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Earnings Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per common share:
|  |  |  | Three months ended |
| (common shares in thousands) |  |  |  |  | March 31, 2021 |  | March 31, 2020 |
| Numerator: |  |  |  |  |  |  |  |
| Net loss attributable to RenaissanceRe common shareholders |  |  |  |  | $ | (290,934) |  |  | $ | (81,974) |  |
| Amount allocated to participating common shareholders (1) |  |  |  |  | (129) |  |  | (146) |  |
| Net loss allocated to RenaissanceRe common shareholders |  |  |  |  | $ | (291,063) |  |  | $ | (82,120) |  |
| Denominator: |  |  |  |  |  |  |  |
| Denominator for basic loss per RenaissanceRe common share - weighted average common shares |  |  |  |  | 49,579 |  |  | 43,441 |  |
| Per common share equivalents of employee stock options and non-vested shares |  |  |  |  | — |  |  | — |  |
| Denominator for diluted loss per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions |  |  |  |  | 49,579 |  |  | 43,441 |  |
| Net loss attributable to RenaissanceRe common shareholders per common share – basic |  |  |  |  | $ | (5.87) |  |  | $ | (1.89) |  |
| Net loss attributable to RenaissanceRe common shareholders per common share – diluted |  |  |  |  | $ | (5.87) |  |  | $ | (1.89) |  |
(1)Represents earnings and dividends attributable to holders of unvested shares issued pursuant to the Company's stock compensation plans.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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