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Earnings (Loss) Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Computation of Earnings (Loss) Per Common Share | A summary of the information used in the computation of earnings (loss) per common share follows.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in thousands, except per share data) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) to common shareholders |  | $ | 129,582 |  |  | $ | 79,356 |  |  | $ | 325,472 |  |  | $ | (148,749 | )
Net dividends or income allocated to participating securities - basic and diluted |  |  | 2,419 |  |  |  | 1,435 |  |  |  | 6,650 |  |  |  | 1,278 |
Net income (loss) allocated to common shareholders - basic and diluted |  | $ | 127,163 |  |  | $ | 77,921 |  |  | $ | 318,822 |  |  | $ | (150,027 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares - basic |  |  | 86,834 |  |  |  | 86,358 |  |  | $ | 86,800 |  |  | $ | 86,614 |
Dilutive potential common shares |  |  | 172 |  |  |  | 42 |  |  |  | 151 |  |  |  | — |
Weighted-average common shares - diluted |  |  | 87,006 |  |  |  | 86,400 |  |  | $ | 86,951 |  |  | $ | 86,614 |
Earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.46 |  |  | $ | 0.90 |  |  | $ | 3.67 |  |  | $ | (1.73 | )
Diluted |  | $ | 1.46 |  |  | $ | 0.90 |  |  | $ | 3.67 |  |  | $ | (1.73 | )

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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 http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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