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Deferred Revenue and Advance Payments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]    
Deferred product licenses revenue, Current $ 13,155 $ 10,927
Deferred subscription services revenue, Current 11,172 16,018
Deferred product support revenue, Current 135,999 168,833
Deferred other services revenue, Current 6,794 10,564
Gross current deferred revenue and advance payments 167,120 206,342
Less: unpaid deferred revenue (51,616) (97,929)
Net current deferred revenue and advance payments 115,504 108,413
Deferred product licenses revenue, Non-current 6,344 8,012
Deferred subscription services revenue, Non-current 808 750
Deferred product support revenue, Non-current 6,962 7,505
Deferred other services revenue, Non-current 1,166 1,047
Gross non-current deferred revenue and advance payments 15,280 17,314
Less: unpaid deferred revenue (4,983) (6,496)
Net non-current deferred revenue and advance payments $ 10,297 $ 10,818