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RESERVE FOR LOSSES AND LOSS EXPENSES (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Net Favorable Prior Year Reserve Development [Line Items] |  |  |  |
Net favorable prior year reserve development | $ 47,768 | $ 76,019 | $ 143,495 | $ 224,131
Insurance [Member] |  |  |  |
Net Favorable Prior Year Reserve Development [Line Items] |  |  |  |
Net favorable prior year reserve development | 2,603 | 20,688 | 30,740 | 43,181
Reinsurance [Member] |  |  |  |
Net Favorable Prior Year Reserve Development [Line Items] |  |  |  |
Net favorable prior year reserve development | $ 45,165 | $ 55,331 | $ 112,755 | $ 180,950

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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 + Details
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