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Deferred Revenue and Advance Payments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]    
Deferred product licenses revenue, Current $ 13,088 $ 13,506
Deferred subscription services revenue, Current 17,593 15,763
Deferred product support revenue, Current 164,667 158,738
Deferred other services revenue, Current 7,411 9,149
Gross current deferred revenue and advance payments 202,759 197,156
Less: unpaid deferred revenue, Current (71,322) (96,461)
Net current deferred revenue and advance payments 131,437 100,695
Deferred product licenses revenue, Non-current 7,573 5,397
Deferred subscription services revenue, Non-current 2,340 2,138
Deferred product support revenue, Non-current 6,425 7,607
Deferred other services revenue, Non-current 755 795
Gross non-current deferred revenue and advance payments 17,093 15,937
Less: unpaid deferred revenue, Non-current (6,910) (6,942)
Net non-current deferred revenue and advance payments $ 10,183 $ 8,995