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SEGMENT INFORMATION (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) reportable_segment | Jun. 30, 2020 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | reportable_segment |  |  | 2 |
Segment Information [Line Items] |  |  |  |
Net premiums earned | $ 1,156,941 | $ 1,104,003 | $ 2,260,663 | $ 2,192,628
Other insurance related income | 5,817 | 1,996 | 8,598 | (6,710)
Net losses and loss expenses | (666,473) | (676,261) | (1,381,190) | (1,584,335)
Acquisition costs | (219,070) | (228,502) | (437,941) | (467,152)
Expenses | (162,452) | (140,652) | (320,860) | (297,712)
Net investment income | 104,672 | 45,040 | 218,836 | 138,140
Net investment gains | 73,293 | 53,043 | 102,936 | (9,831)
Foreign exchange losses | (19,602) | (9,709) | (23,716) | 51,974
Interest expense and financing costs | (15,235) | (20,595) | (30,806) | (44,067)
Reorganization expenses | 0 | (392) | 0 | 591
Amortization of value of business acquired | (1,028) | (1,285) | (2,056) | (3,083)
Amortization of intangible assets | (3,324) | (2,855) | (6,013) | (5,725)
Income before income taxes and interest in income of equity method investments | 253,539 | 123,831 | 388,451 | (35,282)
Operating Segments |  |  |  |
Segment Information [Line Items] |  |  |  |
Gross premiums written | 1,941,186 | 1,716,183 | 4,476,667 | 4,147,341
Net premiums written | 1,203,858 | 1,055,934 | 2,982,744 | 2,734,978
Net premiums earned | 1,156,941 | 1,104,003 | 2,260,663 | 2,192,628
Other insurance related income | 5,817 | 1,996 | 8,598 | (6,710)
Net losses and loss expenses | (666,473) | (676,261) | (1,381,190) | (1,584,335)
Acquisition costs | (219,070) | (228,502) | (437,941) | (467,152)
Expenses | (128,961) | (113,824) | (261,629) | (243,786)
Underwriting income | $ 148,254 | $ 87,412 | $ 188,501 | $ (109,355)
Net losses and loss expenses ratio | 57.60% | 61.30% | 61.10% | 72.30%
Acquisition cost ratio | 18.90% | 20.70% | 19.40% | 21.30%
General and administrative expense ratio | 14.10% | 12.70% | 14.20% | 13.50%
Combined ratio | 90.60% | 94.70% | 94.70% | 107.10%
Goodwill and intangible assets | $ 315,087 | $ 327,095 | $ 315,087 | $ 327,095
Operating Segments | Insurance |  |  |  |
Segment Information [Line Items] |  |  |  |
Gross premiums written | 1,268,472 | 1,037,568 | 2,371,670 | 1,978,283
Net premiums written | 712,885 | 602,761 | 1,420,699 | 1,184,411
Net premiums earned | 631,675 | 577,019 | 1,247,962 | 1,139,083
Other insurance related income | 552 | 755 | 967 | 1,403
Net losses and loss expenses | (332,175) | (337,367) | (689,072) | (809,180)
Acquisition costs | (106,963) | (116,259) | (224,642) | (229,010)
Expenses | (99,569) | (89,751) | (202,872) | (190,529)
Underwriting income | $ 93,520 | $ 34,397 | $ 132,343 | $ (88,233)
Net losses and loss expenses ratio | 52.60% | 58.50% | 55.20% | 71.00%
Acquisition cost ratio | 16.90% | 20.10% | 18.00% | 20.10%
General and administrative expense ratio | 15.80% | 15.60% | 16.30% | 16.80%
Combined ratio | 85.30% | 94.20% | 89.50% | 107.90%
Goodwill and intangible assets | $ 315,087 | $ 327,095 | $ 315,087 | $ 327,095
Operating Segments | Reinsurance |  |  |  |
Segment Information [Line Items] |  |  |  |
Gross premiums written | 672,714 | 678,615 | 2,104,997 | 2,169,058
Net premiums written | 490,973 | 453,173 | 1,562,045 | 1,550,567
Net premiums earned | 525,266 | 526,984 | 1,012,701 | 1,053,545
Other insurance related income | 5,265 | 1,241 | 7,631 | (8,113)
Net losses and loss expenses | (334,298) | (338,894) | (692,118) | (775,155)
Acquisition costs | (112,107) | (112,243) | (213,299) | (238,142)
Expenses | (29,392) | (24,073) | (58,757) | (53,257)
Underwriting income | $ 54,734 | $ 53,015 | $ 56,158 | $ (21,122)
Net losses and loss expenses ratio | 63.60% | 64.30% | 68.30% | 73.60%
Acquisition cost ratio | 21.30% | 21.30% | 21.10% | 22.60%
General and administrative expense ratio | 5.70% | 4.60% | 5.80% | 5.00%
Combined ratio | 90.60% | 90.20% | 95.20% | 101.20%
Goodwill and intangible assets | $ 0 | $ 0 | $ 0 | $ 0
Corporate Expenses |  |  |  |
Segment Information [Line Items] |  |  |  |
Expenses | (33,491) | (26,828) | (59,231) | (53,926)
Segment Reconciling Items |  |  |  |
Segment Information [Line Items] |  |  |  |
Net investment income | 104,672 | 45,040 | 218,836 | 138,140
Net investment gains | 73,293 | 53,043 | 102,936 | (9,831)
Foreign exchange losses | (19,602) | (9,709) | (23,716) | 51,974
Interest expense and financing costs | (15,235) | (20,595) | (30,806) | (44,067)
Reorganization expenses | 0 | (392) | 0 | 591
Amortization of value of business acquired | (1,028) | (1,285) | (2,056) | (3,083)
Amortization of intangible assets | $ (3,324) | $ (2,855) | $ (6,013) | $ (5,725)

X
- 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 any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities, 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 The net gain or loss (both realized and unrealized) related to investments in certain entities that calculate net asset value per share and the amount after accretion (amortization) of discount (premium) of interest income and dividend income on nonoperating securities, net of investment expense. + References No definition available. + Details
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- Definition The adjustment that represents the periodic charge against earnings to reduce the value of business acquired (VOBA) over the expected life of the underlying insurance contracts. VOBA reflects the estimated fair value of a life insurance business in force and represents the portion of the cost to acquire the business that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. Such value is the present value of the actuarially determined projected cash flows for the acquired policies. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=122135039&loc=d3e569990-122904 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition Ratio of non-life losses and loss expenses to non-life net premiums earned. + References No definition available. + Details
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- Definition Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.5) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387 + Details
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Data Type: | na
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