Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation, additional disclosures
Cash proceeds from option exercises			$ 15,430,000	$ 6,581,000
Payments related to tax withholding			5,758,000	3,125,000
Stock Options
General award terms
Award vesting period			4 years
Stock-based compensation accounting
Weighted average fair value of awards granted (in dollars per share)		$ 6.47	$ 9.76	$ 6.50
Weighted average assumptions
Risk-free interest rate (as a percent)			0.60%	1.20%
Expected dividend yield (as a percent)			0.00%	0.00%
Expected life			4 years 9 months 18 days	4 years 7 months 6 days
Expected volatility factor (as a percent)			48.90%	49.70%
Stock options activity
Outstanding, beginning of period (in shares)			4,180,265
Granted (in shares)	0		498,264
Exercised (in shares)			(2,232,816)
Cancelled / Forfeited (in shares)			(59,747)
Outstanding, end of period (in shares)	2,385,966		2,385,966
Vested and exercisable (in shares)	1,363,553		1,363,553
Vested and expected to vest (in shares)	2,230,224		2,230,224
Stock options activity, additional disclosures
Weighted average exercise price, beginning of period (in dollars per share)			$ 9.03
Weighted average exercise price, granted (in dollars per share)			$ 23.40
Weighted average exercise price, exercised (in dollars per share)			$ 6.91
Weighted average exercise price, cancelled/forfeited (in dollars per share)			$ 11.91
Weighted average exercise price, end of period (in dollars per share)	$ 13.94		$ 13.94
Weighted average exercise price, vested and exercisable (in dollars per share)	$ 11.40		$ 11.40
Weighted average exercisable price, vested and expected to vest (in dollars per share)	$ 13.71		$ 13.71
Weighted average remaining contractual term, outstanding, end of period			6 years 8 months 23 days
Weighted average remaining contractual term, vested and exercisable			5 years 6 months 22 days
Weighted average remaining contractual term, vested and expected to vest			6 years 7 months 10 days
Aggregate intrinsic value, outstanding, beginning of period			59,034,000
Aggregate intrinsic value, outstanding, end of period	43,785,000		43,785,000
Aggregate intrinsic value, vested and exercisable	28,482,000		28,482,000
Aggregate intrinsic value, vested and expected to vest	41,448,000		41,448,000
Stock-based compensation, additional disclosures
Total unrecognized compensation cost	6,800,000		6,800,000
Total unrecognized compensation cost, period of recognition			2 years 7 months 6 days
Total intrinsic value of options exercised	22,600,000	4,700,000	45,800,000	9,700,000
Cash proceeds from option exercises			15,400,000	6,600,000
Stock Options | Minimum
General award terms
Stock options contractual term			7 years
Stock Options | Maximum
General award terms
Stock options contractual term			10 years
Restricted Stock Units
General award terms
Award vesting period			4 years
Restricted stock units activity
Outstanding, beginning of period (in shares)			1,327,071
Granted (in shares)	0		588,148
Settled (in shares)			(632,846)
Cancelled / Forfeited (in shares)			(51,162)
Outstanding, end of period (in shares)	1,231,211		1,231,211
Vested and expected to vest (in shares)	1,077,657		1,077,657
Restricted stock units activity, additional disclosures
Weighted average grant date fair value, beginning of period (in dollars per share)			$ 12.73
Weighted average grant date fair value, granted (in dollars per share)		$ 16.53	$ 23.40	$ 15.52
Weighted grant date fair value, settled (in dollars per share)			$ 13.96
Weighted average grant date fair value, cancelled/forfeited (in dollars per share)			$ 14.84
Weighted average grant date fair value, outstanding, end of period (in dollars per share)	$ 17.10		$ 17.10
Weighted average grant date fair value, vested and expected to vest (in dollars per share)			$ 17.07
Total fair value of shares vested from RSU grants	4,000,000	4,000,000	17,100,000	9,500,000
Stock-based compensation, additional disclosures
Total unrecognized compensation cost	18,400,000		18,400,000
Total unrecognized compensation cost, period of recognition			2 years 8 months 12 days
Payments related to tax withholding			$ 5,800,000	$ 3,100,000
Equity compensation plans
Stock-based compensation, additional disclosures
Common stock reserved for future issuance or settlement under equity compensation (in shares)	8,300,000		8,300,000