Fair Value Measurement (Schedule Of A Description Of The Valuation Technique, Unobservable Input, And Qualitative Information For The Company's Assets And Liabilities Classfied As Level 3) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Constant prepayment rate	20.59%	20.39%
Discount rate	8.60%	8.60%
Mortgage Servicing Rights [Member]
Valuation Technique	Discounted cash flow
Junior Subordinated Debentures [Member]
Valuation Technique	Discounted cash flow
Minimum [Member] | Junior Subordinated Debentures [Member]
Credit spread	5.40%
Maximum [Member] | Junior Subordinated Debentures [Member]
Credit spread	6.70%
Weighted Average [Member] | Mortgage Servicing Rights [Member]
Constant prepayment rate	20.59%
Discount rate	8.60%
Weighted Average [Member] | Junior Subordinated Debentures [Member]
Credit spread	5.70%