Summary Of Significant Accounting Policies (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2012 M D
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of grace period days to become non-accrual loans	90
Term past due loans places on non-accrual status, days	90
Number of grace period days to charge-off loans	180
Minimum period troubled debt restructurings placed on non-accrual status, months	6
Minimum demonstrated performance period troubled debt restructurings returned to accrual status, months	6