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Note A - Summary of Significant Accounting Policies - Composition of Loan Portfolio (Details)
Dec. 31, 2016
Dec. 31, 2015
% Total Loans 100.00% 100.00%
Residential Portfolio Segment [Member]    
% Total Loans 38.92% 38.22%
Commercial Real Estate Portfolio Segment [Member]    
% Total Loans 29.12% 28.90%
Consumer Portfolio Segment [Member]    
% Total Loans 18.27% 18.89%
Commercial Portfolio Segment [Member]    
% Total Loans 13.69% 13.99%