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Fair Value (Details 3) - Trapeza IX B-1 - Fitch C C Rating - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Moodys Caa2 Rating                
Losses recognized in earnings for trust preferred securities held                
Beginning balance, Amount of OTTI related to credit loss       $ 140        
Additional credit losses on debt securities for which other-than- temporary impairment was previously recognized $ 0 $ 0 $ 0 0        
Ending balance, Amount of OTTI related to credit loss $ 140       $ 140      
Moodys Ca Rating                
Losses recognized in earnings for trust preferred securities held                
Beginning balance, Amount of OTTI related to credit loss       $ 140       $ 140
Additional credit losses on debt securities for which other-than- temporary impairment was previously recognized         0 $ 0 $ 0 $ 0
Ending balance, Amount of OTTI related to credit loss         $ 140