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Subordinated Debentures (Tables)
 12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]  
Schedule of summarizes activities for our subordinated debentures
The following table summarizes activities for our subordinated debentures for the periods indicated:
 
Year Ended December 31,
 
2016
 
2015
 
(dollars in thousands)
Average balance outstanding
$
69,347

 
$
69,199

Maximum amount outstanding at any month-end during the year
69,383

 
69,263

Balance outstanding at end of year
69,383

 
69,263

Weighted average interest rate during the year
5.54
%
 
5.69
%