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Schedule II - Condensed Financial Information Of The Registrant (Condensed 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
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 63,601 | $ 243,057 | $ 190,880 | $ 16,612 | $ 217,644 | $ 104,398 | $ 332,868 | $ 354,551 | $ 514,151 | $ 1,009,461 | $ 89,041
Change in other assets and liabilities, net |  |  |  |  |  |  |  |  | (95,968) | (54,176) | (322,107)
Amortization of bond premium (accrual of bond discount) |  |  |  |  |  |  |  |  | 49,673 | 30,936 | 29,272
Realized capital losses (gains) | (183,386) | $ (110,203) | $ (184,648) | 210,588 | (75,443) | $ 12,943 | $ (30,272) | (92,232) | (267,649) | (185,004) | 127,136
Non-cash compensation expense |  |  |  |  |  |  |  |  | 39,209 | 34,018 | 32,369
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 2,873,579 | 1,852,002 | 610,069
Proceeds from fixed maturities sold - available for sale, at market value |  |  |  |  |  |  |  |  | 1,945,867 | 3,280,237 | 3,148,428
Distributions from other invested assets |  |  |  |  |  |  |  |  | 309,912 | 284,558 | 3,102,018
Cost of fixed maturities acquired - available for sale, at market value |  |  |  |  |  |  |  |  | (7,189,301) | (6,613,917) | (5,909,504)
Cost of other invested assets acquired |  |  |  |  |  |  |  |  | (557,473) | (425,438) | (3,370,455)
Net change in short-term investments |  |  |  |  |  |  |  |  | (717,527) | (167,290) | 455,350
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | (3,683,371) | (1,412,492) | (279,621)
Purchase of treasury shares |  |  |  |  |  |  |  |  | (200,020) | (24,604) | (75,304)
Dividends paid to shareholders |  |  |  |  |  |  |  |  | (249,097) | (234,322) | (216,221)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | 800,220 | (275,687) | (316,594)
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 514,151 | 1,009,461 | 89,041
Equity in retained (earnings) deficit of subsidiaries |  |  |  |  |  |  |  |  | (535,866) | (1,026,233) | (112,859)
Change in other assets and liabilities, net |  |  |  |  |  |  |  |  | (21,145) | 564 | 4,824
Increase (decrease) in due to/from affiliate |  |  |  |  |  |  |  |  | (8,621) | (2,209) | 683
Amortization of bond premium (accrual of bond discount) |  |  |  |  |  |  |  |  | (14) | (9) | (577)
Realized capital losses (gains) |  |  |  |  |  |  |  |  | (28) | 66 | 57
Non-cash compensation expense |  |  |  |  |  |  |  |  | 2,588 | 2,796 | 2,740
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 601,065 | 584,436 | 933,909
Additional investment in subsidiaries |  |  |  |  |  |  |  |  | (138,320) | (478,125) | (542,965)
Proceeds from fixed maturities matured/called - available for sale, at market value |  |  |  |  |  |  |  |  | 1,356 | 63 | 93
Proceeds from fixed maturities sold - available for sale, at market value |  |  |  |  |  |  |  |  | 200,264 | 74,841 | 24,856
Distributions from other invested assets |  |  |  |  |  |  |  |  | 559,767 | 644,918 | 1,026,297
Cost of fixed maturities acquired - available for sale, at market value |  |  |  |  |  |  |  |  |  | (200,267) |
Cost of other invested assets acquired |  |  |  |  |  |  |  |  | (800,828) | (686,528) | (923,828)
Net change in short-term investments |  |  |  |  |  |  |  |  |  |  |
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | (177,761) | (645,098) | (415,547)
Common shares issued during the period, net |  |  |  |  |  |  |  |  | 23,185 | 22,861 | 20,086
Purchase of treasury shares |  |  |  |  |  |  |  |  | (200,020) | (24,604) | (75,304)
Dividends paid to shareholders |  |  |  |  |  |  |  |  | (249,056) | (234,322) | (216,221)
Proceeds from issuance (cost or repayment) of long term note - affiliated |  |  |  |  |  |  |  |  |  | 300,000 | (250,000)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | (425,891) | 63,935 | (521,439)
EFFECT OF EXCHANGE RATE CHANGES ON CASH |  |  |  |  |  |  |  |  |  |  |
Net increase (decrease) in cash |  |  |  |  |  |  |  |  | (2,587) | 3,273 | (3,077)
Cash, beginning of period |  |  |  | $ 3,471 |  |  |  | $ 198 | 3,471 | 198 | 3,275
Cash, end of period | $ 884 |  |  |  | $ 3,471 |  |  |  | 884 | 3,471 | 198
Parent Company [Member] | Everest International [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries |  |  |  |  |  |  |  |  |  |  | 200,000
Parent Company [Member] | Mt Logan Re [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries |  |  |  |  |  |  |  |  |  |  |
Bermuda Re [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries |  |  |  |  |  |  |  |  | $ 650,000 | $ 600,000 | $ 750,000

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