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Summary of Significant Accounting Policies (Narrative) (Details) | Oct. 31, 2020
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Number of states in which entity operates | 43

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant