Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Current assets    
Cash and cash equivalents $ 616,508 $ 252,674
Accounts receivable, net 50,513 61,158
Prepaid expenses and other current assets 7,118 7,180
Income taxes receivable 2,069 2,033
Deferred income taxes 8,860 9,136
Total current assets 685,068 332,181
Property and equipment, net 22,667 21,338
Deferred income taxes 813 589
Deposits and other noncurrent assets 812 819
Total assets 709,360 354,927
Current liabilities    
Accounts payable 4,056 2,178
Accrued liabilities and other current liabilities 10,081 8,456
Accrued compensation and employee related benefits 19,253 27,187
Income taxes payable 109 178
Deferred revenue in current liabilities 69,910 66,290
Total current liabilities 103,409 104,289
Deferred revenue 3,622 3,264
Other long-term liabilities 2,478 2,714
Total liabilities 109,509 110,267
Commitments and contingencies (Note 6)      
Convertible preferred stock    
Convertible Preferred Stock 0 0
Stockholders’ equity (deficit)    
Additional paid-in capital 600,211 239,406
Accumulated other comprehensive loss (56) (71)
Retained earnings (accumulated deficit) (311) 5,318
Total stockholders’ equity 599,851 244,660
Total liabilities and stockholders’ equity 709,360 354,927
Common Class B [Member]
    
Stockholders’ equity (deficit)    
Common Stock 3 4
Common Class A [Member]
    
Stockholders’ equity (deficit)    
Common Stock $ 4 $ 3