Basis of Presentation, Business and Summary of Significant Accounting Policies - Business (Details)	Jul. 31, 2016 location state
Business
Number of states in which national footprint is created \| state	41
Minimum
Business
Number of branches in which national footprint is created \| location	185

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