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Reserve For Losses, LAE And Future Policy Benefit Reserve (Ultimate Loss and ALAE And Paid Loss And ALAE, Net Of Reinsurance) (Details) $ in Thousands | Dec. 31, 2021 USD ($) Item | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($)
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Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | $ 16,785,529 |  |  |  |  |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 12,499,575 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 5,261,006 |  |  |  |  |  |  |  |  |
All outstanding liabilities prior to 2012, net of reinsurance | 824,128 |  |  |  |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 8,062,697 |  |  |  |  |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2012 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 626,752 | $ 635,281 | $ 656,696 | $ 682,447 | $ 677,924 | $ 676,252 | $ 692,497 | $ 707,089 | $ 806,271 | $ 913,235
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 22,382 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 568,922 | 549,564 | 539,251 | 504,848 | 425,397 | 355,728 | 275,548 | 179,993 | 98,010 | 41,756
Reinsurance [Member] | Casualty Business [Member] | 2013 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 710,499 | 715,519 | 715,578 | 735,487 | 764,362 | 794,549 | 804,255 | 816,634 | 726,240 |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 21,566 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 603,638 | 574,706 | 548,578 | 496,373 | 389,143 | 314,826 | 214,769 | 123,813 | 49,581 |
Reinsurance [Member] | Casualty Business [Member] | 2014 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 745,601 | 747,748 | 734,567 | 757,392 | 798,868 | 822,646 | 815,861 | 776,680 |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 31,868 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 594,417 | 553,006 | 507,146 | 430,751 | 304,645 | 214,072 | 122,673 | 57,942 |  |
Reinsurance [Member] | Casualty Business [Member] | 2015 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 849,230 | 848,989 | 812,346 | 828,634 | 831,492 | 836,303 | 795,662 |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 75,907 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 621,569 | 573,637 | 503,917 | 413,852 | 267,841 | 160,199 | 57,114 |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2016 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 954,364 | 952,811 | 877,209 | 882,087 | 885,069 | 808,757 |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 129,447 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 629,704 | 548,345 | 433,583 | 326,011 | 190,818 | 90,184 |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2017 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 950,788 | 942,467 | 861,180 | 854,313 | 894,903 |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 199,152 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 592,780 | 464,179 | 322,029 | 188,542 | 81,099 |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2018 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,445,481 | 1,414,891 | 1,337,894 | 1,340,402 |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 466,230 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 638,435 | 463,099 | 290,083 | 154,910 |  |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2019 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,788,763 | 1,786,629 | 1,721,440 |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 907,117 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 526,547 | 343,081 | 210,530 |  |  |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2020 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,914,757 | 1,943,096 |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 1,482,711 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 268,027 | 190,530 |  |  |  |  |  |  |  |
Reinsurance [Member] | Casualty Business [Member] | 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 2,513,341 |  |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 1,951,060 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 216,969 |  |  |  |  |  |  |  |  |
Reinsurance [Member] | Property Business [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 19,028,789 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 14,656,957 |  |  |  |  |  |  |  |  |
All outstanding liabilities prior to 2012, net of reinsurance | 519,855 |  |  |  |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 4,891,687 |  |  |  |  |  |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2012 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,152,601 | 1,154,729 | 1,151,907 | 1,132,514 | 1,144,478 | 1,152,163 | 1,158,272 | 1,159,361 | 1,282,432 | 1,595,581
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 10,597 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 1,106,461 | 1,101,861 | 1,092,694 | 1,069,836 | 1,058,690 | 1,024,725 | 990,221 | 896,790 | 703,440 | 404,621
Reinsurance [Member] | Property Business [Member] | 2013 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 782,285 | 782,978 | 784,582 | 777,334 | 781,908 | 787,484 | 843,829 | 954,434 | 1,302,966 |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 2,615 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 762,225 | 761,755 | 760,516 | 751,190 | 741,032 | 720,662 | 663,255 | 530,340 | 384,956 |
