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Segment Reporting (Schedule Of Significant Components Of The Company's Revenues And Expenses) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written | $ 200,992 | $ 182,649 | $ 1,417,792 | $ 1,521,290 |
Net premiums written | 159,713 | 127,241 | 956,467 | 1,123,163 |
Net premiums earned | 258,979 | 294,717 | 805,929 | 857,861 |
Net claims and claim expenses incurred | 69,647 | 60,928 | 209,950 | 192,141 |
Acquisition expenses | 37,550 | 37,699 | 104,727 | 94,475 |
Operational expenses | 46,972 | 44,672 | 135,437 | 133,447 |
Underwriting income (loss) | 104,810 | 151,418 | 355,815 | 437,798 |
Net investment income | 24,941 | 59,931 | 98,430 | 129,296 |
Net foreign exchange gains | 5,036 | 488 | 6,367 | 170 |
Equity in earnings of other ventures | 9,806 | 7,313 | 21,237 | 16,920 |
Other (loss) income | (1,169) | 651 | (1,642) | (2,186) |
Net realized and unrealized (losses) gains on investments | (31,097) | 28,472 | 10,958 | (26,788) |
Corporate expenses | (3,905) | (4,307) | (12,404) | (30,318) |
Interest expense | (4,290) | (4,298) | (12,875) | (13,632) |
Income from continuing operations before taxes | 104,132 | 239,668 | 465,886 | 511,260 |
Income tax expense | (245) | (223) | (207) | (356) |
Income (loss) from discontinued operations |  | (9,779) |  | 2,422 |
Net income attributable to noncontrolling interests | (30,477) | (44,331) | (109,323) | (96,953) |
Dividends on preference shares | (5,595) | (5,595) | (16,786) | (19,353) |
Net income available to RenaissanceRe common shareholders | 67,815 | 179,740 | 339,570 | 397,020 |
Net claims and claim expenses incurred – current accident year | 94,987 | 68,154 | 269,066 | 263,843 |
Net claims and claim expenses incurred – prior accident years | (25,340) | (7,226) | (59,116) | (71,702) |
Net claims and claim expenses incurred – total | 69,647 | 60,928 | 209,950 | 192,141 |
Net claims and claim expense ratio – current accident year | 36.70% | 23.10% | 33.40% | 30.80% |
Net claims and claim expense ratio – prior accident years | (9.80%) | (2.40%) | (7.30%) | (8.40%) |
Net claims and claim expense ratio – calendar year | 26.90% | 20.70% | 26.10% | 22.40% |
Underwriting expense ratio | 32.60% | 27.90% | 29.80% | 26.60% |
Combined ratio | 59.50% | 48.60% | 55.90% | 49.00% |
Intersegment Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written |  |  |  | (1,000) |
Catastrophe Reinsurance |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written | 68,252 | 82,539 | 924,046 | 1,138,238 |
Net premiums written | 41,807 | 32,380 | 534,994 | 774,585 |
Net premiums earned | 136,719 | 184,416 | 460,455 | 571,550 |
Net claims and claim expenses incurred | (666) | 16,897 | 42,519 | 72,520 |
Acquisition expenses | 9,131 | 14,049 | 34,063 | 37,866 |
Operational expenses | 24,154 | 24,573 | 66,773 | 74,287 |
Underwriting income (loss) | 104,100 | 128,897 | 317,100 | 386,877 |
Net claims and claim expenses incurred – current accident year | 9,661 | 23,041 | 60,663 | 115,586 |
Net claims and claim expenses incurred – prior accident years | (10,327) | (6,144) | (18,144) | (43,066) |
Net claims and claim expenses incurred – total | (666) | 16,897 | 42,519 | 72,520 |
Net claims and claim expense ratio – current accident year | 7.10% | 12.50% | 13.20% | 20.20% |
Net claims and claim expense ratio – prior accident years | (7.60%) | (3.30%) | (4.00%) | (7.50%) |
Net claims and claim expense ratio – calendar year | (0.50%) | 9.20% | 9.20% | 12.70% |
Underwriting expense ratio | 24.40% | 20.90% | 21.90% | 19.60% |
Combined ratio | 23.90% | 30.10% | 31.10% | 32.30% |
Specialty Reinsurance |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written | 68,883 | 60,156 | 274,727 | 201,025 |
Net premiums written | 61,879 | 55,717 | 233,622 | 188,584 |
Net premiums earned | 63,473 | 63,045 | 186,691 | 159,060 |
Net claims and claim expenses incurred | 31,759 | 17,520 | 77,915 | 53,723 |
Acquisition expenses | 15,806 | 14,691 | 44,052 | 32,139 |
Operational expenses | 10,234 | 7,303 | 30,854 | 22,458 |
