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RESERVE FOR LOSSES AND LOSS EXPENSES - Narrative (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Aug. 05, 2019 | Mar. 20, 2017 | Mar. 19, 2017
Minimum |  |  |  |
Claims Development [Line Items] |  |  |  |
Development for an accident year or underwriting year, recognition period | 1 year |  |  |
Maximum |  |  |  |
Claims Development [Line Items] |  |  |  |
Development for an accident year or underwriting year, recognition period | 3 years |  |  |
Motor Reserve Class | Reinsurance |  |  |  |
Claims Development [Line Items] |  |  |  |
Discount rate |  | 0.25% | 0.75% | (2.50%)

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- Definition Discount rate used to obtain present value of liability for unpaid claim and claim adjustment expense for short-duration contract issued by insurance entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884468&loc=d3e14881-158438 + Details
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