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Revenue Recognition - Summary of Revenue from Contracts with Customers by Services and Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 225,158	$ 215,796
Marketplace
Disaggregation of Revenue [Line Items]
Revenue	212,235	187,219
Dealer-to-Dealer
Disaggregation of Revenue [Line Items]
Revenue	8,165	18,499
Sell My Car - Instant Max Cash Offer
Disaggregation of Revenue [Line Items]
Revenue	$ 4,758	$ 10,078

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