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Derivative Instruments (Table)
 9 Months Ended
Sep. 30, 2013
Derivative instruments and hedging activities disclosure abstract  
Schedule of Derivative Instruments [Table Text Block]
     Other Other
     Assets Liabilities
     Estimated Estimated
(Dollars in thousands) Notional Fair Value Fair Value
September 30, 2013:      
Pay fixed / receive variable$ 5,104  —  923
Pay variable / receive fixed  5,104  923  —
 Total interest rate swap agreements$ 10,208  923  923
December 31, 2012:      
Pay fixed / receive variable$ 5,367  —  1,210
Pay variable / receive fixed  5,367  1,210  —
 Total interest rate swap agreements$ 10,734  1,210  1,210