Balance Sheet Accounts (Narratives) (Details) (USD $)	3 Months Ended								0 Months Ended
	Sep. 30, 2013 Investment_Securities	Sep. 30, 2012	Sep. 30, 2013 Minimum	Sep. 30, 2013 Maximum	Sep. 30, 2013 Cash Equivalents Maximum	Sep. 30, 2013 Short-term Investments Minimum	Sep. 30, 2013 Short-term Investments Maximum	Sep. 30, 2013 Marketable Securities Minimum	Sep. 11, 2012 Santa Clara Headquarters acre
Balance Sheet Accounts [Line Items]
Maturity period for investments					3 months	3 months	1 year	1 year
Number of securities with unrealized losses	26
Number of investment securities	53
Other than temporary impairment loss on investments	$ 148,000
Number of acres of land sold									16
Net cash proceeds from sale of real estate	0	42,659,000							44,700,000
Gain on sale of property	$ 0	$ 11,537,000							$ 11,500,000
Maximum investment in one obligor or maker (percent)	10.00%
Extended warranty contracts period			1 year	5 years
Standard hardware warranty period	12 months
Standard software warranty period	90 days
Limited lifetime hardware warranty maximum period after end of sale of product	5 years