Stock-Based Compensation And Stockholders' Equity - Determining Fair Value (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	0.83%	1.01%	1.88%
Risk-free interest rate, maximum	1.32%	2.12%	2.28%
Dividend yield	0.00%	0.00%	0.00%
Volatility, minimum	45.62%	54.50%	51.88%
Volatility, maximum	53.72%	57.02%	55.01%
Weighted-average fair value	$ 7.15	$ 6.43	$ 5.34
Stock options granted, number of shares	2,381,700	2,172,920	1,581,230
Stock-based compensation expense before taxes	$ 10,252	$ 8,056	$ 6,457
Income tax impact	(1,582)	(1,412)	(1,052)
Stock-based compensation expense, net	8,670	6,644	5,405
Excess tax benefits accounted in additional paid-in capital	3,421	12,440	5,759
Excess tax benefit from financing activities	2,047	2,401	1,484
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	5 years 0 months 4 days	4 years 3 months 29 days	4 years 0 months 22 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	5 years 0 months 15 days	4 years 5 months 12 days	4 years 3 months 26 days
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	783	812	573
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	5,542	4,077	3,106
Sales and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	1,469	1,077	880
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before taxes	$ 2,458	$ 2,090	$ 1,898