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INCOME TAXES (Summary of Valuation Allowance) (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balance at the beginning of the year	¥ 20,115	¥ 14,362	¥ 3,647
Additions of valuation allowance	13,076	9,069	11,198
Reduction of valuation allowance	(6,684)	(3,316)	(483)
Balance at the end of the year	¥ 26,507	¥ 20,115	¥ 14,362

X

- Definition

Amount of increase in the valuation allowance for a specified deferred tax asset.

+ References

No definition available.

+ Details

Name:	tedu_ValuationAllowanceDeferredTaxAssetAdditions
Namespace Prefix:	tedu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of decrease in the valuation allowance for a specified deferred tax asset.

+ References

No definition available.

+ Details

Name:	tedu_ValuationAllowanceDeferredTaxAssetReductions
Namespace Prefix:	tedu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant