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Collateralized Reinsurance And Trust Agreements (Premiums And Losses Ceded By The Company To Affiliate) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Effects of Reinsurance [Line Items] |  |  |  |
Ceded written premiums | $ 58,887 | $ 46,641 | $ 140,450 | $ 130,430
Ceded earned premiums | 74,315 | 65,957 | 140,640 | 126,838
Ceded losses and LAE | 39,366 | 135,299 | 85,415 | 160,523
Assumed written premiums | 2,724 | 1,604 | 5,033 | 4,647
Assumed earned premiums | 2,724 | 1,604 | 5,033 | 4,647
Assumed losses and LAE | $ 0 | $ 0 | $ 0 | $ 0

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