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FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK: (Tables)
 12 Months Ended
Dec. 31, 2019
Risks and Uncertainties [Abstract]  
Summary of Commitment and Contingent Liabilities
Commitment and contingent liabilities are summarized as follows at December 31:
(Dollar amounts in thousands)
 
2019
 
2018
Home Equity
 
$
87,327

 
$
57,341

Commercial Operating Lines
 
358,561

 
285,524

Other Commitments
 
105,872

 
81,593

TOTAL
 
$
551,760

 
$
424,458

Commercial letters of credit
 
$
3,851

 
$
4,673