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Condensed Consolidating Financial Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | $ (703,494) | $ 188,061 | $ (356,870) | $ 538,798
Change in net unrealized gains on investments | 300 | 284 | (972) | 513
Comprehensive (loss) income | (703,194) | 188,345 | (357,842) | 539,311
Net loss (income) attributable to redeemable noncontrolling interests | 204,277 | (35,641) | 132,338 | (110,867)
Comprehensive loss attributable to redeemable noncontrolling interests | 204,277 | (35,641) | 132,338 | (110,867)
Comprehensive (loss) income attributable to RenaissanceRe | (498,917) | 152,704 | (225,504) | 428,444
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | 2,751 | 2,941 | 8,569 | 6,109
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive (loss) income | 2,751 | 2,941 | 8,569 | 6,109
Net loss (income) attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive loss attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive (loss) income attributable to RenaissanceRe | 2,751 | 2,941 | 8,569 | 6,109
Reportable Legal Entities | Platinum Underwriters Finance, Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | 25 | (1,731) | 30,595 | 36,096
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive (loss) income | 25 | (1,731) | 30,595 | 36,096
Net loss (income) attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive loss attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive (loss) income attributable to RenaissanceRe | 25 | (1,731) | 30,595 | 36,096
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | (27,145) | (7,511) | (12,214) | 15,409
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive (loss) income | (27,145) | (7,511) | (12,214) | 15,409
Net loss (income) attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive loss attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive (loss) income attributable to RenaissanceRe | (27,145) | (7,511) | (12,214) | 15,409
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | (499,217) | 152,420 | (224,532) | 427,931
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive (loss) income | (499,217) | 152,420 | (224,532) | 427,931
Net loss (income) attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive loss attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive (loss) income attributable to RenaissanceRe | (499,217) | 152,420 | (224,532) | 427,931
Reportable Legal Entities | Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | (692,646) | 203,405 | (323,085) | 561,078
Change in net unrealized gains on investments | 300 | 284 | (972) | 513
Comprehensive (loss) income | (692,346) | 203,689 | (324,057) | 561,591
Net loss (income) attributable to redeemable noncontrolling interests | 204,277 | (35,641) | 132,338 | (110,867)
Comprehensive loss attributable to redeemable noncontrolling interests | 204,277 | (35,641) | 132,338 | (110,867)
Comprehensive (loss) income attributable to RenaissanceRe | (488,069) | 168,048 | (191,719) | 450,724
Consolidating Adjustments |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net (loss) income | 512,738 | (161,463) | 163,797 | (507,825)
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive (loss) income | 512,738 | (161,463) | 163,797 | (507,825)
Net loss (income) attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive loss attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive (loss) income attributable to RenaissanceRe | $ 512,738 | $ (161,463) | $ 163,797 | $ (507,825)

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