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Schedule II - Condensed Financial Information Of The Registrant (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 217,644 | $ 104,398 | $ 332,868 | $ 354,551 | $ (385,313) | $ 198,381 | $ 60,787 | $ 215,186 | $ 687,419 | $ 275,973 | $ 474,354 | $ 1,009,461 | $ 89,041 | $ 482,751
Change in other assets and liabilities, net |  |  |  |  |  |  |  |  |  |  |  | (54,176) | (322,107) | (66,998)
Amortization of bond premium (accrual of bond discount) |  |  |  |  |  |  |  |  |  |  |  | 30,936 | 29,272 | 45,867
Realized capital losses (gains) | (75,443) | $ 12,943 | $ (30,272) | (92,232) | 172,815 | $ (54,804) | $ (15,776) | 24,901 |  |  |  | (185,004) | 127,136 | (153,194)
Non-cash compensation expense |  |  |  |  |  |  |  |  |  |  |  | 34,018 | 32,369 | 30,297
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |  | 1,852,002 | 610,069 | 1,162,693
Proceeds from fixed maturities sold - available for sale, at market value |  |  |  |  |  |  |  |  |  |  |  | 3,280,237 | 3,148,428 | 2,401,844
Distributions from other invested assets |  |  |  |  |  |  |  |  |  |  |  | 284,558 | 3,102,018 | 5,579,043
Cost of fixed maturities acquired - available for sale, at market value |  |  |  |  |  |  |  |  |  |  |  | (6,613,917) | (5,909,504) | (5,131,098)
Cost of other invested assets acquired |  |  |  |  |  |  |  |  |  |  |  | (425,438) | (3,370,455) | (5,829,271)
Net change in short-term investments |  |  |  |  |  |  |  |  |  |  |  | (167,290) | 455,350 | (73,923)
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  |  |  |  | (1,412,492) | (279,621) | (732,577)
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  |  | (24,604) | (75,304) | (50,000)
Dividends paid to shareholders |  |  |  |  |  |  |  |  |  |  |  | (234,322) | (216,221) | (207,242)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | (275,687) | (316,594) | (275,458)
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 1,009,461 | 89,041 | 482,751
Equity in retained (earnings) deficit of subsidiaries |  |  |  |  |  |  |  |  |  |  |  | (1,026,233) | (112,859) | (509,279)
Change in other assets and liabilities, net |  |  |  |  |  |  |  |  |  |  |  | 564 | 4,824 | 6,107
Increase (decrease) in due to/from affiliate |  |  |  |  |  |  |  |  |  |  |  | (2,209) | 683 | (6,470)
Amortization of bond premium (accrual of bond discount) |  |  |  |  |  |  |  |  |  |  |  | (9) | (577) | 12
Realized capital losses (gains) |  |  |  |  |  |  |  |  |  |  |  | 66 | 57 | (80)
Non-cash compensation expense |  |  |  |  |  |  |  |  |  |  |  | 2,796 | 2,740 | 3,448
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |  | 584,436 | 933,909 | 401,489
Additional investment in subsidiaries |  |  |  |  |  |  |  |  |  |  |  | (478,125) | (542,965) | (109,815)
Proceeds from fixed maturities matured/called - available for sale, at market value |  |  |  |  |  |  |  |  |  |  |  | 63 | 93 | 696
Proceeds from fixed maturities sold - available for sale, at market value |  |  |  |  |  |  |  |  |  |  |  | 74,841 | 24,856 | 90,154
Distributions from other invested assets |  |  |  |  |  |  |  |  |  |  |  | (200,267) |  | (189,308)
Cost of fixed maturities acquired - available for sale, at market value |  |  |  |  |  |  |  |  |  |  |  | (686,528) | (923,828) | (503,937)
Cost of other invested assets acquired |  |  |  |  |  |  |  |  |  |  |  | 644,918 | 1,026,297 | 546,414
Net change in short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  |  |  |  | (645,098) | (415,547) | (165,796)
Common shares issued during the period, net |  |  |  |  |  |  |  |  |  |  |  | 22,861 | 20,086 | 22,790
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  |  | (24,604) | (75,304) | (50,000)
Dividends paid to shareholders |  |  |  |  |  |  |  |  |  |  |  | (234,322) | (216,221) | (207,242)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | 63,935 | (521,439) | (234,452)
EFFECT OF EXCHANGE RATE CHANGES ON CASH |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net increase (decrease) in cash |  |  |  |  |  |  |  |  |  |  |  | 3,273 | (3,077) | 1,241
Cash, beginning of period |  |  |  | $ 198 |  |  |  | $ 3,275 | $ 198 | $ 3,275 | $ 3,275 | 198 | 3,275 | 2,034
Cash, end of period | $ 3,471 |  |  |  | $ 198 |  |  |  |  |  |  | 3,471 | 198 | 3,275
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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000
Bermuda Re [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 | $ 750,000 | $ 400,000

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