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Allowance for Loan Losses Allowance for Loan Losses Narrative (Details) (USD $)
 3 Months Ended 12 Months Ended 60 Months Ended
Mar. 31, 2014
loan
Mar. 31, 2013
loan
Dec. 31, 2013
loan
Dec. 31, 2012
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Allowance for Loan and Lease Losses, Related Loans, Percentage 0.40%   0.40%    
Allowance for Loan and Lease Losses, Related Loans, Period Increase (Decrease) $ 40,000        
Less allowance for loan losses 11,655,000 12,720,000 11,514,000 12,500,000 11,514,000
Percentage of Impaired Loans Requiring Adjustments in Subsequent Periods       43.00%  
Loan value, lower range 75.00%        
Construction loans accrual to company capital 25.70%        
Constructions loan portfolio maximum to company capital 100.00%        
Construction and non owner occupied commercial real estate 75.90%        
Construction And Non Owner Occupied Commercial Real Estate Loans Maximum Loan Portfolio To Company Capital 300.00%        
Outstanding loans and commitments subject by independent consulting firm 50.00%        
Residential loans typical loan to value range, high 80.00%        
Collateralized consumer loans to individuals loan to value maximum, lower range 80.00%        
Collateralized consumer loans to individuals loan to value maximum, higher range 90.00%        
Financing Receivable, Modifications, Number of Contracts 101 106 99    
Financing Receivable, Modifications, Recorded Investment 28,796,000 31,147,000 29,098,000   29,098,000
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months 13 11      
Financing Receivable Recorded Investment Greater Than30 Days Past Due 1,915,000 2,503,000      
Financing Receivable, Number Of Loans Classified As Troubled Debt Restructurings That Had Been Placed On TDR Status In Previous 12 Months 2 2      
Loans classified as TDR in last 12 months 301,000 409,000      
Financing Receivable Modifications Number Of Contracts During Period 3 7      
Financing Receivable Modifications Post Modification Recorded Investment During Period 293,000 2,948,000      
Pre-Modification Outstanding Recorded Investment 349,000 2,959,000      
Financing Receivable, Number Of Loans Classified As Troubled Debt Restructurings That Are Involved In Bankruptcy 12        
Financing Receivable, Loans Classified As Troubled Debt Restructurings That Are Involved In Bankruptcy 1,675,000        
Financing Receivable Number Of Loans Classified As Troubled Debt Restructurings That Were On Non Accrual Status 17        
Financing Receivable, Number of Loans Classified As Troubled Debt Restructurings Classified As NonAccrual 2,417,000        
Financing Receivable, Number Of Loans Classified As Troubled Debt Restructurings Involved In Foreclosure 5        
Other Real Estate, Average Percentage of Sales Price below Appraised Value 19.00%        
Other Real Estate, Additional Discount Percentage to Calculate Allowances for Losses 20.00%        
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans         1.31%
Consumer Loan [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Delinquent period before residential loans placed on non accrual status 120 days        
Residential Construction [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Less allowance for loan losses 22,000 9,000 21,000 11,000 21,000
Delinquent period before residential loans placed on non accrual status 90 days        
Financing Receivable Modifications Number Of Contracts During Period 0 0      
Unallocated Financing Receivables [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Less allowance for loan losses 1,830,000 1,089,000 1,678,000 842,000 1,678,000
Number Of Days Past Due 30 days 30 days      
Unallocated Reserves [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Less allowance for loan losses 1,830,000 1,089,000 1,678,000   1,678,000
Unallocated Reserves [Member] | Unallocated Financing Receivables [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Less allowance for loan losses 1,830,000 1,089,000 1,678,000   1,678,000
Minimum [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans         0.88%
Regulatory Capital Requirements, Estimated Required Reserve         8,700,000
Maximum [Member]
          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans         1.60%
Regulatory Capital Requirements, Estimated Required Reserve         $ 13,900,000