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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted Earnings Per Common Share | The following table sets forth the computation of basic and diluted earnings per common share:
|  | Three months ended |  |  |  | Six months ended |  |  |
| (common shares in thousands) | June 30, 2020 |  | June 30, 2019 |  | June 30, 2020 |  | June 30, 2019 |
| Numerator: |  |  |  |  |  |  |  |
| Net income available to RenaissanceRe common shareholders | $ | 575,845 |  |  | $ | 367,854 |  |  | $ | 493,871 |  |  | $ | 641,571 |  |
| Amount allocated to participating common shareholders (1) | (7,593) |  |  | (4,393) |  |  | (6,153) |  |  | (7,483) |  |
| Net income allocated to RenaissanceRe common shareholders | $ | 568,252 |  |  | $ | 363,461 |  |  | $ | 487,718 |  |  | $ | 634,088 |  |
| Denominator: |  |  |  |  |  |  |  |
| Denominator for basic income per RenaissanceRe common share - weighted average common shares | 44,939 |  |  | 43,483 |  |  | 44,190 |  |  | 42,774 |  |
| Per common share equivalents of employee stock options and non-vested shares | 64 |  |  | 38 |  |  | 63 |  |  | 32 |  |
| Denominator for diluted income per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions | 45,003 |  |  | 43,521 |  |  | 44,253 |  |  | 42,806 |  |
| Net income available to RenaissanceRe common shareholders per common share – basic | $ | 12.64 |  |  | $ | 8.36 |  |  | $ | 11.04 |  |  | $ | 14.82 |  |
| Net income available to RenaissanceRe common shareholders per common share – diluted | $ | 12.63 |  |  | $ | 8.35 |  |  | $ | 11.02 |  |  | $ | 14.81 |  |
(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 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=6371337&loc=d3e3550-109257 + Details
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