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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Common Share |
Schedule of computation of basic and diluted earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ | ​ | March 31, | ​
(Dollars and shares in thousands, except for per share amounts) |  | 2023 |  | 2022 |
Basic earnings per common share: | ​ | ​ |  | ​ | ​ |  | ​
Net income | ​ | $ | 139,926 | ​ | $ | 100,329 | ​
Weighted-average basic common shares | ​ | ​ | 75,902 | ​ | ​ | 71,447 | ​
Basic earnings per common share | ​ | $ | 1.84 | ​ | $ | 1.40 | ​
Diluted earnings per common share: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 139,926 | ​ | $ | 100,329 | ​
Weighted-average basic common shares | ​ | ​ | 75,902 | ​ | ​ | 71,447 | ​
Effect of dilutive securities | ​ | ​ | 487 | ​ | ​ | 664 | ​
Weighted-average dilutive shares | ​ | ​ | 76,389 | ​ | ​ | 72,111 | ​
Diluted earnings per common share | ​ | $ | 1.83 | ​ | $ | 1.39 | ​
Schedule of anti-dilutive securities excluded from computation of diluted earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​ | ​
​ |  | 2023 |  | 2022 |  | ​
Number of shares | ​ | ​ | ​ | ​ | ​ | 57,169 | ​ | ​ | ​ | ​ | ​ | 57,169 | ​ |
Range of exercise prices | ​ | $ | 87.30 | to | $ | 91.35 | ​ | $ | 87.30 | to | $ | 91.35 | ​ | ​

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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