Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
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Indicates valuation technique for measuring investment in debt security at fair value with change in fair value recognized in net income (trading).

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-Publisher FASB
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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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No definition available.

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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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FAIR VALUE MEASUREMENT - Fair value of the available-for-sale debt securities (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2019 CNY (¥) item	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
FAIR VALUE MEASUREMENT
Unrealized gain on available-for-sale securities, net of tax effect	$ 0	¥ 0	¥ 116,540	¥ 110,702
Unrealized fair value gain netting relevant income tax recognized in other comprehensive income \| ¥		¥ 0	¥ 38,847	¥ 36,900
Level 3
FAIR VALUE MEASUREMENT
Fair value valuation technique of the available-for-sale debt securities	us-gaap:ValuationTechniqueDiscountedCashFlowMember	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Level 3 \| Terminal growth rate
FAIR VALUE MEASUREMENT
Fair value input of the available-for-sale debt securities	0.03	0.03
Level 3 \| Discount rate
FAIR VALUE MEASUREMENT
Fair value input of the available-for-sale debt securities	0.18	0.18
Level 3 \| Risk-free rate
FAIR VALUE MEASUREMENT
Fair value input of the available-for-sale debt securities	0.0284	0.0284