Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2013 Stock Options	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options	Jun. 30, 2013 Stock Options Minimum	Jun. 30, 2013 Stock Options Maximum	Jun. 30, 2013 Restricted Stock Units	Jun. 30, 2012 Restricted Stock Units	Jun. 30, 2011 Restricted Stock Units	Jun. 30, 2013 2010 Plan	Apr. 30, 2010 2010 Plan	Jun. 30, 2013 2005 Plan	May 31, 2005 2005 Plan
Stock-based compensation, additional disclosures
Maximum number of shares authorized (in shares)												7,000,000	7,000,000	4,000,000	4,000,000
Common stock reserved for future issuance or settlement (in shares)	7,700,000											4,566,530		214,712
General award terms
Award vesting period				4 years					4 years
Contractual terms							7 years	10 years
Weighted average assumptions
Weighted average fair value (in dollars per share)				$ 9.76	$ 6.49	$ 4.99
Risk-free interest rate (as a percent)				0.60%	1.10%	1.30%
Expected life				4 years 9 months 18 days	4 years 7 months 6 days	4 years 7 months 6 days
Expected volatility factor (as a percent)				49.00%	50.00%	53.00%
Expected dividend yield (as a percent)				0.00%	0.00%	0.00%
Stock options activity
Outstanding, beginning of period (in shares)				4,180,265
Granted (in shares)				498,264
Exercised (in shares)				(2,743,772)
Cancelled / Forfeited (in shares)				(82,639)
Outstanding, end of period (in shares)				1,852,118	4,180,265
Vested and exercisable, end of period (in shares)				972,407
Vested and expected to vest, end of period (in shares)				1,563,655
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)				$ 9.03
Granted (in dollars per share)				$ 23.40
Exercised (in dollars per share)				$ 7.71
Cancelled / Forfeited (in dollars per share)				$ 12.99
Outstanding, end of period (in dollars per share)				$ 14.68	$ 9.03
Vested and exercisable, end of period (in dollars per share)				$ 12.05
Vested and expected to vest, end of period (in dollars per share)				$ 14.09
Weighted Average Remaining Contractual Term
Outstanding, end of period				6 years 9 months 18 days
Vested and exercisable, end of period				5 years 7 months 20 days
Vested and expected to vest, end of period				6 years 6 months 11 days
Aggregate Intrinsic Value
Outstanding, end of period				$ 26,140,000
Vested and exercisable, end of period				16,278,000
Vested and expected to vest, end of period				22,984,000
Restricted stock units activity
Outstanding, beginning of period (in shares)				1,327,071
Granted (in shares)				592,842
Settled (in shares)				(815,440)
Cancelled / Forfeited (in shares)				(73,634)
Outstanding, end of period (in shares)				1,030,839	1,327,071
Vested and expected to vest (in shares)				751,521
Weighted Average Grant Date Fair Value
Outstanding, beginning of period (in dollars per share)				$ 12.73
Granted (in dollars per share)				$ 23.46	$ 15.52	$ 11.02
Settled (RSUs) (in dollars per share)				$ 13.99
Cancelled / Forfeited (in dollars per share)				$ 15.59
Outstanding, end of period (in dollars per share)				$ 17.69	$ 12.73
Vested and expected to vest, end of period (in dollars per share)				$ 17.39
Total fair value of shares vested from RSU grants									22,500,000	14,000,000	11,700,000
Total unrecognized compensation cost				4,900,000					13,400,000
Total unrecognized compensation cost, period of recognition				2 years 3 months 18 days					2 years 4 months 24 days
Total intrinsic value of options exercised				55,700,000	14,600,000	12,200,000
Cash proceeds from option exercises				21,100,000	8,900,000	9,700,000
Payments related to tax withholding	$ 7,705,000	$ 4,597,000	$ 3,885,000						$ 7,700,000	$ 4,600,000	$ 3,900,000
Stock grant (in shares)				333,214					392,440