Share-Based Payments (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	8,983
Range of Exercise Prices, Weighted Average Remaining Contractual Term	6 years 2 months 12 days
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 15.93
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	5,235
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 12.10
Range of Exercise Prices $2.00 - 9.66
Information about stock options under option plans
Lower Range of Exercise Prices (in dollars per share)	$ 2.00
Upper Range of Exercise Prices (in dollars per share)	$ 9.66
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	2,851
Range of Exercise Prices, Weighted Average Remaining Contractual Term	3 years 7 months 6 days
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 7.66
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	2,851
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 7.66
Range of Exercise Prices $11.39 - 26.30
Information about stock options under option plans
Lower Range of Exercise Prices (in dollars per share)	$ 11.39
Upper Range of Exercise Prices (in dollars per share)	$ 26.30
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	6,132
Range of Exercise Prices, Weighted Average Remaining Contractual Term	7 years 3 months 18 days
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 19.78
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	2,384
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 17.41