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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Changes in AOCI by Component |  |  |
Other comprehensive income |  | $ 21 | $ 25,296
Net Unrealized Gain (Loss) on Investments |  |  |
Changes in AOCI by Component |  |  |
Balance at the beginning | $ 0 | (21) | (25,317)
OCI before reclassifications |  | (2,385) | (13,268)
Amounts reclassified from AOCI |  | 2,406 | 38,564
Other comprehensive income | 0 | 21 | 25,296
Balance at the end | $ 0 | $ 0 | $ (21)

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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