Share-Based Payments (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Mar. 31, 2015
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	5,516
Range of Exercise Prices, Weighted Average Remaining Contractual Term	7 years 2 months 12 days
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 21.75
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	2,244
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 15.83
Range of Exercise Prices $2.00 - 19.99
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)	$ 19.99
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	1,983
Range of Exercise Prices, Weighted Average Remaining Contractual Term	5 years
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 13.55
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	1,595
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 12.17
Range of Exercise Prices $20.00 - 30.07
Information about stock options under option plans
Lower Range of Exercise Prices (in dollars per share)	$ 20.00
Upper Range of Exercise Prices (in dollars per share)	$ 30.07
Options Outstanding
Range of Exercise Prices, Number Outstanding (in shares)	3,533
Range of Exercise Prices, Weighted Average Remaining Contractual Term	8 years 6 months
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 26.36
Options Exercisable
Range of Exercise Prices, Number Exercisable (in shares)	649
Range of Exercise Prices, Weighted Average Exercise Price (in dollars per share)	$ 24.82

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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