Basis Of Presentation And Accounting Policies (Narrative) (Detail)	Sep. 30, 2012 Entity
Basis Of Presentation [Line Items]
Number of branches operated	66

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

No definition available.

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