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SEGMENT REPORTING (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Segment Reporting Information [Line Items] |  |  |  |
Gross premiums written | $ 2,651,621 | $ 2,464,639 | $ 5,441,882 | $ 5,407,603
Net premiums written | 2,195,803 | 1,863,616 | 4,459,506 | 4,028,833
Net premiums earned | 1,785,262 | 1,456,383 | 3,465,812 | 2,942,808
Net claims and claim expenses incurred | 931,211 | 706,239 | 1,732,411 | 1,547,972
Acquisition expenses | 422,545 | 361,238 | 854,802 | 737,745
Operational expenses | 80,491 | 72,520 | 157,965 | 140,427
Underwriting income (loss) | 351,015 | 316,386 | 720,634 | 516,664
Net investment income | 292,662 | 107,211 | 547,040 | 190,902
Net foreign exchange gains (losses) | (13,488) | (50,821) | (27,991) | (66,307)
Equity in earnings of other ventures | 7,700 | 7,383 | 17,230 | 993
Other income (loss) | 3,876 | 923 | (430) | 2,116
Net realized and unrealized gains (losses) on investments | (222,781) | (654,107) | 56,670 | (1,327,124)
Corporate expenses | (23,371) | (12,352) | (36,214) | (24,854)
Interest expense | (14,895) | (11,895) | (27,029) | (23,850)
Income (loss) before taxes | 380,718 | (297,272) | 1,249,910 | (731,460)
Income tax benefit (expense) | (5,942) | 30,534 | (34,844) | 67,241
Net (income) loss attributable to redeemable noncontrolling interests | (174,907) | (49,331) | (442,291) | (37,419)
Dividends on preference shares | (8,844) | (8,844) | (17,688) | (17,688)
Net income (loss) available (attributable) to RenaissanceRe common shareholders | 191,025 | (324,913) | 755,087 | (719,326)
Net claims and claim expenses incurred – current accident year | 963,309 | 749,196 | 1,869,261 | 1,608,762
Net claims and claim expenses incurred – prior accident years | (32,098) | (42,957) | (136,850) | (60,790)
Total net incurred | $ 931,211 | $ 706,239 | $ 1,732,411 | $ 1,547,972
Net claims and claim expense ratio – current accident year | 54.00% | 51.40% | 53.90% | 54.70%
Net claims and claim expense ratio – prior accident years | (1.80%) | (2.90%) | (3.90%) | (2.10%)
Net claims and claim expense ratio – calendar year | 52.20% | 48.50% | 50.00% | 52.60%
Underwriting expense ratio | 28.10% | 29.80% | 29.20% | 29.80%
Combined ratio | 80.30% | 78.30% | 79.20% | 82.40%
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross premiums written | $ 0 | $ 0 | $ 0 | $ 0
Net premiums written | 0 | 0 | 0 | 0
Net premiums earned | 0 | 0 | 0 | 0
Net claims and claim expenses incurred | 0 | 0 | 0 | 0
Acquisition expenses | 0 | 0 | 0 | 0
Operational expenses | 0 | 0 | 0 | 0
Underwriting income (loss) | 0 | 0 | 0 | 0
Net investment income | 292,662 | 107,211 | 547,040 | 190,902
Net foreign exchange gains (losses) | (13,488) | (50,821) | (27,991) | (66,307)
Equity in earnings of other ventures | 7,700 | 7,383 | 17,230 | 993
Other income (loss) | 3,876 | 923 | (430) | 2,116
Net realized and unrealized gains (losses) on investments | (222,781) | (654,107) | 56,670 | (1,327,124)
Corporate expenses | (23,371) | (12,352) | (36,214) | (24,854)
Interest expense | (14,895) | (11,895) | (27,029) | (23,850)
Income tax benefit (expense) | (5,942) | 30,534 | (34,844) | 67,241
Net (income) loss attributable to redeemable noncontrolling interests | (174,907) | (49,331) | (442,291) | (37,419)
Dividends on preference shares | (8,844) | (8,844) | (17,688) | (17,688)
Net claims and claim expenses incurred – current accident year | 0 | 0 | 0 | 0
Net claims and claim expenses incurred – prior accident years | 0 | 0 | 0 | 0
Total net incurred | 0 | 0 | 0 | 0
Property |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net claims and claim expenses incurred – prior accident years |  |  | (113,332) | (51,810)
Property | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross premiums written | 1,402,606 | 1,218,321 | 2,706,805 | 2,561,829
Net premiums written | 1,144,655 | 887,975 | 2,164,484 | 1,778,141
Net premiums earned | 758,686 | 623,581 | 1,446,106 | 1,242,172
Net claims and claim expenses incurred | 281,993 | 171,924 | 469,602 | 431,685
Acquisition expenses | 140,606 | 137,567 | 285,925 | 264,663
Operational expenses | 55,077 | 49,627 | 110,890 | 96,559
Underwriting income (loss) | 281,010 | 264,463 | 579,689 | 449,265
Net claims and claim expenses incurred – current accident year | 313,632 | 206,976 | 582,934 | 483,495
Net claims and claim expenses incurred – prior accident years | (31,639) | (35,052) | (113,332) | (51,810)
Total net incurred | $ 281,993 | $ 171,924 | $ 469,602 | $ 431,685
Net claims and claim expense ratio – current accident year | 41.30% | 33.20% | 40.30% | 38.90%
Net claims and claim expense ratio – prior accident years | (4.10%) | (5.60%) | (7.80%) | (4.10%)
Net claims and claim expense ratio – calendar year | 37.20% | 27.60% | 32.50% | 34.80%
Underwriting expense ratio | 25.80% | 30.00% | 27.40% | 29.00%
Combined ratio | 63.00% | 57.60% | 59.90% | 63.80%
Casualty and Specialty |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net claims and claim expenses incurred – prior accident years |  |  | $ (23,518) | $ (8,980)
Casualty and Specialty | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross premiums written | $ 1,249,015 | $ 1,246,318 | 2,735,077 | 2,845,774
Net premiums written | 1,051,148 | 975,641 | 2,295,022 | 2,250,692
Net premiums earned | 1,026,576 | 832,802 | 2,019,706 | 1,700,636
Net claims and claim expenses incurred | 649,218 | 534,315 | 1,262,809 | 1,116,287
Acquisition expenses | 281,939 | 223,671 | 568,877 | 473,082
Operational expenses | 25,414 | 22,893 | 47,075 | 43,868
Underwriting income (loss) | 70,005 | 51,923 | 140,945 | 67,399
Net claims and claim expenses incurred – current accident year | 649,677 | 542,220 | 1,286,327 | 1,125,267
Net claims and claim expenses incurred – prior accident years | (459) | (7,905) | (23,518) | (8,980)
Total net incurred | $ 649,218 | $ 534,315 | $ 1,262,809 | $ 1,116,287
Net claims and claim expense ratio – current accident year | 63.30% | 65.10% | 63.70% | 66.20%
Net claims and claim expense ratio – prior accident years | (0.10%) | (0.90%) | (1.20%) | (0.60%)
Net claims and claim expense ratio – calendar year | 63.20% | 64.20% | 62.50% | 65.60%
Underwriting expense ratio | 30.00% | 29.60% | 30.50% | 30.40%
Combined ratio | 93.20% | 93.80% | 93.00% | 96.00%

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