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Interest Rate Swap Derivatives (Tables)
6 Months Ended
Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of information about the interest rate swaps designated as cash flow hedges
 
    June 30, 2016     December 31, 2015  
    (Dollars in thousands)  
       
Notional Amounts   $ 10,000     $ 10,000  
Weighted average pay rates     5.35 %     5.35 %
Weighted average receive rates     2.05 %     1.91 %
Weigted average maturity     12.58 years       13.08 years  
Unrealized losses   $ 2,973     $ 2,013