Goodwill and Purchased Intangible Assets (Purchased Intangible Assets) (Details) (USD $)	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Jun. 30, 2011
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2012 (remaining 9 months)	$ 22,276,000
2013	20,957,000
2014	15,537,000
2015	12,771,000
2016	5,582,000
2017 and thereafter	826,000
Total	77,949,000
Components of purchased intangible assets
Gross Carrying Amount	283,125,000		283,125,000
Accumulated Amortization and Impairment	205,176,000		197,223,000
Net Amount	77,949,000		85,902,000
Other intangible assets, amortization expense	8,000,000	8,400,000
Existing technology
Components of purchased intangible assets
Gross Carrying Amount	134,561,000		134,561,000
Accumulated Amortization and Impairment	98,603,000		94,172,000
Net Amount	35,958,000		40,389,000
Range of Useful Lives, Minimum (in years)	4
Range of Useful Lives, Maximum (in years)	7
Customer relationships
Components of purchased intangible assets
Gross Carrying Amount	54,823,000		54,823,000
Accumulated Amortization and Impairment	35,056,000		33,565,000
Net Amount	19,767,000		21,258,000
Range of Useful Lives, Minimum (in years)	6
Range of Useful Lives, Maximum (in years)	7
Patents
Components of purchased intangible assets
Gross Carrying Amount	57,648,000		57,648,000
Accumulated Amortization and Impairment	42,185,000		40,591,000
Net Amount	15,463,000		17,057,000
Range of Useful Lives, Minimum (in years)	6
Range of Useful Lives, Maximum (in years)	13
Trade name/Trademark
Components of purchased intangible assets
Gross Carrying Amount	19,893,000		19,893,000
Accumulated Amortization and Impairment	13,303,000		12,907,000
Net Amount	6,590,000		6,986,000
Range of Useful Lives, Minimum (in years)	4
Range of Useful Lives, Maximum (in years)	10
Other
Components of purchased intangible assets
Gross Carrying Amount	16,200,000		16,200,000
Accumulated Amortization and Impairment	16,029,000		15,988,000
Net Amount	$ 171,000		$ 212,000
Range of Useful Lives, Minimum (in years)	0
Range of Useful Lives, Maximum (in years)	1