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Loans, Troubled Debt Restructurings Segregated by Class (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Loan
Mar. 31, 2013
Loan
Dec. 31, 2013
Loan
Financing Receivable, Modifications [Line Items]      
Number of Loans 4 17 64
Term Modification $ 167 $ 8,208 $ 12,015
Rate Modification 0 0 0
Combination 0 92 3,072
Post-Modification Outstanding Balance 167 8,300 15,087
Defaulted restructured loans, number of loans 2 5  
Defaulted Restructured loans, recorded investment 34 1,002  
Commercial Construction [Member]
      
Financing Receivable, Modifications [Line Items]      
Number of Loans   3 6
Term Modification   2,110 2,603
Rate Modification   0 0
Combination   0 0
Post-Modification Outstanding Balance   2,110 2,603
Defaulted restructured loans, number of loans 0 2  
Defaulted Restructured loans, recorded investment 0 328  
Commercial Secured by Real Estate [Member]
      
Financing Receivable, Modifications [Line Items]      
Number of Loans 2 5 27
Term Modification 126 605 2,568
Rate Modification 0 0 0
Combination 0 0 2,920
Post-Modification Outstanding Balance 126 605 5,488
Defaulted restructured loans, number of loans 0 2  
Defaulted Restructured loans, recorded investment 0 662  
Commercial Other [Member]
      
Financing Receivable, Modifications [Line Items]      
Number of Loans 2 9 30
Term Modification 41 5,493 6,471
Rate Modification 0 0 0
Combination 0 92 152
Post-Modification Outstanding Balance 41 5,585 6,623
Defaulted restructured loans, number of loans 2 1  
Defaulted Restructured loans, recorded investment 34 12  
Real Estate Mortgage [Member]
      
Financing Receivable, Modifications [Line Items]      
Number of Loans     1
Term Modification     373
Rate Modification     0
Combination     0
Post-Modification Outstanding Balance     $ 373