Loans And Allowance For Loan Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Oct. 09, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 5.0	$ 4.4
Actual loss period	3 years
Period to sell loans from the date of closing	1 month
Loans Purchased Evaluated in Conjunction With The Acquisition			$ 200.0
Loans Purchased Evaluated in Conjunction With The Acquisition, Discount			4.5
Loans, purchase credit impaired			7.8
Loans and debt securities acquired with deteriorated credit quality, discount			$ 3.3
Accrued additional interest income	$ 0.2
Interest And Fee Income Nonaccruing Loans	$ 0.1
Troubled debt restructuring default period	90 days
Troubled debt restructuring Period	12 months
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to individuals and businesses	$ 625.9
Percentage of loans to individuals and businesses	32.00%
Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal of mortgage loans serviced for others	$ 459.0	$ 460.6
Healthcare [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to individuals and businesses	$ 431.6
Percentage of loans to individuals and businesses	22.00%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days for independent appraisals on real estate collateral	30 days