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SHORT TERM INVESTMENTS (Schedule of Amortized Cost, Gross Unrecognized Holding Gains and Losses, Gross Unrealized Gain in Accumulated Other Comprehensive Income, and Estimated Fair Value of Investments) (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fixed-Rate Financial Products [Member]
Held-to-maturity investments
Amortized Cost	¥ 70,000	¥ 93,000
Gross unrealized gain in accumulated other comprehensive income	0	0
Estimated Fair value	70,000	93,000
Adjustable-Rate Financial Products [Member]
Available-for-sale investments
Amortized Cost	47,000	128,000
Gross unrealized gain in accumulated other comprehensive income	208	42
Estimated Fair value	¥ 47,208	¥ 128,042

X

- Definition

Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as held to maturity.

+ References

No definition available.

+ Details

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X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

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- Definition

Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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