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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2015
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 |
| (thousands of shares) | June 30, 2015 |  | June 30, 2014 |  | June 30, 2015 |  | June 30, 2014 |
| Numerator: |  |  |  |  |  |  |  |
| Net income available to RenaissanceRe common shareholders | $ | 73,233 |  |  | $ | 120,752 |  |  | $ | 241,076 |  |  | $ | 271,755 |  |
| Amount allocated to participating common shareholders (1) | (819 | ) |  | (1,557 | ) |  | (2,781 | ) |  | (3,577 | ) |
| Net income allocated to RenaissanceRe common shareholders | $ | 72,414 |  |  | $ | 119,195 |  |  | $ | 238,295 |  |  | $ | 268,178 |  |
| Denominator: |  |  |  |  |  |  |  |
| Denominator for basic income per RenaissanceRe common share - weighted average common shares | 45,303 |  |  | 39,736 |  |  | 42,467 |  |  | 40,487 |  |
| Per common share equivalents of employee stock options and restricted shares | 354 |  |  | 659 |  |  | 372 |  |  | 662 |  |
| Denominator for diluted income per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions | 45,657 |  |  | 40,395 |  |  | 42,839 |  |  | 41,149 |  |
| Net income available to RenaissanceRe common shareholders per common share – basic | $ | 1.60 |  |  | $ | 3.00 |  |  | $ | 5.61 |  |  | $ | 6.62 |  |
| Net income available to RenaissanceRe common shareholders per common share – diluted | $ | 1.59 |  |  | $ | 2.95 |  |  | $ | 5.56 |  |  | $ | 6.52 |  |
(1) | Represents earnings attributable to holders of unvested restricted shares issued under the Company’s 2001 Stock Incentive Plan and Non-Employee Director Stock Incentive Plan.

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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/2003/role/presentationRef -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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