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Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
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 |  | Nine months ended |
| (common shares in thousands) | September 30, 2018 |  | September 30, 2017 |  | September 30, 2018 |  | September 30, 2017 |
| Numerator: |  |  |  |  |  |  |  |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders | $ | 32,681 |  |  | $ | (504,812 | ) |  | $ | 281,182 |  |  | $ | (241,318 | ) |
| Amount allocated to participating common shareholders (1) | (294 | ) |  | (116 | ) |  | (2,977 | ) |  | (344 | ) |
| Net income (loss) allocated to RenaissanceRe common shareholders | $ | 32,387 |  |  | $ | (504,928 | ) |  | $ | 278,205 |  |  | $ | (241,662 | ) |
| Denominator: |  |  |  |  |  |  |  |
| Denominator for basic income per RenaissanceRe common share - weighted average common shares | 39,624 |  |  | 39,591 |  |  | 39,606 |  |  | 39,979 |  |
| Per common share equivalents of employee stock options and restricted shares | 13 |  |  | — |  |  | 21 |  |  | — |  |
| Denominator for diluted income per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions | 39,637 |  |  | 39,591 |  |  | 39,627 |  |  | 39,979 |  |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – basic | $ | 0.82 |  |  | $ | (12.75 | ) |  | $ | 7.02 |  |  | $ | (6.04 | ) |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – diluted | $ | 0.82 |  |  | $ | (12.75 | ) |  | $ | 7.02 |  |  | $ | (6.04 | ) |
(1) | Represents earnings attributable to holders of unvested restricted shares issued pursuant to the Company’s 2001 Stock Incentive Plan, 2010 Performance-Based Equity Incentive Plan, 2016 Long-Term Incentive Plan and to the Company’s non-employee directors.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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