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REINSURANCE - Schedule of Effect of Reinsurance and Retrocessional Activity on Premiums Written and Earned and on Net Claims and Claim Expenses Incurred (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Premiums Written |  |  |
Direct | $ 1,197,360 | $ 865,771 | $ 1,264,410
Assumed | 10,535,706 | 7,996,595 | 7,949,130
Ceded | (1,780,850) | (1,394,553) | (2,017,380)
Net premiums written | 9,952,216 | 7,467,813 | 7,196,160
Premiums Earned |  |  |
Direct | 1,097,726 | 1,013,372 | 1,105,164
Assumed | 10,815,336 | 8,072,193 | 7,079,632
Ceded | (1,817,302) | (1,614,432) | (1,850,807)
Net premiums earned (Note 7) | 10,095,760 | 7,471,133 | 6,333,989
Claims and Claim Expenses |  |  |
Gross claims and claim expenses incurred | 5,629,756 | 3,950,362 | 5,851,140
Claims and claim expenses recovered | (296,775) | (376,853) | (1,512,300)
Net claims and claim expenses incurred | $ 5,332,981 | $ 3,573,509 | $ 4,338,840

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