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MORTGAGE SERVICING RIGHTS
 9 Months Ended
Sep. 30, 2022
MORTGAGE SERVICING RIGHTS [Abstract]  
MORTGAGE SERVICING RIGHTS

5.  MORTGAGE SERVICING RIGHTS

The following table reflects the changes in fair value of the Company’s mortgage servicing rights asset included in the Consolidated Balance Sheets, and other information related to the serviced portfolio, for the periods or dates presented (dollars in thousands):

   
Three Months Ended
September 30,
    
Nine Months Ended
September 30,
  
   
2022
    
2021
    
2022
    
2021
  
Beginning balance
  
$
27,505
    
$
15,977
    
$
19,700
    
$
9,049
  
Additions
    
514
      
2,026
      
2,694
      
8,018
  
Valuation adjustment
    
405
      
119
   
6,030
      
1,055
  
Ending balance
  
$
28,424
    
$
18,122
    
$
28,424
    
$
18,122
  

   
September 30,
    
December 31,
  
   
2022
    
2021
  
Mortgage loans serviced for others
  
$
2,053,183
    
$
1,953,095
  
Mortgage servicing rights assets as a percentage of serviced mortgage loans
    
1.38
%
    
1.01
%

The following table reflects the key assumptions used in measuring the fair value of the Company's mortgage servicing rights as of the dates indicated:

   
  September 30,
    
December 31,
  
   
2022
    
2021
  
Weighted average constant prepayment rate
    
7.34
%
    
12.35
%
Weighted average discount rate
    
9.14
%
    
9.14
%
Weighted average life in years
    
8.00
      
6.03