Biggest changeAnalysis of Loss and Loss Adjustment Expense Reserve Development Year Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 (in thousands) Reserve for loss and loss adjustment expenses, net of reinsurance recoverables $ 515,260 $ 565,858 $ 628,268 $ 653,175 $ 664,520 $ 686,956 $ 691,193 $ 677,544 $ 654,854 $ 626,012 $ 583,482 Net reserve estimated as of: One year later 502,648 542,141 580,454 601,868 629,750 641,360 626,192 614,060 592,937 585,421 Two years later 478,931 494,327 529,149 567,098 584,149 576,358 562,709 552,143 552,345 Three years later 439,272 462,770 504,437 530,582 528,659 527,722 514,889 517,763 Four years later 420,913 452,097 484,964 498,494 494,513 498,173 493,631 Five years later 415,996 440,750 467,382 473,137 473,097 485,768 Six years later 408,762 431,715 451,232 458,115 464,296 Seven years later 401,130 421,534 440,039 450,531 Eight years later 392,829 411,947 433,298 Nine years later 385,125 405,921 Ten years later 380,494 Net cumulative redundancy $ 134,766 $ 159,937 $ 194,970 $ 202,644 $ 200,224 $ 201,188 $ 197,562 $ 159,781 $ 102,508 $ 40,591 Cumulative amount of reserve paid, net of reserve recoveries, through: One year later 127,205 129,658 135,711 135,601 129,937 138,593 131,108 129,803 137,348 143,892 Two years later 188,752 198,610 203,855 202,063 202,928 205,705 199,284 207,382 203,243 Three years later 226,907 233,254 240,098 247,751 241,165 247,609 242,983 245,749 Four years later 245,860 253,081 267,143 272,144 268,049 271,213 267,293 Five years later 259,202 269,179 279,944 289,001 282,368 286,865 Six years later 270,055 276,534 293,197 298,074 290,057 Seven years later 274,520 284,522 299,782 303,762 Eight years later 280,657 290,332 304,276 Nine years later 285,567 293,803 Ten years later 287,903 Net reserve— December 31 $ 515,260 $ 565,858 $ 628,268 $ 653,175 $ 664,520 $ 686,956 $ 691,193 $ 677,544 $ 654,854 $ 626,012 $ 583,482 Reinsurance recoverables 55,190 48,699 59,334 64,858 78,256 84,889 107,216 95,343 105,707 119,266 112,555 Gross reserve— December 31 $ 570,450 $ 614,557 $ 687,602 $ 718,033 $ 742,776 $ 771,845 $ 798,409 $ 772,887 $ 760,561 $ 745,278 $ 696,037 Net re-estimated reserve $ 380,494 $ 405,921 $ 433,298 $ 450,531 $ 464,296 $ 485,768 $ 493,631 $ 517,763 $ 552,345 $ 585,421 Re-estimated reinsurance recoverables 38,692 41,507 49,045 49,598 55,832 67,502 69,033 82,579 88,418 109,676 Gross re-estimated reserve $ 419,186 $ 447,428 $ 482,343 $ 500,129 $ 520,128 $ 553,270 $ 562,664 $ 600,342 $ 640,763 $ 695,097 Gross cumulative redundancy (deficiency) $ 151,264 $ 167,129 $ 205,259 $ 217,904 $ 222,648 $ 218,575 $ 235,745 $ 172,545 $ 119,798 $ 50,181 Investments We derive net investment income from our invested assets.
