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Acquisitions - Summary of Preliminary Purchase Price Allocation (Parenthetical) (Details) - Car Offer - USD ($) $ in Thousands |  | 9 Months Ended
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Jan. 14, 2021 | Sep. 30, 2021
Business Acquisition [Line Items] |  |  |
Intangible assets | [1] | $ 104,100 |
Goodwill estimated to be deductible under IRC Section 197 |  | 28,991 |
Additional stock-based compensation expense |  |  | $ 1,229
Developed Technology |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 63,000 |
Estimated useful lives |  | 3 years |
Brand |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 23,100 |
Estimated useful lives |  | 11 years |
Customer Relationships |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 18,000 |
Estimated useful lives |  | 3 years |
[1] | Identifiable definite-lived intangible assets were comprised of developed technology, brand, and customer relationships of $63,000, $23,100, and $18,000, respectively, with estimated useful lives of 3 years, 11 years, and 3 years, respectively, which will be amortized on a straight-line basis over their estimated useful lives. The fair value of the developed technology has been estimated using the multi-period excess earnings method which is a variation of the income approach. The fair value of the brand and customer relationships has been estimated using the relief from royalty method and the with/without approach, respectively.

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