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Segment Information - Revenue from External Customers by Geographic Areas (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	¥ 3,413,176	$ 490,272	¥ 3,310,062	¥ 2,846,006
Mainland of China
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	2,467,351		2,555,982	2,300,534
Hong Kong
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	733,125		751,051	545,472
Overseas
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	212,700		3,029
Wealth Management Business
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	2,329,853		2,318,212	2,141,395
Wealth Management Business | Mainland of China
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	1,494,742		1,750,754	1,788,135
Wealth Management Business | Hong Kong
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	633,168		565,061	353,260
Wealth Management Business | Overseas
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	201,943		2,397
Asset Management Business
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	787,551		751,759	590,640
Asset Management Business | Mainland of China
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	676,837		565,137	398,428
Asset Management Business | Hong Kong
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	99,957		185,990	192,212
Asset Management Business | Overseas
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	10,757		632
Lending and Other Businesses
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	295,772		240,091	113,971
Lending and Other Businesses | Mainland of China
Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]
Revenues	¥ 295,772		¥ 240,091	¥ 113,971

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- Definition

Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Line Items]

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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