Schedule of Deferred Revenue (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 134,672	$ 110,690
Long-term deferred revenue	20,859	34,196
Total deferred revenue	155,531	144,886
Software license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	38,961	28,826
Long-term deferred revenue	19,878	32,727
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	83,467	72,715
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	4,209	2,360
Long-term deferred revenue		354
Services and other
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	8,035	6,789
Maintenance and services
Deferred Revenue Arrangement [Line Items]
Long-term deferred revenue	$ 981	$ 1,115