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Regulatory Capital (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Summary of compliance with banking regulatory capital standards | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2023 |  | ​ | ​ | ​ | ​ |
​ | ​ | (As Restated) | ​ | December 31, 2022 | ​
​ | ​ | ​ | ​ | ​ | Percent of | ​ | ​ | ​ | ​ | Percent of |
​ |  | Amount |  | Assets |  | Amount |  | Assets |
​ |  | (Dollars in thousands) | ​
Tier I (leverage) capital: |  | ​ |  |  |  |  | ​ |  |  |  | ​
Capital level | ​ | $ | 914,191 |  | 10.66 | % | $ | 915,628 |  | 10.56 | %
Requirement to be well-capitalized | ​ |  | 428,900 |  | 5.00 | ​ |  | 433,667 |  | 5.00 | ​
Excess | ​ |  | 485,291 |  | 5.66 | ​ |  | 481,961 |  | 5.56 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Equity Tier I risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 914,191 |  | 13.74 | % | $ | 915,628 |  | 13.79 | %
Requirement to be well-capitalized | ​ |  | 432,376 |  | 6.50 | ​ |  | 431,734 |  | 6.50 | ​
Excess | ​ |  | 481,815 |  | 7.24 | ​ |  | 483,894 |  | 7.29 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 914,191 |  | 13.74 | % | $ | 915,628 |  | 13.79 | %
Requirement to be well-capitalized | ​ |  | 532,155 |  | 8.00 | ​ |  | 531,365 |  | 8.00 | ​
Excess | ​ |  | 382,036 |  | 5.74 | ​ |  | 384,263 |  | 5.79 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 952,221 |  | 14.31 | % | $ | 954,457 |  | 14.37 | %
Requirement to be well-capitalized | ​ |  | 665,194 |  | 10.00 | ​ |  | 664,206 |  | 10.00 | ​
Excess | ​ |  | 287,027 |  | 4.31 | ​ |  | 290,251 |  | 4.37 | ​
Holding Company |
Notes Tables |
Summary of compliance with banking regulatory capital standards | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2023 |  | ​ | ​ | ​ | ​ |
​ | ​ | (As Restated) | ​ | December 31, 2022 | ​
​ | ​ | ​ | ​ | ​ | Percent of | ​ | ​ | ​ | ​ | Percent of |
​ |  | Amount |  | Assets |  | Amount |  | Assets |
​ | ​ | (Dollars in thousands) |
Tier I (leverage) capital: |  | ​ |  |  |  |  | ​ |  |  |  | ​
Capital level | ​ | $ | 734,754 |  | 8.54 | % | $ | 746,880 |  | 8.61 | %
Requirement to be well-capitalized | ​ |  | 429,936 |  | 5.00 | ​ |  | 433,607 |  | 5.00 | ​
Excess | ​ |  | 304,818 |  | 3.54 | ​ |  | 313,273 |  | 3.61 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Equity Tier I risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 688,820 |  | 10.36 | % | $ | 698,258 |  | 10.52 | %
Requirement to be well-capitalized | ​ |  | 432,264 |  | 6.50 | ​ |  | 431,635 |  | 6.50 | ​
Excess | ​ |  | 256,556 |  | 3.86 | ​ |  | 266,623 |  | 4.02 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 734,754 |  | 11.05 | % | $ | 746,880 |  | 11.25 | %
Requirement to be well-capitalized | ​ |  | 532,018 |  | 8.00 | ​ |  | 531,243 |  | 8.00 | ​
Excess | ​ |  | 202,736 |  | 3.05 | ​ |  | 215,637 |  | 3.25 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total risk-based capital: | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Capital level | ​ | $ | 962,784 |  | 14.48 | % | $ | 975,709 |  | 14.69 | %
Requirement to be well-capitalized | ​ |  | 665,022 |  | 10.00 | ​ |  | 664,054 |  | 10.00 | ​
Excess | ​ |  | 297,762 |  | 4.48 | ​ |  | 311,655 |  | 4.69 | ​
​

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