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Earnings Per Common Share (Tables) | 6 Months Ended
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Jun. 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 |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
($ in thousands, except per share data) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income to common shareholders |  | $ | 117,794 |  |  | $ | 121,435 |  |  | $ | 244,261 |  |  | $ | 244,913 |
Net income allocated to participating securities - basic and diluted |  |  | 1,224 |  |  |  | 1,844 |  |  |  | 2,582 |  |  |  | 3,762 |
Net income allocated to common shareholders - basic and diluted |  | $ | 116,570 |  |  | $ | 119,591 |  |  | $ | 241,679 |  |  | $ | 241,151 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 86,096 |  |  |  | 86,067 |  |  | $ | 86,057 |  |  | $ | 86,362 |
Dilutive potential common shares |  |  | 274 |  |  |  | 287 |  |  |  | 293 |  |  |  | 292 |
Weighted-average common shares - diluted |  |  | 86,370 |  |  |  | 86,354 |  |  | $ | 86,350 |  |  | $ | 86,654 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.35 |  |  | $ | 1.39 |  |  | $ | 2.81 |  |  | $ | 2.79 |
Diluted |  | $ | 1.35 |  |  | $ | 1.38 |  |  | $ | 2.80 |  |  | $ | 2.78 |

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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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