Document and Entity Information [Abstract] Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. Neither stock has a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Federal Reserve And Fhlb Stock At Cost Federal Reserve and FHLB stock at cost Interchange income earned from credit cards, ATM and debit card transactions, net of cash back rewards expense on credit cards. Interchange Income Interchange income Proceeds from sales of other real estate and repossessions Proceeds received from sale of other real estate owned due to foreclosures and proceeds from sale of repossessed property. Proceeds from sales of other real estate and repossessions Commitments And Contingencies [Abstract] Fair Value [Abstract] Expense reconized on classified loans (appraisals, title insurance). The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write downs of other real estate owned after acquistion or physical possession. Non performing assets Value of property moved into other real estate owned due to foreclosures of property. Loan balances transferred to foreclosed real estate Loans And Allowance For Loan Losses [Text Block] Loans And Allowance For Loan Losses Includes loan, allowance for loan loss, impaired loans and troubled debt restructure disclosures. Loans And Allowance For Loan Losses [Abstract] Mortgage Servicing [Text Block] Mortgage Servicing Mortgage bank activity related to mortgage servicing activity and escrow balances. Mortgage Servicing [Abstract] Loans And Allowance For Losses [Table Text Block] Loans and allowance for loan losses tables. Allowance for Credit Losses on Financing Receivables Individually and Collectively Evaluated for Impairment [Table Text Block] Allowance for credit losses on financing receivables individually and collectively evaluated for impairment. Other Real Estate And Foreclosed Assets [Table Text Block] Table showing detail of other real estate or personal property aquired through forclosure. Other Real Estate And Foreclosed Assets Expense [Table Text Block] Tabular disclosure of other real estate properties and foreclosed assets. Held to Maturity [Abstract] Other Securities [Member] Other securities not listed in taxonomy. Sales Of Held To Maturity Securities Transactions Number of Held to Maturity securities sold. Held To Maturity Securities Amortized Cost [Abstract] Schedule Of Investments In Continuous Unrealized Loss Position [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Construction loans Reflects the gross carrying amount of unpaid loans that had been issued to businesses and individuals . A construction loan is generally expected to be paid off with the net proceeds from permanent financing. Loans Receivable Construction Investment Securities Continous Unrealized Loss [Table] Investment Securities that have been in a continous unrealized loss possition for less than 12 months or greater than 12 months Loans Pledged [Table] This table lists the loans pledged.The line items identify information about the loans pledged. Loans Pledged Category [Axis] Information pertaining to loans pledged categorized by type. Loans Pledged Category [Domain] Information pertaining to loans pledged categorized by type this domain represents the collection of all members of the axis. Schedule Of Loans Pledged [Axis] Information pertaining to loans pledged categorized by institution. Schedule Of Loans Pledged [Domain] Information pertaining to loans pledged categorized by type this domain represents the collection of all members of the axis. Federal Home Loan Bank Loans Pledged [Member] Federal Home Loan Bank loans pledged as collateral. Federal Reserve Bank Pledged [Member] Federal Reserve Bank loans pledged as collateral. This element represents the number of investments with amortized cost greater than fair value. Corporation Held Number Of Investments In Amortized Cost Interactive Data Corporation BBB Plus Rating [Member] BBB+ credit rating as defined by the external credit rating agency, Interactive Data Corporation. Allowance For Loan Losses Impairment Method [Abstract] Allowance for loan losses: Allowance as a % of loans Loans And Leases Receivable Ratio Of Loans And Leases Receivable Allowance Reflects the percentage derived from dividing allowance for loans and leases receivable by total loans. Loans: Loans Impairment Method [Abstract] Commercial And Industrial Receivable [Member] Class of financing receivables related to commerical and industrial receivables. Residential Mortgage Receivable [Member] Class of financing receivables related to residential mortgage receivables. 1-4 family Consumer Installment Receivable [Member] Class of financing receivables related to consumer installment receivables. Installment Impaired Financing Average Allowance [Axis] Impaired financing average allowance axis. Impaired Financing Average Allowance [Domain] Impaired financing average allowance domain. Residential Home Equity Receivable [Member] Class of financing receivables related to residential home equity receivables. Home equity Consumer Personal Receivable [Member] Class of financing receivables related to consumer personal receivables. Personal Financing Receivable Modifications Specific Reserve The amount of specifc reserve related to financing receivables that have been modified. Financing Receivable Modifications Non Accrual The amount of non accrual loans related to financing receivables that have been modified. Financing Receivable Modifications Non Accrual Specific Reserve The amount of specifc reserve related non accrual financing receivables that have been modified Financing Receivable Modifications Loan Commitments The amount committed to lend to customers who have financing receivables that have been modifed. Not Rated [Member] Not rated loans are home equity, installment, residential mortgages, credit cards and demand deposit credit lines which are in a pool that are treated as pass loans. Loans And Leases Receivable Residential Net Of Deferred Income Reflects the net carrying amount of residential loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on residential loans and leases. Schedule Of Financing Receivable Recorded Investment Consumer And Residential [Table] Schedule of financing receivables recorded investments consumer and residential by type. Performing And Non Performing Loans [Axis] Performing and non performing loans axis. Performing And Non Performing Loans [Domain] Performing and non performing loans domain. Performing Loans [Member] A financing receivables that are current with payments made on the loan receivables. Non