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Taxation (Movement of Valuation Allowance for Net Deferred Tax Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Beginning balance | $ 326,755 | $ 283,711 | $ 250,524
Provision for the year | 45,787 | 36,363 | 44,634
Reversal for the year | (91,019) | (12,637) | (7,311)
Foreign currency translation adjustment | 7,574 | 19,318 | (4,136)
Ending balance | $ 289,097 | $ 326,755 | $ 283,711

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- Definition Valuation allowance deferred tax assets addition. + References No definition available. + Details
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- Definition Valuation allowance deferred tax assets reversal. + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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