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Borrowings (Tables)
 9 Months Ended
Sep. 30, 2021
Borrowings [Abstract]  
Short-term Borrowings
The following table presents total short-term borrowings as of the dates indicated:

(dollar in thousands)
  
September 30, 2021
    
December 31, 2020
  
Overnight repurchase agreements
  
$
4,496
     $ 6,619  
Total short-term borrowings
  
$
4,496
    
$
6,619
  
                 
Maximum month-end outstanding balance
  
$
12,239
    
$
9,080
  
Average outstanding balance during the period
  
$
8,116
    
$
21,092
  
Average interest rate (year-to-date)
    
0.10
%
     0.19 %
Average interest rate at end of period
    
0.10
%
    
0.10
%