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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies [Abstract]  
Financial Instruments whose Contract Amounts Represent Credit Risk
The following financial instruments whose contract amounts represent credit risk were outstanding at:

  
December 31,
 
(dollars in thousands)
 
2019
  
2018
 
Commitments to extend credit:
      
Home equity lines of credit
 
$
62,267
  
$
61,014
 
Commercial real estate, construction and development loans committed but not funded
  
15,637
   
12,165
 
Other lines of credit (principally commercial)
  
62,321
   
74,058
 
Total
 
$
140,225
  
$
147,237
 
         
Letters of credit
 
$
7,724
  
$
8,230