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

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant