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Impairments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Goodwill [Line Items]
Capitalized hosting arrangements			$ 974		$ 291	$ 974
Capitalized internal-use software					769
Capitalized website development assets			5,833		1,882	5,833
Impairment of intangible asset	$ 0		0		6,624	7,538	$ 7,538
Impairment of goodwill			0		19,568	115,206
Amortization of intangible assets	813		$ 509		1,830	3,148
Accumulated impairment losses of goodwill	134,774				134,774		$ 115,206
Digital Wholesale
Goodwill [Line Items]
Impairment of intangible asset					$ 6,624	$ 7,538
Car Offer
Goodwill [Line Items]
Non-cash impairment charge allocated to the right-of-use assets		$ 499
Capitalized hosting arrangements		291
Capitalized internal-use software		769
Capitalized website development assets		4,801
Impairment of intangible asset		6,624
Impairment of goodwill		19,568
Goodwill fair value		0		$ 0
Car Offer | Digital Wholesale
Goodwill [Line Items]
Non-cash impairment charge allocated to the right-of-use assets		499
Capitalized hosting arrangements		291
Capitalized internal-use software		769
Wholesale cost of revenue impairment for capitalized website development		2,919
Operating expense impairment for capitalized website development		1,882
Impairment of intangible asset		6,624
Goodwill impairment charge pre-tax impact		19,568		$ 19,568
Goodwill and other asset impairment	$ 0	$ 32,552

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