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Acquisition of Tokio Millennium Re (Schedule of Fair Value of Net Assets Acquired and Liabilities Assumed) (Details) - TMR - USD ($) $ in Thousands | Mar. 22, 2019 | Dec. 31, 2020
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Business Acquisition [Line Items] |  |
Shareholders’ equity of TMR at March 22, 2019 | $ 1,032,961 |
Adjustments for fair value, by applicable balance sheet caption: |  |
Net deferred acquisition costs and value of business acquired | (56,788) |
Net reserve for claims and claim expenses | 67,782 |
Goodwill and intangible assets at March 22, 2019 of TMR | (6,569) |
Total adjustments for fair value by applicable balance sheet caption before tax impact | 4,425 |
Other assets - net deferred tax liability related to fair value adjustments and value of business acquired | (2,606) |
Total adjustments for fair value by applicable balance sheet caption, net of tax | 1,819 |
Adjustments for fair value of the identifiable intangible assets: |  |
Identifiable intangible assets before tax impact | 18,000 | $ 9,485
Other assets - deferred tax liability on identifiable intangible assets | (2,281) |
Total adjustments for fair value of the identifiable intangible assets and value of business acquired, net of tax | 15,719 |
Total adjustments for fair value by applicable balance sheet caption, identifiable intangible assets and value of business acquired, net of tax | 17,538 |
Shareholders’ equity of TMR at fair value | 1,050,499 |
Total net purchase price paid by RenaissanceRe | 1,063,593 |
Excess purchase price over the fair value of net assets acquired assigned to goodwill | 13,094 |
Insurance licenses |  |
Adjustments for fair value of the identifiable intangible assets: |  |
Identifiable indefinite lived intangible assets (insurance licenses) | 6,800 |
Top Broker Relationships and Renewal Rights |  |
Adjustments for fair value of the identifiable intangible assets: |  |
Identifiable finite lived intangible assets (top broker relationships and renewal rights) | $ 11,200 |

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