XML 159 R135.htm IDEA: XBRL DOCUMENT v3.24.0.1
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Supplementary Insurance Information [Line Items]      
Deferred acquisition costs $ 450,950 $ 473,569 $ 465,593
Reserve for losses and loss expenses 16,434,018 15,168,863 14,653,094
Unearned premiums 4,747,602 4,361,447 4,090,676
Net premiums earned 5,083,781 5,160,326 4,709,850
Net investment income 611,742 418,829 454,301
Net losses and loss expenses 3,393,102 3,242,410 3,008,783
Acquisition costs 1,000,945 1,022,017 921,834
Other operating expenses 684,446 680,343 663,304
Net premiums written 5,102,325 5,263,056 4,926,624
Operating Segments | Insurance      
Supplementary Insurance Information [Line Items]      
Deferred acquisition costs 298,249 249,407 212,681
Reserve for losses and loss expenses 9,507,409 8,381,593 7,803,529
Unearned premiums 3,507,519 3,077,628 2,716,240
Net premiums earned 3,461,700 3,134,155 2,651,339
Net investment income 0 0 0
Net losses and loss expenses 2,080,001 1,785,854 1,514,998
Acquisition costs 648,463 577,838 484,344
Other operating expenses 472,094 443,704 429,282
Net premiums written 3,758,720 3,377,906 2,894,885
Operating Segments | Reinsurance      
Supplementary Insurance Information [Line Items]      
Deferred acquisition costs 152,701 224,162 252,912
Reserve for losses and loss expenses 6,926,609 6,787,270 6,849,565
Unearned premiums 1,240,083 1,283,819 1,374,436
Net premiums earned 1,622,081 2,026,171 2,058,511
Net investment income 0 0 0
Net losses and loss expenses 1,313,101 1,456,556 1,493,785
Acquisition costs 352,482 444,179 437,490
Other operating expenses 79,373 106,585 107,552
Net premiums written 1,343,605 1,885,150 2,031,739
Corporate      
Supplementary Insurance Information [Line Items]      
Deferred acquisition costs 0 0 0
Reserve for losses and loss expenses 0 0 0
Unearned premiums 0 0 0
Net premiums earned 0 0 0
Net investment income 611,742 418,829 454,301
Net losses and loss expenses 0 0 0
Acquisition costs 0 0 0
Other operating expenses 132,979 130,054 126,470
Net premiums written $ 0 $ 0 $ 0