Reinsurance [Member] | Property Business [Member] | 2014 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 956,892 | 956,387 | 964,131 | 963,168 | 963,339 | 1,055,896 | 1,207,588 | 1,366,519 |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 5,114 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 931,494 | 928,821 | 921,984 | 911,719 | 882,489 | 805,888 | 670,226 | 378,154 |  |
Reinsurance [Member] | Property Business [Member] | 2015 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 967,102 | 965,298 | 973,022 | 970,290 | 996,351 | 1,072,514 | 1,408,609 |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 6,102 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 937,534 | 926,506 | 904,827 | 875,529 | 787,370 | 626,200 | 386,340 |  |  |
Reinsurance [Member] | Property Business [Member] | 2016 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,568,689 | 1,567,764 | 1,590,207 | 1,596,178 | 1,560,324 | 1,725,574 |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 19,440 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 1,539,568 | 1,520,320 | 1,460,922 | 1,336,301 | 1,035,935 | 489,865 |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2017 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 3,707,890 | 3,662,032 | 3,533,258 | 3,422,515 | 2,799,762 |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 9,592 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 3,477,657 | 3,259,500 | 2,858,044 | 2,277,663 | 850,375 |  |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2018 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 2,465,788 | 2,527,900 | 2,526,001 | 2,650,359 |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 40,866 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 2,125,022 | 1,941,282 | 1,563,718 | 558,319 |  |  |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2019 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 2,098,665 | 2,153,458 | 2,122,117 |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 176,930 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 1,703,956 | 1,365,923 | 769,261 |  |  |  |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2020 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 2,526,034 | 2,453,269 |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 616,803 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 1,385,266 | 606,518 |  |  |  |  |  |  |  |
Reinsurance [Member] | Property Business [Member] | 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 2,802,843 |  |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 1,445,812 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 687,773 |  |  |  |  |  |  |  |  |
Insurance [Member] | Casualty Business [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 6,663,437 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 3,505,299 |  |  |  |  |  |  |  |  |
All outstanding liabilities prior to 2012, net of reinsurance | 226,081 |  |  |  |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 3,384,219 |  |  |  |  |  |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2012 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 354,697 | 353,942 | 351,441 | 346,980 | 344,007 | 353,394 | 348,260 | 347,065 | 351,526 | 349,721
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 31,942 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 15,782 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 317,249 | 311,863 | 306,934 | 294,442 | 272,113 | 246,454 | 213,488 | 157,924 | 101,300 | 33,194
Insurance [Member] | Casualty Business [Member] | 2013 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 350,107 | 349,965 | 350,927 | 344,479 | 351,380 | 393,129 | 392,955 | 393,519 | 393,689 |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 29,280 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 21,360 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 317,111 | 310,927 | 303,784 | 285,872 | 260,222 | 224,633 | 176,326 | 117,046 | 33,314 |
Insurance [Member] | Casualty Business [Member] | 2014 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 397,889 | 399,021 | 398,126 | 397,307 | 460,862 | 454,801 | 457,270 | 431,297 |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 44,649 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 25,265 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 350,976 | 339,484 | 326,008 | 297,760 | 256,885 | 201,688 | 124,936 | 41,194 |  |
Insurance [Member] | Casualty Business [Member] | 2015 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 472,700 | 472,079 | 469,081 | 542,637 | 536,106 | 528,468 | 519,869 |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 56,840 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 27,044 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 414,069 | 382,743 | 353,440 | 292,111 | 218,987 | 134,760 | 44,317 |  |  |
