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PRC CONTRIBUTION AND PROFIT APPROPRIATION (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
China
PRC Contribution and Profit Appropriation
After-tax profits to general reserve (as a percent)	10.00%
Minimum respective registered capital (as a percent)	50.00%
Appropriation to statutory reserve required for education development reserve (as a percent of after tax profit)	25.00%
China | Minimum
PRC Contribution and Profit Appropriation
Appropriation to statutory surplus reserve (as percent of after tax profit)	5.00%
China | Maximum
PRC Contribution and Profit Appropriation
Appropriation to statutory surplus reserve (as percent of after tax profit)	10.00%
Foreign Plan
PRC Contribution and Profit Appropriation
Employer contributions	¥ 29,910	¥ 44,456	¥ 37,594

X

- Definition

Represents the percentage of after tax profit required to be appropriated to the education development reserve under PRC GAAP.

+ References

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- Definition

Represents the percentage of after tax profit required to be appropriated to the general reserve under PRC GAAP.

+ References

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- Definition

Represents the percentage of after tax profit required to be appropriated to the statutory surplus reserve under PRC GAAP.

+ References

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- Definition

Represents the level of the fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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