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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Employer's contribution (as a percent) | 16.00% |  |
Defined contributions schemes expense | $ 8,064 | $ 11,738 | $ 12,544
Percentage of applicable salaries contributed by the employer for housing funds | 8.00% |  |
Amount of contribution by the employer for medical insurance benefits, housing funds, unemployment and other statutory benefits | $ 11,486 | $ 11,409 | $ 11,211
Minimum |  |  |
Percentage of applicable salaries contributed by the employer for medical insurance benefits | 6.00% |  |
Percentage of applicable salaries contributed by the employer for unemployment benefits | 0.50% |  |
Percentage of applicable salaries contributed by the employer for other statutory benefits | 0.90% |  |
Maximum |  |  |
Percentage of applicable salaries contributed by the employer for medical insurance benefits | 8.50% |  |
Percentage of applicable salaries contributed by the employer for unemployment benefits | 0.70% |  |
Percentage of applicable salaries contributed by the employer for other statutory benefits | 2.50% |  |

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- Definition Represents the amount of contributions made by an employer to the medical insurance benefits, housing funds, unemployment and other statutory benefits of a defined contribution plan. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the percentage of employees' applicable salaries for which the employer contributes to the housing funds of a defined contribution plan. + References No definition available. + Details
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X
- Definition Represents the percentage of employees' applicable salaries for which the employer contributes to the medical insurance benefits of a defined contribution plan. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of employees' applicable salaries for which the employer contributes to the other statutory benefits of a defined contribution plan. + References No definition available. + Details
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X
- Definition Represents the percentage of employees' applicable salaries for which the employer contributes to the unemployment benefits of a defined contribution plan. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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- Details
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