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Debt and Credit Facilities (Summary of Debt Obligations) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Debt Instrument [Line Items] |  |
Long-term debt, fair value | $ 964,800 | $ 973,342
Long-term debt | 948,663 | 960,495
RenaissanceRe Finance, Inc. | 3.700% Senior Notes Due April 1, 2025 |  |
Debt Instrument [Line Items] |  |
Long-term debt, fair value | 291,750 | 287,100
Long-term debt | 296,948 | 296,577
RenRe North America Holdings Inc | 5.75% Senior Notes Due March 15, 2020 |  |
Debt Instrument [Line Items] |  |
Long-term debt, fair value | 270,875 | 270,000
Long-term debt | 248,941 | 248,610
Platinum Underwriters Finance, Inc | Series B 7.50% Notes Due June 1, 2017 |  |
Debt Instrument [Line Items] |  |
Long-term debt, fair value | 257,500 | 267,500
Long-term debt | 255,352 | 268,196
DaVinciRe Holdings Ltd. | 4.750% Senior Notes Due May 1, 2025 |  |
Debt Instrument [Line Items] |  |
Long-term debt, fair value | 144,675 | 148,742
Long-term debt | $ 147,422 | $ 147,112

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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