Consolidated Financial Statement Details (Components of Deferred Revenue) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 234,530	$ 221,274
Less: Long-term portion	7,369	8,991
Deferred revenue, current portion	227,161	212,283
Subscriptions [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	110,582	98,225
Maintenance [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	91,297	92,823
Services [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	30,236	29,457
License fees and other [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 2,415	$ 769