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Earnings per share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Weighted average common shares outstanding | A reconciliation of the weighted average common shares outstanding used in the basic and diluted earnings per share calculations follows:
| Three Months Ended | Six Months Ended
| June 30, | June 30,
| 2021 | 2020 | 2021 | 2020
| (In thousands, except per share amounts)
Weighted average common shares outstanding - basic | 201,345 |  | 200,522 |  | 201,028 |  | 200,481 |
Effect of dilutive performance share awards and restricted stock units | 348 |  | 17 |  | 300 |  | 16 |
Weighted average common shares outstanding - diluted | 201,693 |  | 200,539 |  | 201,328 |  | 200,497 |
Shares excluded from the calculation of diluted earnings per share | — |  | 187 |  | — |  | 191 |
Dividends declared per common share | $ | .2125 |  | $ | .2075 |  | $ | .4250 |  | $ | .4150 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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