Insurance [Member] | Casualty Business [Member] | 2016 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 542,750 | 554,151 | 616,641 | 581,114 | 552,057 | 554,134 |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 86,737 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 31,674 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 445,429 | 402,518 | 342,880 | 269,127 | 164,357 | 54,740 |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2017 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 635,622 | 659,359 | 627,426 | 604,615 | 614,528 |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 156,575 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 35,627 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 457,197 | 381,169 | 281,339 | 172,415 | 53,918 |  |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2018 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 766,992 | 752,894 | 714,065 | 708,122 |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 193,686 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 36,041 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 447,358 | 319,559 | 208,432 | 63,587 |  |  |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2019 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 888,280 | 855,266 | 852,407 |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 288,688 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 39,219 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 398,600 | 234,915 | 72,394 |  |  |  |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2020 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,058,272 | 997,126 |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 620,239 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 34,983 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 248,000 | 79,658 |  |  |  |  |  |  |  |
Insurance [Member] | Casualty Business [Member] | 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 1,196,128 |  |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | $ 782,844 |  |  |  |  |  |  |  |  |
Cumulative Number of Reported Claims | Item | 31,679 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 109,311 |  |  |  |  |  |  |  |  |
Insurance [Member] | Property Business [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 3,155,364 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 2,708,995 |  |  |  |  |  |  |  |  |
All outstanding liabilities prior to 2012, net of reinsurance | 557 |  |  |  |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 446,926 |  |  |  |  |  |  |  |  |
Insurance [Member] | Property Business [Member] | 2012 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 82,685 | 82,613 | 82,552 | 82,005 | 81,828 | 82,045 | 82,475 | 81,773 | 89,038 | 106,363
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 5 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 82,669 | 82,612 | 82,483 | 81,846 | 81,708 | 81,917 | 81,776 | 80,495 | 81,798 | $ 56,506
Insurance [Member] | Property Business [Member] | 2013 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 92,035 | 91,893 | 92,326 | 92,472 | 92,311 | 92,222 | 91,334 | 98,203 | 112,082 |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 94 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 91,942 | 91,864 | 91,855 | 91,838 | 91,798 | 92,189 | 91,919 | 93,179 | $ 68,711 |
Insurance [Member] | Property Business [Member] | 2014 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 119,428 | 119,138 | 119,481 | 119,344 | 119,523 | 119,989 | 123,744 | 131,752 |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 49 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 118,808 | 118,799 | 118,724 | 118,605 | 118,270 | 118,277 | 116,089 | $ 81,853 |  |
Insurance [Member] | Property Business [Member] | 2015 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 146,559 | 146,626 | 144,919 | 146,930 | 144,081 | 153,028 | 173,059 |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 47 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 147,052 | 146,954 | 146,866 | 145,367 | 142,560 | 141,394 | $ 102,239 |  |  |
Insurance [Member] | Property Business [Member] | 2016 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 297,417 | 295,140 | 292,750 | 280,797 | 275,740 | 291,182 |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 380 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 294,031 | 293,247 | 290,278 | 272,535 | 250,034 | $ 162,906 |  |  |  |
Insurance [Member] | Property Business [Member] | 2017 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 493,370 | 499,323 | 496,195 | 502,601 | 498,044 |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 480 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 486,538 | 482,817 | 460,130 | 425,384 | $ 179,403 |  |  |  |  |
Insurance [Member] | Property Business [Member] | 2018 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 411,160 | 398,243 | 403,013 | 409,168 |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 693 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 404,819 | 379,654 | 359,276 | $ 245,840 |  |  |  |  |  |
Insurance [Member] | Property Business [Member] | 2019 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 355,692 | 351,599 | 349,061 |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 5,808 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 339,411 | 317,766 | $ 227,630 |  |  |  |  |  |  |
Insurance [Member] | Property Business [Member] | 2020 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 507,281 | 599,613 |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 45,162 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | 415,518 | $ 293,331 |  |  |  |  |  |  |  |
Insurance [Member] | Property Business [Member] | 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance | 649,738 |  |  |  |  |  |  |  |  |
Total of IBNR Liabilities Plus Expected Development on Reported Claims | 191,897 |  |  |  |  |  |  |  |  |
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance | $ 328,207 |  |  |  |  |  |  |  |  |

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