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Restricted Net Assets - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)
Restricted Assets Disclosure [Line Items]
Reserve Fund As a Percentage Of Registered Capital	50.00%	50.00%
Variable Interest Entity, Primary Beneficiary [Member] | CHINA
Restricted Assets Disclosure [Line Items]
Restricted assets	¥ 3,438,575	$ 539,587
Minimum [Member] | Variable Interest Entity, Primary Beneficiary [Member] | CHINA
Restricted Assets Disclosure [Line Items]
Percentage Of Annual After Tax Profit To Be Allocated To Statutory Reserves	10.00%
Statutory Funds As A Percentage Of Registered Capital	50.00%
Minimum [Member] | Subsidiaries [Member] | CHINA
Restricted Assets Disclosure [Line Items]
Percentage Of Annual After Tax Profit to Be Allocated To Reserve Fund	10.00%
Percentage Of Annual After Tax Profit To Be Allocated To Statutory Reserves	10.00%
Statutory Funds As A Percentage Of Registered Capital	50.00%

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Percentage of annual after tax profit to be allocated to reserve fund.

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- Definition

Percentage of annual after tax profit to be allocated to statutory reserves.

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- Definition

Reserve fund as a percentage of registered capital.

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Restricted assets disclosure.

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Statutory funds as a percentage of registered capital.

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- Definition

Total assets that cannot be used for operating purposes because of contract or regulatory requirements that are in effect for a period that extends beyond one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 210
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=120413173&loc=SL6242262-115580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 210
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120413209&loc=SL6242269-115581

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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