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Summary of Principal Accounting Policies - Amounts in Noah Investment and its Subsidiaries and the Consolidated Funds Included in Consolidated Financial Statements Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Summary of Principal Accounting Policies
Increase in amounts due to the Group's subsidiaries	¥ 583,347	$ 83,793	¥ 606,440	¥ 498,557

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- References

No definition available.

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- Definition

The increase (decrease) in current obligations (due within one year or one operating cycle) owed to an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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