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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Calculation of earnings (loss) per share | Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.
Earnings per share |  |  |  |
Table | 6.1 |  |  |  |  |  |  |  |
|  |  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands, except per share data) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Basic earnings per share: |  |  |  |  |  |  |  |
Net income |  | $ | 153,051 |  |  | $ | 14,047 |  |  | $ | 303,072 |  |  | $ | 163,852 |
Weighted average common shares outstanding - basic |  | 339,326 |  |  | 338,593 |  |  | 339,116 |  |  | 341,323 |
Basic earnings per share |  | $ | 0.45 |  |  | $ | 0.04 |  |  | $ | 0.89 |  |  | $ | 0.48 |
Diluted earnings per share: |  |  |  |  |  |  |
Net income |  | $ | 153,051 |  |  | $ | 14,047 |  |  | $ | 303,072 |  |  | $ | 163,852 |
Interest expense, net of tax (1): |  |  |  |  |  |  |  |
9% Debentures |  | 3,712 |  |  | — |  |  | 7,423 |  |  | 9,132 |
Diluted income available to common shareholders |  | $ | 156,763 |  |  | $ | 14,047 |  |  | $ | 310,495 |  |  | $ | 172,984 |
Weighted average common shares outstanding - basic |  | 339,326 |  |  | 338,593 |  |  | 339,116 |  |  | 341,323 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Unvested RSUs |  | 1,425 |  |  | 1,068 |  |  | 1,560 |  |  | 1,551 |
9% Debentures |  | 15,785 |  |  | — |  |  | 15,785 |  |  | 19,129 |
Weighted average common shares outstanding - diluted |  | 356,536 |  |  | 339,661 |  |  | 356,461 |  |  | 362,003 |
Diluted earnings per share |  | $ | 0.44 |  |  | $ | 0.04 |  |  | $ | 0.87 |  |  | $ | 0.48 |
(1) Interest expense for the three and six months ended June 30, 2021 and 2020, respectively, has been tax effected at a rate of 21%.

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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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