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OTHER COMPREHENSIVE INCOME (LOSS) (Reclassifications Out of AOCI Into Net Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items] |  |  |  |  |
Other investment gains (losses) | $ (12,082) | $ 20,044 | $ (69,917) | $ (1,318) |
OTTI losses | (5,546) | (5,412) | (7,634) | (13,493) |
Total before tax | 48,903 | (482,300) | 222,202 | (371,686) |
Foreign exchange loss | (8,305) | (32,510) | (2,066) | (90,093) |
Income tax (expense) benefit | 3,525 | 25,877 | 3,565 | 38,547 |
Net income (loss) available (attributable) to common shareholders | 43,439 | (467,740) | 198,843 | (377,695) |
Cumulative translation adjustment related to AXIS Specialty Australia |  |  | 0 | 24,149 | $ 24,000
Unrealized investment gains (losses) on available for sale investments | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items] |  |  |  |  |
Other investment gains (losses) | (21,350) | 21,337 | (71,918) | 5,224 |
OTTI losses | (5,546) | (5,412) | (7,634) | (13,493) |
Total before tax | (26,896) | 15,925 | (79,552) | (8,269) |
Income tax (expense) benefit | 972 | (2,639) | 2,363 | (1,900) |
Net income (loss) available (attributable) to common shareholders | (25,924) | 13,286 | (77,189) | (10,169) |
Foreign currency translation adjustment | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items] |  |  |  |  |
Foreign exchange loss | 0 | 0 | 0 | (24,149) |
Income tax (expense) benefit | 0 | 0 | 0 | 0 |
Net income (loss) available (attributable) to common shareholders | $ 0 | $ 0 | $ 0 | $ (24,149) |

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- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include the change in fair value of investment-related derivatives not designated as hedges and any hedge ineffectiveness recognized in earnings in relation to investment portfolio-related fair value hedges. + References No definition available. + Details
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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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