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Off-Balance Sheet Activities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Unused lines of credit and letters of credit - Fixed Rate [Member]    
Contractual amount of financial instruments with off-balance sheet risk $ 9,219 $ 14,445
Unused lines of credit and letters of creditt - Variable Rate [Member]    
Contractual amount of financial instruments with off-balance sheet risk 38,422 77,089
Commitments to fund loans (at market rates) - Fixed Rate [Member]    
Contractual amount of financial instruments with off-balance sheet risk 16,788 18,654
Commitments to fund loans (at market rates) - Variable Rate [Member]    
Contractual amount of financial instruments with off-balance sheet risk $ 3,005 $ 1,740