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Basis of Presentation and Summary of Significant Accounting Policies (Narratives) (Details) (USD $) | 0 Months Ended | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  | 0 Months Ended |
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Sep. 12, 2012 building | Jun. 30, 2013 Distribution_Channels building Investment_Securities | Jun. 30, 2012 | Jul. 03, 2011 | Jun. 30, 2013 Allowance for Sales Returns | Jun. 30, 2012 Allowance for Sales Returns | Jul. 03, 2011 Allowance for Sales Returns | Jun. 27, 2010 Allowance for Sales Returns | Jun. 30, 2013 Buildings | Jun. 30, 2013 Minimum | Jun. 30, 2013 Minimum Computer Equipment | Jun. 30, 2013 Minimum Software | Jun. 30, 2013 Minimum Office Equipment | Jun. 30, 2013 Minimum Furniture and Fixtures | Jun. 30, 2013 Minimum Leasehold Improvements | Jun. 30, 2013 Maximum | Jun. 30, 2013 Maximum Computer Equipment | Jun. 30, 2013 Maximum Software | Jun. 30, 2013 Maximum Office Equipment | Jun. 30, 2013 Maximum Furniture and Fixtures | Jun. 30, 2013 Maximum Leasehold Improvements | Jun. 30, 2013 Product | Jun. 30, 2012 Product | Jun. 30, 2013 Services | Jun. 30, 2012 Services | Jun. 30, 2013 Available-for-sale Securities Government and Corporate Debt Securities | Jun. 30, 2013 Marketable Securities Minimum | Jan. 31, 2012 Santa Clara Corporate Headquarters, First Property | Sep. 23, 2010 Santa Clara Corporate Headquarters, First Property | Sep. 11, 2012 Santa Clara Headquarters | Sep. 12, 2012 Lease Expiring January 31, 2013 building | Sep. 12, 2012 Lease Expiring August 31, 2014 building
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Duration of fiscal periods (in days) |  | 364 days | 364 days | 371 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue from customers other than distributors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,119,000 | $ 2,236,000 |  |  |  |  |  |  |  |  |
Deferred product revenue from customers other than distributors |  | 41,454,000 | 39,328,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,658,000 | 37,708,000 |  |  |  |  |  |  |
Number of distribution channels or tiers |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance |  |  |  |  | 777,000 | 1,262,000 | 645,000 | 937,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity period for investments (in months and years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 1 year |  |  |  |  |
Number of securities with unrealized losses (in securities) |  | 34 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of investment securities (in securities) |  | 60 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum investment in one obligor or maker (percent) |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option price for sale of campus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,000,000 |  |  |
Assets held for sale |  | 0 | 17,081,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,100,000 |  |  |  |
Proceeds from sale of former headquarter campus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,700,000 |  |
Number of campus buildings leased after sold | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 2
Number of campus buildings sold | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of days notice required to terminate lease | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of buildings where lease was terminated |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of property and equipment |  |  |  |  |  |  |  |  | 25 years |  | 3 years | 3 years | 5 years | 5 years | 2 years |  | 4 years | 4 years | 7 years | 7 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Amortization expense |  | 1,500,000 | 1,800,000 | 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service inventory held to support customers |  | 6,300,000 | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extended warranty contracts period (in years) |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Standard hardware warranty period (in months) |  | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Standard software warranty period (in days) |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited lifetime hardware warranty maximum period after end of sale of product (in years) |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising expenses |  | $ 200,000 | $ 500,000 | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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