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Property and Equipment, Net - Schedule of Depreciation Included in Consolidated Statements of Income and Comprehensive Income (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income [Line Items]
Depreciation	¥ 213,082	$ 33,437	¥ 115,354	¥ 34,734
Fulfillment expenses
Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income [Line Items]
Depreciation	195,022	30,603	107,333	31,988
Sales and marketing expenses
Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income [Line Items]
Depreciation	2,666	419	2,018	865
General and administrative expenses
Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income [Line Items]
Depreciation	7,395	1,160	4,731	1,520
Product development expenses
Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income [Line Items]
Depreciation	¥ 7,999	$ 1,255	¥ 1,272	¥ 361

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- Definition

Schedule Of Depreciation Included In Consolidated Statements Of Income And Comprehensive Income LineItems.

+ References

No definition available.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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