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Deferred Revenue and Advance Payments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]    
Deferred product licenses revenue, Current $ 12,525 $ 10,927
Deferred subscription services revenue, Current 12,362 16,018
Deferred product support revenue, Current 146,194 168,833
Deferred other services revenue, Current 6,737 10,564
Gross current deferred revenue and advance payments 177,818 206,342
Less: unpaid deferred revenue (58,045) (97,929)
Net current deferred revenue and advance payments 119,773 108,413
Deferred product licenses revenue, Non-current 6,714 8,012
Deferred subscription services revenue, Non-current 463 750
Deferred product support revenue, Non-current 8,147 7,505
Deferred other services revenue, Non-current 1,537 1,047
Gross non-current deferred revenue and advance payments 16,861 17,314
Less: unpaid deferred revenue (6,552) (6,496)
Net non-current deferred revenue and advance payments $ 10,309 $ 10,818