Underwriting income (loss) | 5,674 | 23,531 | 33,870 | 50,740 |
Net claims and claim expenses incurred – current accident year | 46,444 | 20,227 | 113,809 | 76,983 |
Net claims and claim expenses incurred – prior accident years | (14,685) | (2,707) | (35,894) | (23,260) |
Net claims and claim expenses incurred – total | 31,759 | 17,520 | 77,915 | 53,723 |
Net claims and claim expense ratio – current accident year | 73.20% | 32.10% | 61.00% | 48.40% |
Net claims and claim expense ratio – prior accident years | (23.20%) | (4.30%) | (19.30%) | (14.60%) |
Net claims and claim expense ratio – calendar year | 50.00% | 27.80% | 41.70% | 33.80% |
Underwriting expense ratio | 41.10% | 34.90% | 40.20% | 34.30% |
Combined ratio | 91.10% | 62.70% | 81.90% | 68.10% |
Lloyd's |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written | 63,857 | 39,954 | 219,019 | 183,015 |
Net premiums written | 56,027 | 39,014 | 187,848 | 159,581 |
Net premiums earned | 58,788 | 47,150 | 158,757 | 126,862 |
Net claims and claim expenses incurred | 39,027 | 28,175 | 90,419 | 68,239 |
Acquisition expenses | 12,614 | 8,938 | 33,303 | 24,338 |
Operational expenses | 12,475 | 12,559 | 37,566 | 36,193 |
Underwriting income (loss) | (5,328) | (2,522) | (2,531) | (1,908) |
Net claims and claim expenses incurred – current accident year | 38,882 | 24,886 | 94,594 | 71,274 |
Net claims and claim expenses incurred – prior accident years | 145 | 3,289 | (4,175) | (3,035) |
Net claims and claim expenses incurred – total | 39,027 | 28,175 | 90,419 | 68,239 |
Net claims and claim expense ratio – current accident year | 66.10% | 52.80% | 59.60% | 56.20% |
Net claims and claim expense ratio – prior accident years | 0.30% | 7.00% | (2.60%) | (2.40%) |
Net claims and claim expense ratio – calendar year | 66.40% | 59.80% | 57.00% | 53.80% |
Underwriting expense ratio | 42.70% | 45.50% | 44.60% | 47.70% |
Combined ratio | 109.10% | 105.30% | 101.60% | 101.50% |
Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross premiums written | 0 | 0 | 0 | (988) | [1]
Net premiums written | 0 | 130 | 3 | 413 |
Net premiums earned | (1) | 106 | 26 | 389 |
Net claims and claim expenses incurred | (473) | (1,664) | (903) | (2,341) |
Acquisition expenses | (1) | 21 | (6,691) | 132 |
Operational expenses | 109 | 237 | 244 | 509 |
Underwriting income (loss) | 364 | 1,512 | 7,376 | 2,089 |
Net investment income | 24,941 | 59,931 | 98,430 | 129,296 |
Net foreign exchange gains | 5,036 | 488 | 6,367 | 170 |
Equity in earnings of other ventures | 9,806 | 7,313 | 21,237 | 16,920 |
Other (loss) income | (1,169) | 651 | (1,642) | (2,186) |
Net realized and unrealized (losses) gains on investments | (31,097) | 28,472 | 10,958 | (26,788) |
Corporate expenses | (3,905) | (4,307) | (12,404) | (30,318) |
Interest expense | (4,290) | (4,298) | (12,875) | (13,632) |
Income tax expense | (245) | (223) | (207) | (356) |
Income (loss) from discontinued operations |  | (9,779) |  | 2,422 |
Net income attributable to noncontrolling interests | (30,477) | (44,331) | (109,323) | (96,953) |
Dividends on preference shares | (5,595) | (5,595) | (16,786) | (19,353) |
Net claims and claim expenses incurred – current accident year | 0 | 0 | 0 | 0 |
Net claims and claim expenses incurred – prior accident years | (473) | (1,664) | (903) | (2,341) |
Net claims and claim expenses incurred – total | $ (473) | $ (1,664) | $ (903) | $ (2,341) |
Net claims and claim expense ratio – current accident year | 0.00% | 0.00% | 0.00% | 0.00% |
Net claims and claim expense ratio – prior accident years | 47300.00% | (1569.80%) | (3473.10%) | (601.80%) |
Net claims and claim expense ratio – calendar year | 47300.00% | (1569.80%) | (3473.10%) | (601.80%) |
Underwriting expense ratio | (10800.00%) | 243.40% | (24796.10%) | 164.80% |
Combined ratio | 36500.00% | (1326.40%) | (28269.20%) | (437.00%) |
[1] | Included in gross premiums written in the Other category is the elimination of inter-segment gross premiums written of $1.0 million.

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