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Note J - Subordinated Debentures and Trust Preferred Securities (Details Textual) - USD ($)
$ in Thousands
Mar. 15, 2012
Mar. 22, 2007
Dec. 31, 2017
Dec. 31, 2016
Proceeds from Issuance of Trust Preferred Securities   $ 8,500    
Debt Instrument, Interest Rate, Stated Percentage   6.58% 3.27% 2.64%
Debt Instrument, Term   5 years    
Debt Issuance Costs, Net     $ 0 $ 0
London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.68%