Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 134,075	$ 134,672
Long-term deferred revenue	13,857	20,859
Total deferred revenue	147,932	155,531
Software license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	33,495	38,961
Long-term deferred revenue	13,724	19,878
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	80,830	83,467
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	8,151	4,209
Services and other
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	11,599	8,035
Maintenance and services
Deferred Revenue Arrangement [Line Items]
Long-term deferred revenue	$ 133	$ 981