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Stock-based Compensation Plans Schedule of Share-based Compensation, Option Disclosures by Ranges of Exercise Prices (Details) (USD $) | 12 Months Ended
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Sep. 30, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Stock Options, Exercise Price Range, Number of Outstanding Options | 4,552,235
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price | $ 6.37
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term | 5 years 12 days
Stock Options, Exercisable, Number | 4,151,589
Stock Options, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ 6.56
Exercise Price Range 1 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Stock Options, Exercise Price Range, Lower Range Limit | $ 0.00
Stock Options, Exercise Price Range, Upper Range Limit | $ 4.99
Stock Options, Exercise Price Range, Number of Outstanding Options | 1,803,311
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price | $ 3.23
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term | 6 years 4 months 24 days
Stock Options, Exercisable, Number | 1,565,034
Stock Options, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ 3.37
Exercise Price Range 2 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Stock Options, Exercise Price Range, Lower Range Limit | $ 5.00
Stock Options, Exercise Price Range, Upper Range Limit | $ 9.99
Stock Options, Exercise Price Range, Number of Outstanding Options | 1,801,805
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price | $ 5.85
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term | 5 years 15 days
Stock Options, Exercisable, Number | 1,639,436
Stock Options, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ 5.70
Exercise Price Range 3 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Stock Options, Exercise Price Range, Lower Range Limit | $ 10.00
Stock Options, Exercise Price Range, Upper Range Limit | $ 14.99
Stock Options, Exercise Price Range, Number of Outstanding Options | 656,276
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price | $ 11.84
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term | 2 years 8 months 7 days
Stock Options, Exercisable, Number | 656,276
Stock Options, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ 11.84
Exercise Price Range 4 [Domain] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Stock Options, Exercise Price Range, Lower Range Limit | $ 15.00
Stock Options, Exercise Price Range, Upper Range Limit | $ 20.99
Stock Options, Exercise Price Range, Number of Outstanding Options | 290,843
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price | $ 16.71
Stock Options, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term | 1 year 9 months 27 days
Stock Options, Exercisable, Number | 290,843
Stock Options, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ 16.71

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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