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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Computation of Earnings Per Common Share | A summary of the information used in the computation of earnings per common share follows.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
($ in thousands, except per share data) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income to common shareholders |  | $ | 97,738 |  |  | $ | 135,389 |  |  | $ | 341,999 |  |  | $ | 380,302 |
Net income allocated to participating securities - basic and diluted |  |  | 992 |  |  |  | 2,014 |  |  |  | 3,574 |  |  |  | 5,776 |
Net income allocated to common shareholders - basic and diluted |  | $ | 96,746 |  |  | $ | 133,375 |  |  | $ | 338,425 |  |  | $ | 374,526 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 86,131 |  |  |  | 85,706 |  |  | $ | 86,082 |  |  | $ | 86,141 |
Dilutive potential common shares |  |  | 306 |  |  |  | 314 |  |  |  | 286 |  |  |  | 298 |
Weighted-average common shares - diluted |  |  | 86,437 |  |  |  | 86,020 |  |  | $ | 86,368 |  |  | $ | 86,439 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.12 |  |  | $ | 1.56 |  |  | $ | 3.93 |  |  | $ | 4.35 |
Diluted |  | $ | 1.12 |  |  | $ | 1.55 |  |  | $ | 3.92 |  |  | $ | 4.33 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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