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Schedule II - Condensed Financial Information Of The Registrant (Narrative) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Aug. 05, 2021 | Dec. 17, 2019
Debt Instrument [Line Items] |  |  |  |  |
Other assets | $ 757,167,000 | $ 665,515,000 |  |  |
Other income (expense) | 36,987,000 | 6,487,000 | $ (4,660,000) |  |
Mt. Logan Re Segregated Accounts [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other assets | 66,300,000 | 67,600,000 |  |  |
Other income (expense) | 1,300,000 | 6,300,000 | (800,000) |  |
Parent Company [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other assets | 50,061,000 | 64,692,000 |  |  |
Other income (expense) | $ (185,000) | $ 5,833,000 | $ 458,000 |  |
Parent Company [Member] | Notes Payable Other Payables [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument face amount |  |  |  | $ 200,000,000 | $ 300,000,000
Maturity Date | Dec. 01, 2028 |  |  |  |
Debt instrument, stated interest rate |  |  |  | 1.00% | 1.69%

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