Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 158,181	$ 155,873
Long-term deferred revenue	13,458	15,805
Total deferred revenue	171,639	171,678
Software license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	35,457	40,886
Long-term deferred revenue	9,898	12,389
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	102,780	95,262
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	10,940	8,948
Long-term deferred revenue	1,495	1,189
Services
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	9,004	10,777
Maintenance and services
Deferred Revenue Arrangement [Line Items]
Long-term deferred revenue	$ 2,065	$ 2,227