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Schedule II. Condensed Financial Information Of Registrant (Statements of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows (used in) provided by operating activities |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to RenaissanceRe | $ 197,101 | $ 55,088 | $ 583,134 | $ (72,918) | $ 42,962 | $ 45,887 | $ 377,043 | $ 282,906 | $ 762,405 | $ 748,798 | $ 227,364
Less: equity in net income of subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |
Net realized and unrealized (gains) losses on investments | (258,745) | $ (224,208) | $ (448,390) | 110,707 | (18,454) | $ (34,394) | $ (191,248) | (170,013) | (820,636) | (414,109) | 183,168
Other |  |  |  |  |  |  |  |  | 178,314 | 238,756 | (223,070)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 1,992,735 | 2,137,195 | 1,221,701
Cash flows used in investing activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from maturities and sales of fixed maturity investments trading |  |  |  |  |  |  |  |  | 15,186,952 | 17,313,940 | 11,585,576
Purchases of fixed maturity investments trading |  |  |  |  |  |  |  |  | (16,836,538) | (17,919,343) | (12,489,972)
Net purchases of short term investments |  |  |  |  |  |  |  |  | (581,473) | (1,900,741) | (1,436,389)
Dividends and return of capital from subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net cash used in investing activities |  |  |  |  |  |  |  |  | (2,304,689) | (2,988,644) | (2,536,613)
Cash flows provided by financing activities |  |  |  |  |  |  |  |  |  |  |
Dividends paid – RenaissanceRe common shares |  |  |  |  |  |  |  |  | (68,490) | (59,368) | (52,841)
Dividends paid – preference shares |  |  |  |  |  |  |  |  | (30,923) | (36,756) | (30,088)
Issuance of debt, net of expenses |  |  |  |  |  |  |  |  | 0 | 396,411 | 0
RenaissanceRe common share repurchases |  |  |  |  |  |  |  |  | (62,621) | 0 | 0
RenaissanceRe common share issuance |  |  |  |  |  |  |  |  | 1,095,507 | 0 | 250,000
Redemption of preference shares |  |  |  |  |  |  |  |  | (125,000) | 0 | 0
Issuance of preference shares, net of expenses |  |  |  |  |  |  |  |  | 0 | 0 | 241,448
Taxes paid on withholding shares |  |  |  |  |  |  |  |  | (12,330) | (7,253) | (7,862)
Net cash provided by financing activities |  |  |  |  |  |  |  |  | 665,214 | 1,120,117 | 1,066,340
Effect of exchange rate changes on foreign currency cash |  |  |  |  |  |  |  |  | 4,485 | 2,478 | (5,098)
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 357,745 | 271,146 | (253,670)
Cash and cash equivalents, beginning of year |  |  |  | 1,379,068 |  |  |  | 1,107,922 | 1,379,068 | 1,107,922 | 1,361,592
Cash and cash equivalents, end of year | 1,736,813 |  |  |  | 1,379,068 |  |  |  | 1,736,813 | 1,379,068 | 1,107,922
Parent Company |  |  |  |  |  |  |  |  |  |  |
Cash flows (used in) provided by operating activities |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to RenaissanceRe |  |  |  |  |  |  |  |  | 762,405 | 748,798 | 227,364
Less: equity in net income of subsidiaries |  |  |  |  |  |  |  |  | (786,552) | (773,419) | (240,495)
Loss before equity in net income of subsidiaries |  |  |  |  |  |  |  |  | (24,147) | (24,621) | (13,131)
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |
Net realized and unrealized (gains) losses on investments |  |  |  |  |  |  |  |  | 4,556 | (12,393) | (633)
Other |  |  |  |  |  |  |  |  | 37,782 | 34,153 | 30,951
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 18,191 | (2,861) | 17,187
Cash flows used in investing activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from maturities and sales of fixed maturity investments trading |  |  |  |  |  |  |  |  | 370,905 | 306,579 | 384,818
Purchases of fixed maturity investments trading |  |  |  |  |  |  |  |  | (384,415) | (66,740) | (520,935)
Net purchases of short term investments |  |  |  |  |  |  |  |  | 64,209 | (116,499) | 48,600
Dividends and return of capital from subsidiaries |  |  |  |  |  |  |  |  | 827,626 | 1,400,944 | 672,098
Contributions to subsidiaries |  |  |  |  |  |  |  |  | (1,623,708) | (1,165,607) | (785,785)
Due (to) from subsidiary |  |  |  |  |  |  |  |  | (65,438) | (625,924) | (227,762)
Net cash used in investing activities |  |  |  |  |  |  |  |  | (810,821) | (267,247) | (428,966)
Cash flows provided by financing activities |  |  |  |  |  |  |  |  |  |  |
Dividends paid – RenaissanceRe common shares |  |  |  |  |  |  |  |  | (68,490) | (59,368) | (52,841)
Dividends paid – preference shares |  |  |  |  |  |  |  |  | (30,923) | (36,756) | (30,088)
Issuance of debt, net of expenses |  |  |  |  |  |  |  |  | 0 | 396,411 | 0
RenaissanceRe common share repurchases |  |  |  |  |  |  |  |  | (62,621) | 0 | 0
RenaissanceRe common share issuance |  |  |  |  |  |  |  |  | 1,095,507 | 0 | 250,000
Redemption of preference shares |  |  |  |  |  |  |  |  | (125,000) | 0 | 0
Issuance of preference shares, net of expenses |  |  |  |  |  |  |  |  | 0 | 0 | 241,448
Taxes paid on withholding shares |  |  |  |  |  |  |  |  | (12,330) | (7,253) | (7,862)
Net cash provided by financing activities |  |  |  |  |  |  |  |  | 796,143 | 293,034 | 400,657
Effect of exchange rate changes on foreign currency cash |  |  |  |  |  |  |  |  | (143) | 0 | 0
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 3,370 | 22,926 | (11,122)
Cash and cash equivalents, beginning of year |  |  |  | $ 26,460 |  |  |  | $ 3,534 | 26,460 | 3,534 | 14,656
Cash and cash equivalents, end of year | $ 29,830 |  |  |  | $ 26,460 |  |  |  | $ 29,830 | $ 26,460 | $ 3,534

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- Definition The cash outflow to reacquire preferred stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash outflow to acquire securities classified as trading securities and held for investment purposes. Excludes payments for trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale, maturities, repayments and calls of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
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