v2.4.0.6
Summary of Effects of New Guidance on Consolidated Balance Sheets and Statements of Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total deferred revenue         $ 74,646    
Revenues:              
Subscription 64,886 33,191 141,640 76,331 79,191 40,078 17,841
Professional services and other 8,489 4,753 26,910 12,563 13,450 3,251 1,474
Total revenues 73,375 37,944 168,550 88,894 92,641 43,329 19,315
Under Previous Accounting Guidance
              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total deferred revenue         81,036    
Revenues:              
Subscription         78,305    
Professional services and other         7,946    
Total revenues         86,251    
Impact of Adoption of ASU 2009-13
              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total deferred revenue         (6,390)    
Revenues:              
Subscription         886    
Professional services and other         5,504    
Total revenues         $ 6,390