Performing Loans [Member] A financing receivables that are not current with payments made on the loan receivables. Financing Receivable Collectively Evaluated For Impairment 1 Collectively evaluated for impairment The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. Changes In Securities Available For Sale [Abstract] Change in securities available for sale: Total Held to Maturity Aggregate by Investment [Member] Held to Maturity securities aggregated by investment total. Total Available for Sale Agrregate by Investment [Member] Available for Sale securities aggregated by investment total. Past Due Loans And Leases Receivable Ratio Of Loans And Leases Receivable Reflects the percentage derived from dividing past due loans and leases receivable by total loans. Financing Receivable Modifications Extention Of Maturity Date Range The date range financing receivable modifications maturity extention. Financing Receivable Modifications Resulting In Charge Off The amount of charge offs relating to financing receivable modifications. Financing Receivable Troubled Debt Restructurings That Subsequently Defaulted Days Defined The number of days past due under the modified terms a loan is considered to be in payment default. Financing Receivable Troubled Debt Restructurings That Subsequently Defaulted Increase To Allowance For Loan Losses The amount of increase in allowance for loan losses resulting from subsequent default of a modified loan. Financing Receivable Troubled Debt Restructurings That Subsequently Defaulted Charge Off The amount of charge offs resulting from subsequent default of a modified loan. Financing Receivable Modifications Not Considered Troubled Debt Restructuring Recorded Investment The recorded investment amount in loans that were modified but not considered troubled debt restructure. Financing Receivable Recorded Investment By Class Of Financing Receivable Related And No Related [Axis] Recorded investment in financing receivables by class of financing receivables allowance recorded. Financing Receivable Recorded Investment By Class Of Financing Receivable Related And No Related [Domain] Financing Receivable Recorded Investment By Class Of Financing Receivable Related [Member] Financing Receivable Recorded Investment By Class Of Financing Receivable Related Financing Receivable Recorded Investment By Class Of Financing Receivable No Related [Member] Financing Receivable Recorded Investment By Class Of Financing Receivable No Related Financing Receivable Total Financing receivable total. Financing Receivable Recorded Investment Days Past Due [Axis] Recorded investment in financing receivables by days past due of financing receivables. Financing Receivable Recorded Investment Days Past Due [Domain] Listing of the financing receivables days past due. Financing Receivable Recorded Investment 30 To 89 Days Past Due [Member] Financing receivable recorded investment 30 to 89 days past due. Financing Receivable Recorded Investment Equal To Greater Than 90 Days Past Due [Member] Financing receivable recorded investment equal to greater than 90 days past due. Commercial Loans Commercial Real Estate And Construction Loans [Member] Loans pledged as collateral at the Federal Reserve Bank Discount Window. Sales Of Available for Sale Securities Transactions Number of Available for Sale securities sold. Available For Sale Securities Sold Security, at Carrying Value Carrying value of Available for Sale securities sold. Available For Sale Securities Sold Security Realized Gain (Loss), Excluding Other Than Temporary Impairments This item represents the gain (loss) realized on the sale of available for sale securities disposed of during the period. Net Gain Or Loss On Sales And Writedowns Of Other Real Estate And Repossessions Net (gain) loss on sales and writedowns of other real estate and repossessions The net gain or loss on sale of foreclosed property or repossessions. In addition the net writedown or write up of the foreclosed property or repossessions. Other Temporary Impairements Amount This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt securities. Available For Sale Percentage Of Portofolio With Unrealized Loss Maximum Available for sales securities maximum percentage at a loss respective to amortized costs. Held To Maturity Percentage Of Portofolio With Unrealized Loss Maximum Held to Maturity securities maximum percentage at a loss respective to amortized costs. Municipal Debt Securities Amount Represents the amount of municipal securities. Financing Receivable Recorded Investment 90 Days Past Due And Still Accruing Number Of Days Financing receivable recorded investment 90 days past due and still accruing interest. Loans And Leases Receivable Nonperforming Criteria Days Number of days for placing loans and receivables on nonaccrual status: past due 90 days or greater, non accruing status, or troubled debt restructurings. Financing Receivable Modifications Deduction Of Stated Interest Rate Date Range The date range the financing receivable modifications deduction of stated interest rate. Financing Receivable Modifications Number Of Contracts [Axis] Financing receivable modifications number of contracts. Financing Receivable Modifications Number Of Contracts [Domain] Financing receivable modifications number of contracts. Financing Receivable Modifications Number Of Contracts Oustanding Three Month Period [Member] Financing receivable modifications number of contracts outstanding three month period. Financing Receivable Modifications Number Of Contracts Oustanding Nine Month Period [Member] Financing receivable modifications number of contracts outstanding nine month period. Financing Receivable Modifications Number Of Contracts 1 Financing Receivable, Modifications, Number of Contracts Financing Receivable modifications number of contracts. Financing Receivable Modifications Premodification Outstanding Recorded Investment The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings before the financing receivable has been modified. Financing Receivable Modifications Postmodification Outstanding Recorded Investment The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings after the financing receivable has been modified. Loans Leases Receivable Impaired Interest Lost On Nonaccrual Accrued interest receivable Accrued interest receivable on loans. Impaired Recorded Investment In Financing Receivables Evaluated Individually And Collectively Total recorded investment Total recorded investment in impaired loans individually and collectively evaluated for impairment.