Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 186,824	$ 175,647
Long-term deferred revenue	9,958	10,989
Total deferred revenue	196,782	186,636
Term license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	10,056	15,843
Perpetual license
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	25,240	23,189
Long-term deferred revenue	6,901	7,909
Maintenance
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	122,628	112,397
Long-term deferred revenue	1,744	1,802
Cloud
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	17,928	13,604
Long-term deferred revenue	1,313	1,278
Services
Deferred Revenue Arrangement [Line Items]
Current deferred revenue	$ 10,972	$ 10,614