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Fair Value of Assets and Liabilities (Details 3) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Losses recognized in earnings for trust preferred securities held    
Beginning balance, Amount of OTTI related to credit loss $ 140 $ 140
Additions in QTD 0  
Ending balance, Amount of OTTI related to credit loss 140  
Trapeza IX B-1 | Moodys Caa2 Rating | Fitch CC Rating    
Losses recognized in earnings for trust preferred securities held    
Beginning balance, Amount of OTTI related to credit loss 140 $ 140
Additions in QTD 0  
Ending balance, Amount of OTTI related to credit loss $ 140