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Premises and Equipment (Details Textual) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Renewal_Terms
NonCancellableOpetaringLease
Dec. 31, 2011
Dec. 31, 2010
Premises And Equipment (Textual) [Abstract]      
Depreciation on premises and equipment $ 1,948 $ 1,823 $ 1,726
Non cancelable operating leases having remaining term less than one year 14    
Rental expense, net of rental income 351 349 368
Sale leaseback transaction, lease term 17 years    
Sale leaseback transaction, number of automatic renewals 2    
Sale Leaseback Transaction, Two automatic Lease Renewal, Period 5 years 5 years  
Sale leaseback transaction, sale of property, amount 1,200    
Sale leaseback transaction, deferred gain 489    
Sale leaseback transaction, gain recognized $ 19 $ 16 $ 14