Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 140,458	$ 155,873
Long-term deferred revenue	10,228	15,805
Total deferred revenue	150,686	171,678
Software license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	28,630	40,886
Long-term deferred revenue	6,929	12,389
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	95,378	95,262
Long-term deferred revenue	1,701	2,227
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	10,123	8,948
Long-term deferred revenue	1,598	1,189
Services
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 6,327	$ 10,777