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Regulatory Capital (Tables) | 3 Months Ended
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Mar. 31, 2023
Notes Tables |
Summary of compliance with banking regulatory capital standards | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2023 (As Restated) |  | December 31, 2022 |
​ | ​ | ​ | ​ | ​ | Percent of | ​ | ​ | ​ | ​ | Percent of |
​ |  | Amount |  | Assets |  | Amount |  | Assets |
​ |  | (Dollars in thousands) | ​
Tier I (leverage) capital: |  | ​ |  |  |  |  | ​ |  |  |  | ​
Capital level | ​ | $ | 905,323 |  | 10.53 | % | $ | 915,628 |  | 10.56 | %
Requirement to be well-capitalized | ​ |  | 429,793 |  | 5.00 | ​ |  | 433,667 |  | 5.00 | ​
Excess | ​ |  | 475,530 |  | 5.53 | ​ |  | 481,961 |  | 5.56 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Equity Tier I risk-based capital: | ​ |  |  |  |  | ​ |  |  |  |  | ​
Capital level | ​ | $ | 905,323 |  | 13.59 | % | $ | 915,628 |  | 13.79 | %
Requirement to be well-capitalized | ​ |  | 433,057 |  | 6.50 | ​ |  | 431,734 |  | 6.50 | ​
Excess | ​ |  | 472,266 |  | 7.09 | ​ |  | 483,894 |  | 7.29 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I risk-based capital: | ​ |  |  |  |  | ​ |  |  |  |  | ​
Capital level | ​ | $ | 905,323 |  | 13.59 | % | $ | 915,628 |  | 13.79 | %
Requirement to be well-capitalized | ​ |  | 532,993 |  | 8.00 | ​ |  | 531,365 |  | 8.00 | ​
Excess | ​ |  | 372,330 |  | 5.59 | ​ |  | 384,263 |  | 5.79 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total risk-based capital: | ​ |  |  |  |  | ​ |  |  |  |  | ​
Capital level | ​ | $ | 943,569 |  | 14.16 | % | $ | 954,457 |  | 14.37 | %
Requirement to be well-capitalized | ​ |  | 666,242 |  | 10.00 | ​ |  | 664,206 |  | 10.00 | ​
Excess | ​ |  | 277,327 |  | 4.16 | ​ |  | 290,251 |  | 4.37 | ​
Holding Company |
Notes Tables |
Summary of compliance with banking regulatory capital standards | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2023 (As Restated) |  | December 31, 2022 |
​ | ​ | ​ | ​ | ​ | Percent of | ​ | ​ | ​ | ​ | Percent of |
​ |  | Amount |  | Assets |  | Amount |  | Assets |
​ | ​ | (Dollars in thousands) |
Tier I (leverage) capital: |  | ​ |  |  |  |  | ​ |  |  |  | ​
Capital level | ​ | $ | 736,024 |  | 8.56 | % | $ | 746,880 |  | 8.61 | %
Requirement to be well-capitalized | ​ |  | 429,762 |  | 5.00 | ​ |  | 433,607 |  | 5.00 | ​
Excess | ​ |  | 306,622 |  | 3.56 | ​ |  | 313,273 |  | 3.61 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Equity Tier I risk-based capital: | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Capital level | ​ | $ | 689,732 |  | 10.36 | % | $ | 698,258 |  | 10.52 | %
Requirement to be well-capitalized | ​ |  | 432,909 |  | 6.50 | ​ |  | 431,635 |  | 6.50 | ​
Excess | ​ |  | 256,823 |  | 3.86 | ​ |  | 266,623 |  | 4.02 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I risk-based capital: | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Capital level | ​ | $ | 736,024 |  | 11.05 | % | $ | 746,880 |  | 11.25 | %
Requirement to be well-capitalized | ​ |  | 532,812 |  | 8.00 | ​ |  | 531,243 |  | 8.00 | ​
Excess | ​ |  | 203,212 |  | 3.05 | ​ |  | 215,637 |  | 3.25 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total risk-based capital: | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Capital level | ​ | $ | 964,270 |  | 14.48 | % | $ | 975,709 |  | 14.69 | %
Requirement to be well-capitalized | ​ |  | 666,015 |  | 10.00 | ​ |  | 664,054 |  | 10.00 | ​
Excess | ​ |  | 298,255 |  | 4.48 | ​ |  | 311,655 |  | 4.69 | ​
​

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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