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)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	21.39%	20.39%	18.54%
Discount rate	8.65%	8.60%	8.62%
Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted cash flow
Junior Subordinated Debentures [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted cash flow
Weighted Average [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	21.39%
Discount rate	8.65%
Weighted Average [Member] | Junior Subordinated Debentures [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread	6.21%