Summary Of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2011 days
Number of days before loans are placed on non-accrual status	60
Estimated useful lives or term of the lease, minimum, years	3
Estimated useful lives or term of the lease, maximum, years	40
Other Intangible Assets [Member]
Finite-lived intangible assets, useful life, minimum, years	5
Finite-lived intangible assets, useful life, maximum, years	20
Core Deposits Intangibles [Member]
Finite-lived intangible assets, useful life, minimum, years	16
Finite-lived intangible assets, useful life, maximum, years	22