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Debt and Credit Facilities (Summary of Debt Obligations) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt, fair value	$ 988,923	$ 279,000
Debt, carrying value	969,221	249,522
RenaissanceRe Finance, Inc. | 3.700% Senior Notes Due April 1, 2025
Debt Instrument [Line Items]
Debt, fair value	293,148	0
Debt, carrying value	299,430	0
RenRe North America Holdings Inc. | 5.75% Senior Notes Due March 15, 2020
Debt Instrument [Line Items]
Debt, fair value	275,000	279,000
Debt, carrying value	249,591	249,522
Platinum Underwriters Finance, Inc. | Series B 7.50% Notes Due June 1, 2017
Debt Instrument [Line Items]
Debt, fair value	272,033	0
Debt, carrying value	271,407	0
DaVinciRe Holdings Ltd. | 4.750% Senior Notes Due May 1, 2025
Debt Instrument [Line Items]
Debt, fair value	148,742	0
Debt, carrying value	$ 148,793	$ 0

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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