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Summary of Significant Accounting Policies - Schedule of estimated useful lives of intangible assets (Detail) | 9 Months Ended
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Sep. 30, 2021
Customer-related intangible assets | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 1 year
Customer-related intangible assets | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 11 years
Marketing-related intangible assets | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 1 year
Marketing-related intangible assets | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 10 years
Technology-related intangible assets | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 2 years
Technology-related intangible assets | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Intangible assets estimated useful lives | 8 years

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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