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Derivative Financial Instruments and Repurchase Agreements (Tables)
 3 Months Ended
Mar. 31, 2018
Derivative Financial Instruments and Repurchase Agreements [Abstract]  
Schedule of fair values of derivative instruments on the balance sheet
  Asset Derivatives Liability Derivatives
  March 31, 2018 March 31, 2018
($ in thousands) Balance Sheet Fair  Balance Sheet Fair 
  Location Value  Location Value 
Derivatives not designated as hedging instruments:          
Interest rate contracts Other Assets $1,144  Other Liabilities $1,144 

 

  Asset Derivatives Liability Derivatives
  December 31, 2017 December 31, 2017
($ in thousands) Balance Sheet Fair  Balance Sheet Fair 
  Location Value  Location Value 
Derivatives not designated as hedging instruments:          
Interest rate contracts Other Assets $698  Other Liabilities $698