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Commitments and Contingencies (Details) (USD $)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Commitments to extend credit
Dec. 31, 2012
Commitments to extend credit
Jun. 30, 2013
Commitments to originate residential first and second mortgage loans
Dec. 31, 2012
Commitments to originate residential first and second mortgage loans
Jun. 30, 2013
Standby letters of credit
Dec. 31, 2012
Standby letters of credit
Jun. 30, 2013
Standby letters of credit
Minimum
Jun. 30, 2013
Standby letters of credit
Maximum
Contractual amount of off-balance-sheet financial instruments                  
Amounts accrued for estimated losses for the financial instruments $ 0                
Total contractual amount of off-balance-sheet financial instruments   $ 132,996,000 $ 118,412,000 $ 4,299,000 $ 5,171,000 $ 2,512,000 $ 2,995,000    
Remaining term of standby letters of credit               1 month 5 years