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Deferred Revenue and Advance Payments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]    
Deferred product licenses revenue, Current $ 13,506 $ 10,927
Deferred subscription services revenue, Current 15,763 16,018
Deferred product support revenue, Current 158,738 168,833
Deferred other services revenue, Current 9,149 10,564
Gross current deferred revenue and advance payments 197,156 206,342
Less: unpaid deferred revenue (96,461) (97,929)
Net current deferred revenue and advance payments 100,695 108,413
Deferred product licenses revenue, Non-current 5,397 8,012
Deferred subscription services revenue, Non-current 2,138 750
Deferred product support revenue, Non-current 7,607 7,505
Deferred other services revenue, Non-current 795 1,047
Gross non-current deferred revenue and advance payments 15,937 17,314
Less: unpaid deferred revenue (6,942) (6,496)
Net non-current deferred revenue and advance payments $ 8,995 $ 10,818