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Summary Of Significant Accounting Policies (Useful Lives Of Depreciable Assets) (Details)
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12 Months Ended |
|---|---|
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Oct. 31, 2011
years
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Computer And Other Equipment [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful lives of depreciable assets, minimum | 3 |
| Useful lives of depreciable assets, maximum | 5 |
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Buildings [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful lives of depreciable assets | 30 |
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Furniture And Fixtures [Member]
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|
| Property, Plant and Equipment [Line Items] | |
| Useful lives of depreciable assets | 5 |
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Leasehold Improvements (Average) [Member]
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|
| Property, Plant and Equipment [Line Items] | |
| Useful lives of depreciable assets | 5 |