Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 175,647	$ 155,873
Long-term deferred revenue	10,989	15,805
Total deferred revenue	186,636	171,678
Term license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	15,843	19,792
Perpetual license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	23,189	21,094
Long-term deferred revenue	7,909	12,389
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	112,397	95,262
Long-term deferred revenue	1,802	2,227
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	13,604	8,948
Long-term deferred revenue	1,278	1,189
Services
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 10,614	$ 10,777