Stock Option Activity - Summary of Stock Option Activity (Details Table) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, beginning	12,206,178
Number of shares, stock options granted	319,670
Number of shares, options exercised	(277,159)
Number of shares, options forfeited or cancelled	(82,850)
Number of shares, ending	12,165,839	12,206,178
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning balance, weighted average exercise price per share, options outstanding	$ 10.83
Weighted average exercise price per share, options granted	$ 11.76
Weighted average exercise price per share, options exercised	$ 5.54
Weighted average exercise price per share, options forfeited or cancelled	$ 13.76
Ending balance, weighted average exercise price per share, options outstanding	$ 10.96	$ 10.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Balance, weighted average remaining contractual term of options outstanding	6 years 1 month 23 days	6 years 2 months 24 days
Balance, aggregate intrinsic value of options outstanding	$ 42,277	$ 22,631
Number of shares options vested and expected to vest	11,913,666
Weighted average exercise price per share, options vested and expected to vest	$ 10.92
Weighted average remaining contractual term, options vested and expected to vest	6 years 1 month 1 day
Aggregate intrinsic value of options vested and expected to vest	41,806
Number of shares options vested and exercisable	8,850,611
Weighted average exercise price per share, options vested and exercisable	$ 9.93
Weighted average remaining contractual term, options vested and exercisable	5 years 2 months 17 days
Aggregate intrinsic value of options vested and exercisable	$ 37,588