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Concentration of Credit Risk and Significant Relationships (Details) (Large Cap Value Portfolio And Related Funds [Member], USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Oct. 31, 2012
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Oct. 31, 2011
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Oct. 31, 2010
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Large Cap Value Portfolio And Related Funds [Member]
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| Major Customers [Line Items] | |||
| Major customer revenue | $ 0 | $ 127,650 | $ 126,565 |
| Percent of total revenue | 0.00% | 10.10% | 11.30% |