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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2023
Goodwill and Other Intangible Assets |
Summary of gross carrying amounts and accumulated amortization of other intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
(Dollars in thousands) |  | 2023 |  | 2022 |
Gross carrying amount | ​ | $ | 274,455 | ​ | $ | 274,869 | ​
Accumulated amortization | ​ |  | (179,361) | ​ |  | (158,419) | ​
​ | ​ | $ | 95,094 | ​ | $ | 116,450 | ​
Schedule of estimated amortization expense for other intangibles for each of the next five quarters | ​
​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ | ​ | ​ | ​
Quarter ending: |  | ​ |  |
December 31, 2023 | ​ | $ | 6,615 | ​
March 31, 2024 | ​ |  | 6,003 | ​
June 30, 2024 | ​ |  | 5,739 | ​
September 30, 2024 | ​ |  | 5,327 | ​
December 31, 2024 | ​ | ​ | 5,326 | ​
Thereafter | ​ |  | 60,429 | ​
​ | ​ | $ | 89,439 | ​
​

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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