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Collateralized Reinsurance And Trust Agreements (Schedule of Proceeds from Issuance of Notes Held in Reinsurance Trusts) (Details) - Kilimanjaro Re Limited [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($)
Effects of Reinsurance [Line Items] |
Amount | $ 2,325,000
Series 2017-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 13, 2017
Maturity Date | Apr. 13, 2022
Amount | $ 50,000
Series 2017-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 13, 2017
Maturity Date | Apr. 13, 2022
Amount | $ 75,000
Series 2017-1 Class C-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 13, 2017
Maturity Date | Apr. 13, 2022
Amount | $ 175,000
Series 2018-1 Class A-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 06, 2022
Amount | $ 62,500
Series 2018-1 Class B-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 06, 2022
Amount | $ 200,000
Series 2018-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 05, 2023
Amount | $ 62,500
Series 2018-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 05, 2023
Amount | $ 200,000
Series 2019-1 Class A-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2023
Amount | $ 150,000
Series 2019-1 Class B-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2023
Amount | $ 275,000
Series 2019-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2024
Amount | $ 150,000
Series 2019-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2024
Amount | $ 275,000
Series 2021-1 Class A-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 150,000
Series 2021-1 Class B-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 85,000
Series 2021-1 Class C-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 85,000
Series 2021-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 150,000
Series 2021-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 90,000
Series 2021-1 Class C-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 90,000

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