Nature of Business - Additional Information (Detail)	Oct. 31, 2015 State Store
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of stores leased and operated	611
Number of states \| State	50

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