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Balance Sheet Details - Changes in Deferred Services Revenue (Details) (Software Service, Support and Maintenance Arrangement, USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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Software Service, Support and Maintenance Arrangement
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| Deferred Revenue Arrangement [Line Items] | ||
| Balance at beginning of period | $ 257,280 | $ 253,793 |
| Additions to deferred service revenue | 87,848 | 85,894 |
| Amortization of deferred service revenue | (86,186) | (86,643) |
| Balance at end of period | $ 258,942 | $ 253,044 |