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Investment Securities Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2014
state
security
Jun. 30, 2013
security
Dec. 31, 2013
security
Investments, Debt and Equity Securities [Abstract]      
Available-for-sale Securities Pledged as Collateral $ 131,869 $ 123,571 $ 147,074
Number of securities temporarily impaired 197 280 304
Number of securities temporarily impaired 175 6 32
Length of time securities temporarily impaired 12 months 12 months 12 months
Number of states in New England where FHLB serve 6    
Federal Home Loan Bank Stock $ 12,875 $ 12,875 $ 12,875