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Acquisition of Platinum Purchase Price (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2015 | Mar. 31, 2015 | Mar. 02, 2015 | Mar. 01, 2015
Common Shares |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Dividends per common share, in usd per share | $ 0.3 | $ 0.3 |  |
Share price, in usd per share |  |  | $ 102.47 |
Platinum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Agreed cash price paid to common shareholders of Platinum and Platinum Awards, in usd per share |  |  | $ 76 |
Cash consideration paid by RenaissanceRe to common shareholders of Platinum and holders of Platinum equity awards |  |  | $ 1,160,000 |
Aggregate consideration transferred |  |  | 1,932,405 |
Total net purchase price paid by RenaissanceRe |  |  | $ 1,679,202 |
Platinum | Common Shares |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of Platinum common shares and Platinum equity awards canceled in the acquisition of Platinum |  |  | 25,320,312 |
Shares issued |  |  | 7,434,561 |
Shares issued, value |  |  | $ 761,819 |
Fair value of Platinum common shares owned by RenaissanceRe and canceled in connection with the acquisition of Platinum |  |  | $ 12,950 |
Platinum common shares owned by RenaissanceRe and canceled in connection with the acquisition of Platinum |  |  | (169,220) |
Number of Platinum common shares and Platinum equity awards canceled in the acquisition of Platinum excluding those owned by RenaissanceRe and canceled in connection with the acquisition of Platinum |  |  | 25,151,092 |
Agreed cash price paid to common shareholders of Platinum and Platinum Awards, in usd per share |  |  | $ 35.96 |
Cash consideration paid by RenaissanceRe to common shareholders of Platinum and holders of Platinum equity awards |  |  | $ 904,433 |
Platinum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of Platinum common shares and Platinum equity awards canceled in the acquisition of Platinum |  |  |  | 25,320,312
Dividends per common share, in usd per share |  |  |  | $ 10
Dividends paid, value |  |  | $ 253,203 | $ 253,203

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