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Regulatory Capital Requirements (Tables)
9 Months Ended
Sep. 30, 2023
Regulatory Capital Requirements [Abstract]  
Actual Capital Amounts and Ratios
The Bank and the Company reported the following capital ratios as of September 30, 2023 and December 31, 2022:

(Bank Only)              
Minimum for
 
 
 
As of September 30, 2023
   
Well
  Capital Adequacy plus
  Capital Conservation
(dollars in thousands)
 
Amount
   
Ratio
   
Capitalized(1)
   
Buffer (1)(2)
 
 
                       
Tier 1 leverage ratio
 
$
634,460
     
10.452
%
   
5.000
%
   
4.000
%
Common equity tier 1 capital
   
634,460
     
18.395
     
6.500
     
7.000
 
Tier 1 risk-based capital
   
634,460
     
18.395
     
8.000
     
8.500
 
Total risk-based capital
   
677,649
     
19.647
     
10.000
     
10.500
 

 
 
As of December 31, 2022
   
Well
   
Minimum for
 
Capital Adequacy plus
Capital Conservation
(dollars in thousands)
 
Amount
   
Ratio
   
Capitalized(1)
   
Buffer (1)(2)
 
 
                       
Tier 1 leverage ratio
 
$
609,998
     
10.116
%
   
5.000
%
   
4.000
%
Common equity tier 1 capital
   
609,998
     
18.431
     
6.500
     
7.000
 
Tier 1 risk-based capital
   
609,998
     
18.431
     
8.000
     
8.500
 
Total risk-based capital
   
651,462
     
19.684
     
10.000
     
10.500
 

(Consolidated)
           
   
As of September 30, 2023
   
Minimum for
 
Capital Adequacy plus
Capital Conservation
(dollars in thousands)
 
Amount
   
Ratio
   
Buffer (1)(2)
 
 
                 
Tier 1 leverage ratio

$
654,879
     
10.785
%
   
4.000
%
Common equity tier 1 capital
 

654,879
     
18.982
     
7.000
 
Tier 1 risk-based capital
 

654,879
     
18.982
     
8.500
 
Total risk-based capital
 

698,079
     
20.234
     
10.500
 

 
 
As of December 31, 2022
   
Minimum for
 
Capital Adequacy plus
Capital Conservation
(dollars in thousands)
 
Amount
   
Ratio
   
Buffer (1)(2)
 
 
                 
Tier 1 leverage ratio
 
$
626,628
     
10.390
%
   
4.000
%
Common equity Tier 1 capital
   
626,628
     
18.929
     
7.000
 
Tier 1 risk-based capital
   
626,628
     
18.929
     
8.500
 
Total risk-based capital
   
668,102
     
20.182
     
10.500
 

(1)
Federal regulatory minimum requirements to be considered to be Well Capitalized and Adequately Capitalized
(2)
The September 30, 2023 and December 31, 2022 common equity tier 1, tier 1 risk-based, and total risk-based capital ratios include a capital conservation buffer of 2.50 percent