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Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Total Assets	¥ 970,771	¥ 1,837,448
Non Marketable Equity Investments [Member]
Assets
Total Assets	856,211	86,501
Wealth Management Products [Member]
Assets
Total Assets	114,560	1,694,660
Financial guarantee derivative [Member]
Assets
Total Assets		56,287
Fair Value, Inputs, Level 2 [Member]
Assets
Total Assets	114,560	1,694,660
Fair Value, Inputs, Level 2 [Member] | Wealth Management Products [Member]
Assets
Total Assets	114,560	1,694,660
Fair Value, Inputs, Level 3 [Member]
Assets
Total Assets	856,211	142,788
Fair Value, Inputs, Level 3 [Member] | Non Marketable Equity Investments [Member]
Assets
Total Assets	¥ 856,211	86,501
Fair Value, Inputs, Level 3 [Member] | Financial guarantee derivative [Member]
Assets
Total Assets		¥ 56,287

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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