Summary of Significant Accounting Policies (Details 5) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Nov. 30, 2010 2006 Plan Stock options	Jun. 30, 2012 2006 Plan Stock options item	Jun. 30, 2011 2006 Plan Stock options	Jun. 30, 2010 2006 Plan Stock options	Nov. 30, 2010 2006 Plan Stock options Maximum	Jun. 30, 2012 2006 Plan Stock options Maximum	Nov. 16, 2010 2006 Plan Stock options Maximum
Stock-based Compensation
Number of employee share-based compensation plans					1
Increase in number of shares of common stock authorized for issuance				4,000,000
Common stock authorized for issuance (in shares)										8,500,000
Number of shares of common stock added to the Plan from the Former Plan								5,900,000
Vesting period									4 years
Exercise period									10 years
Weighted-average assumptions used to estimate the fair value of each stock option
Expected dividend yield assumption (as a percent)					0.00%
Number of group of awards for which expected term is calculated for and applied					1
Volatility (as a percent)					59.70%	58.81%	59.90%
Risk-free interest rate (as a percent)					2.16%	2.43%	3.19%
Expected life					7 years 1 month 6 days	7 years 2 months 12 days	7 years
Weighted-average grant date fair values of options granted (in dollars per share)					$ 9.00	$ 5.51	$ 5.83
Stock compensation expense					$ 9,900,000	$ 5,500,000	$ 4,200,000
Number of Stock Options
Outstanding at the beginning of the period (in shares)	6,491,000	6,065,000			6,491,000
Granted (in shares)					1,657,000
Exercised (in shares)					(1,432,000)
Forfeited/Canceled (in shares)					(274,000)
Outstanding at the end of the period (in shares)	6,442,000	6,491,000	6,065,000		6,442,000	6,491,000
Vested or unvested and expected to vest at the end of the period (in shares)					6,135,000
Exercisable at the end of the period (in shares)					3,416,000	3,834,000	4,011,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)					$ 6.70
Granted (in dollars per share)					$ 14.89
Exercised (in dollars per share)					$ 4.88
Forfeited/Canceled (in dollars per share)					$ 12.16
Outstanding at the end of the period (in dollars per share)					$ 8.98	$ 6.70
Vested or unvested and expected to vest at the end of the period (in dollars per share)					$ 9.21
Exercisable at the end of the period (in dollars per share)					$ 6.34	$ 5.25	$ 6.88
Weighted-Average Remaining Life (in years)
Outstanding at the end of the period					6 years 10 months 13 days
Vested or unvested and expected to vest at the end of the period					6 years 9 months 14 days
Exercisable at the end of the period					5 years 5 months 23 days
Aggregate Intrinsic Value
Outstanding at the end of the period					50,001,000
Vested or unvested and expected to vest at the end of the period					48,662,000
Exercisable at the end of the period					35,525,000
Additional disclosure for options
Estimated fair value of unvested employee awards, net of estimated forfeitures					11,400,000
Weighted average vesting period of unvested employee awards					2 years
Summary of option activity for shares vested
Total fair value of shares vested					5,647,000	3,427,000	2,410,000
Total intrinsic value of options exercised					12,476,000	3,467,000	1,888,000
Cash received for exercise of stock options	$ 6,988,000	$ 2,719,000	$ 3,462,000		$ 6,988,000	$ 2,719,000	$ 3,462,000