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Restricted Investment in Bank Stock (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Restricted Investment in Bank Stock [Abstract]        
Cash Dividends $ 61,637 $ 65,897 $ 188,126 $ 203,073