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v3.20.1

Summary of Principal Accounting Policies - Summary of Effects of Changes in Group's Ownership Interest in Less than Wholly Owned Subsidiaries on Equity Attributable to Noah Holdings Limited Shareholders (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |
Net income attributable to Noah Holdings Limited shareholders | ¥ 829,151 | $ 119,098 | ¥ 811,297 | ¥ 762,923
Transfers from the non-controlling interest: |  |  |  |
Increase in Noah's capital from contribution of Non controlling interest | 518,613 |  | 63,929 | 35,123
Net transfers from non-controlling interest | 17,640 | 2,534 |  | 30
Change from net income attributable to Noah and transfers from non-controlling interest | 846,791 | 121,632 | ¥ 811,297 | 762,953
Parent |  |  |  |
Transfers from the non-controlling interest: |  |  |  |
Increase in Noah's equity by partial disposal of subsidiaries |  |  |  | ¥ 30
Increase in Noah's capital from contribution of Non controlling interest | ¥ 17,640 | $ 2,534 |  |

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- Definition This element represents the total net income attributable to the parent for the period and the effect of net changes during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not result in a deconsolidation of the subsidiary from the consolidated financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591554-111686 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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