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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | $ 214,350 | $ 172,556 | $ 346,624 | $ 350,737
Change in net unrealized gains on investments | 219 | 672 | (1,272) | 229
Comprehensive income | 214,569 | 173,228 | 345,352 | 350,966
Net income attributable to redeemable noncontrolling interests | (37,612) | (30,635) | (71,939) | (75,226)
Comprehensive income attributable to noncontrolling interests | (37,612) | (30,635) | (71,939) | (75,226)
Comprehensive income attributable to RenaissanceRe | 176,957 | 142,593 | 273,413 | 275,740
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | 2,507 | 2,097 | 5,818 | 3,168
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive income | 2,507 | 2,097 | 5,818 | 3,168
Net income attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to RenaissanceRe | 2,507 | 2,097 | 5,818 | 3,168
Reportable Legal Entities | Platinum Underwriters Finance, Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | 17,995 | 13,967 | 30,570 | 37,827
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive income | 17,995 | 13,967 | 30,570 | 37,827
Net income attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to RenaissanceRe | 17,995 | 13,967 | 30,570 | 37,827
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | 10,391 | 8,974 | 14,931 | 22,920
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive income | 10,391 | 8,974 | 14,931 | 22,920
Net income attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to RenaissanceRe | 10,391 | 8,974 | 14,931 | 22,920
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | 176,738 | 141,921 | 274,685 | 275,511
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive income | 176,738 | 141,921 | 274,685 | 275,511
Net income attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to RenaissanceRe | 176,738 | 141,921 | 274,685 | 275,511
Reportable Legal Entities | Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | 226,895 | 181,077 | 369,561 | 357,673
Change in net unrealized gains on investments | 219 | 672 | (1,272) | 229
Comprehensive income | 227,114 | 181,749 | 368,289 | 357,902
Net income attributable to redeemable noncontrolling interests | (37,612) | (30,635) | (71,939) | (75,226)
Comprehensive income attributable to noncontrolling interests | (37,612) | (30,635) | (71,939) | (75,226)
Comprehensive income attributable to RenaissanceRe | 189,502 | 151,114 | 296,350 | 282,676
Consolidating Adjustments |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income | (220,176) | (175,480) | (348,941) | (346,362)
Change in net unrealized gains on investments | 0 | 0 | 0 | 0
Comprehensive income | (220,176) | (175,480) | (348,941) | (346,362)
Net income attributable to redeemable noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to noncontrolling interests | 0 | 0 | 0 | 0
Comprehensive income attributable to RenaissanceRe | $ (220,176) | $ (175,480) | $ (348,941) | $ (346,362)

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