and accrued expenses 27,836 31,840
Accrued compensation and employee benefits 36,573 40,067
Accrued restructuring costs 33 56
Deferred revenue and advance payments 131,437 100,695
Total current liabilities 195,879 172,658
Deferred revenue and advance payments 10,183 8,995
Other long-term liabilities 19,252 19,943
Deferred tax liabilities 16 17
Total liabilities $ 225,330 $ 201,613
Commitments and Contingencies
Stockholders' Equity    
Preferred stock undesignated, $0.001 par value; 5,000 shares authorized; no shares issued or outstanding $ 0 $ 0
Additional paid-in capital 532,284 534,651
Treasury stock, at cost; 6,405 shares (475,184) (475,184)
Accumulated other comprehensive loss (6,746) (7,408)
Retained earnings 417,476 403,204
Total stockholders' equity 467,848 455,281
Total liabilities and stockholders' equity 693,178 656,894
Class A    
Stockholders' Equity    
Common stock 16 16
Class B Convertible    
Stockholders' Equity    
Common stock $ 2 $ 2