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Schedule IV - Reinsurance (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 5,034,952 | $ 4,386,556 | $ 3,880,522
Ceded to Other Companies | 684,955 | 583,977 | 537,884
Assumed from Other Companies | 26,450 | 25,027 | 30,742
Net | $ 4,376,447 | $ 3,827,606 | $ 3,373,380
% of Amount Assumed to Net | 1.00% | 1.00% | 1.00%
Accident and health insurance |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 0 | $ 0 | $ 0
Ceded to Other Companies | 0 | 0 | 0
Assumed from Other Companies | 0 | 0 | 0
Net | $ 0 | $ 0 | $ 0
% of Amount Assumed to Net | 0.00% | 0.00% | 0.00%
Property and liability insurance |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 5,034,952 | $ 4,386,556 | $ 3,880,522
Ceded to Other Companies | 684,955 | 583,977 | 537,884
Assumed from Other Companies | 26,450 | 25,027 | 30,742
Net | $ 4,376,447 | $ 3,827,606 | $ 3,373,380
% of Amount Assumed to Net | 1.00% | 1.00% | 1.00%

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