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FAIR VALUE- Rollforward (Details) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 28, 2022 | Feb. 28, 2021
FAIR VALUE |  |
Balance at the beginning of the period | $ 369,449 | $ 310,842
Purchase | 13,616 | 20,349
Disposal | (2,219) |
Transfer in due to reclassification |  | 22,579
Changes in fair value | (41,698) | 19,145
Impairment loss | (204,807) | (10,029)
Foreign exchange difference | 8 | 6,563
Balance at the end of the period | $ 134,349 | $ 369,449

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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
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