Business and Basis of Presentation - Additional Information (Detail)	Oct. 31, 2015 Store State
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of stores \| Store	860
Number of states in which entity operates	48

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