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Acquisition of Platinum Supplemental ProForma Information (Details) - Platinum - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition [Line Items] |  |
Total revenues | $ 1,593,735 | $ 1,872,612
Net income available to RenaissanceRe common shareholders | $ 423,768 | $ 685,735

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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