Biggest changeA deficiency means that the current estimate is higher than the original estimate. 12 Analysis of Loss and Loss Adjustment Expense Reserve Development Year Ended December 31, 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 (in thousands) Reserve for loss and loss adjustment expenses, net of reinsurance recoverables $ 565,858 $ 628,268 $ 653,175 $ 664,520 $ 686,956 $ 691,193 $ 677,544 $ 654,854 $ 626,012 $ 583,482 $ 554,248 Net reserve estimated as of: One year later 542,141 580,454 601,868 629,750 641,360 626,192 614,060 592,937 585,421 542,086 Two years later 494,327 529,149 567,098 584,149 576,358 562,709 552,143 552,345 544,024 Three years later 462,770 504,437 530,582 528,659 527,722 514,889 517,763 518,432 Four years later 452,097 484,964 498,494 494,513 498,173 493,631 491,301 Five years later 440,750 467,382 473,137 473,097 485,768 475,184 Six years later 431,715 451,232 458,115 464,296 470,837 Seven years later 421,534 440,039 450,531 451,432 Eight years later 411,947 433,298 440,705 Nine years later 405,921 425,002 Ten years later 398,512 Net cumulative redundancy $ 167,346 $ 203,266 $ 212,470 $ 213,088 $ 216,119 $ 216,009 $ 186,243 $ 136,422 $ 81,988 $ 41,396 Cumulative amount of reserve paid, net of reserve recoveries, through: One year later 129,658 135,711 135,601 129,937 138,593 131,108 129,803 137,348 143,892 130,290 Two years later 198,610 203,855 202,063 202,928 205,705 199,284 207,382 203,243 214,641 Three years later 233,254 240,098 247,751 241,165 247,609 242,983 245,749 244,417 Four years later 253,081 267,143 272,144 268,049 271,213 267,293 270,359 Five years later 269,179 279,944 289,001 282,368 286,865 283,863 Six years later 276,534 293,197 298,074 290,057 299,720 Seven years later 284,522 299,782 303,762 300,918 Eight years later 290,332 304,276 310,185 Nine years later 293,803 309,450 Ten years later 296,760 Net reserve— December 31 $ 565,858 $ 628,268 $ 653,175 $ 664,520 $ 686,956 $ 691,193 $ 677,544 $ 654,854 $ 626,012 $ 583,482 $ 554,248 Reinsurance recoverables 48,699 59,334 64,858 78,256 84,889 107,216 95,343 105,707 119,266 112,555 119,746 Gross reserve— December 31 $ 614,557 $ 687,602 $ 718,033 $ 742,776 $ 771,845 $ 798,409 $ 772,887 $ 760,561 $ 745,278 $ 696,037 $ 673,994 Net re-estimated reserve $ 398,512 $ 425,002 $ 440,705 $ 451,432 $ 470,837 $ 475,184 $ 491,301 $ 518,432 $ 544,024 $ 542,086 Re-estimated reinsurance recoverables 38,769 45,816 46,168 51,194 62,864 64,651 77,912 83,149 107,946 110,824 Gross re-estimated reserve $ 437,281 $ 470,818 $ 486,873 $ 502,626 $ 533,701 $ 539,835 $ 569,213 $ 601,581 $ 651,970 $ 652,910 Gross cumulative redundancy (deficiency) $ 177,276 $ 216,784 $ 231,160 $ 240,150 $ 238,144 $ 258,574 $ 203,674 $ 158,980 $ 93,308 $ 43,127 Investments We derive net investment income from our invested assets.
Additional information regarding our reserve for unpaid loss and loss adjustment expenses (LAE) as of December 31, 2022, 2021, and 2020 is set forth below: 2022 2021 2020 (in thousands) Gross case loss and DCC reserves $ 559,570 $ 605,888 $ 610,255 AO reserves 17,589 19,625 22,426 Gross IBNR reserves 118,878 119,765 127,880 Gross unpaid loss, DCC and AO reserves 696,037 745,278 760,561 Reinsurance recoverables on unpaid loss and LAE (112,555 ) (119,266 ) (105,707 ) Net unpaid loss, DCC and AO reserves $ 583,482 $ 626,012 $ 654,854 We performed sensitivity analyses to show how our net loss and DCC expense reserve, including IBNR, would be impacted by changes in certain critical assumptions.
Additional information regarding our reserve for unpaid loss and loss adjustment expenses (LAE) as of December 31, 2023, 2022, and 2021 is set forth below: 2023 2022 2021 (in thousands) Gross case loss and DCC reserves $ 535,116 $ 559,570 $ 605,888 AO reserves 19,117 17,589 19,625 Gross IBNR reserves 119,761 118,878 119,765 Gross unpaid loss, DCC and AO reserves 673,994 696,037 745,278 Reinsurance recoverables on unpaid loss and LAE (119,746 ) (112,555 ) (119,266 ) Net unpaid loss, DCC and AO reserves $ 554,248 $ 583,482 $ 626,012 10 We performed sensitivity analyses to show how our net loss and DCC expense reserve, including IBNR, would be impacted by changes in certain critical assumptions.