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Commitments and Contingencies (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Commitments to extend credit
Dec. 31, 2013
Commitments to extend credit
Mar. 31, 2014
Undisbursed lines of credit
Dec. 31, 2013
Undisbursed lines of credit
Mar. 31, 2014
Undisbursed portions of construction loans
Dec. 31, 2013
Undisbursed portions of construction loans
Mar. 31, 2014
Standby letters of credit and financial guarantees
Dec. 31, 2013
Standby letters of credit and financial guarantees
Mar. 31, 2014
Minimum
Undisbursed lines of credit
Mar. 31, 2014
Maximum
Undisbursed lines of credit
Mar. 31, 2014
Maximum
Standby letters of credit and financial guarantees
Mar. 31, 2014
Probable loan loss experience on unfunded obligations [Member]
Dec. 31, 2013
Probable loan loss experience on unfunded obligations [Member]
Commitments and Contingencies                          
Commitments to extend credit $ 197,533,000 $ 192,667,000 $ 195,958,000 $ 191,072,000 $ 21,140,000 $ 26,402,000 $ 1,575,000 $ 1,595,000          
Commitments to extend credit, term of agreement                 1 month 12 months 1 year    
Loss Contingency, Estimate of Possible Loss                       $ 157,000 $ 157,000