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Impairment Charges (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2012 | Sep. 30, 2009
Licenses [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
License costs |  | $ 0.5
Impairment of intangible asset | 0.4 |
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Impairment of intangible asset | $ 0.3 |

X
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance with a finite life acquired. + References No definition available. + Details
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X
- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 46 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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