Consolidated Statements of Redeemable Noncontrolling Interest and Stockholders' Equity - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 373,586			$ 94	$ 19	$ 242,181	$ 129,412	$ 1,880
Beginning balance, Shares at Dec. 31, 2020				94,310,309	19,076,500
Redeemable Noncontrolling Interest, Beginning balance at Dec. 31, 2020	0
Net (loss) income	109,244						109,244
Redeemable noncontrolling interest, net (loss) income	1,129
Stock–based compensation expense	56,772					56,772
Issuance of common stock upon exercise of stock options	663					663
Issuance of common stock upon exercise of stock options, Shares				222,147
Issuance of common stock upon vesting of restricted stock units				$ 2		(2)
Issuance of common stock upon vesting of restricted stock units, Shares				1,575,206
Payment of withholding taxes on net share settlements of restricted stock units	(15,388)					(15,388)
Payment of withholding taxes on net share settlements of restricted stock units, Shares		(527,237)		(527,237)
Conversion of common stock				$ 3
Conversion of common stock, shares issued				3,077,327
Conversion of common stock, shares converted					(3,077,327)
Conversion of common stock, value					$ (3)
Issuance of common stock upon for acquisition	103,645			$ 3		103,642
Issuance of common stock upon for acquisition, Shares				3,115,282
Acquisition of interest in CarOffer, LLC	60,982
Redeemable noncontrolling interest, accretion to redemption value	109,398
Accretion to redeemable noncontrolling interest redemption value	(109,398)						(109,398)
Tax distributions to redeemable noncontrolling interest holders	(8,701)
Foreign currency translation adjustment	(2,283)							(2,283)
Ending balance at Dec. 31, 2021	516,841			$ 102	$ 16	387,868	129,258	(403)
Ending balance, Shares at Dec. 31, 2021				101,773,034	15,999,173
Redeemable Noncontrolling Interest, Ending Balance at Dec. 31, 2021	162,808
Net (loss) income	84,387						84,387
Redeemable noncontrolling interest, net (loss) income	(5,433)
Stock–based compensation expense	59,245					59,245
Issuance of common stock upon exercise of stock options	721					721
Issuance of common stock upon exercise of stock options, Shares				131,061
Issuance of common stock upon vesting of restricted stock units				$ 1		(1)
Issuance of common stock upon vesting of restricted stock units, Shares				1,649,294
Payment of withholding taxes on net share settlements of restricted stock units	(16,025)					(16,025)
Payment of withholding taxes on net share settlements of restricted stock units, Shares		(566,267)		(566,267)
Repurchase of common stock	(18,717)			$ (1)		(18,716)
Repurchase of common stock, Shares				(1,350,473)
Redeemable noncontrolling interest, accretion to redemption value	(109,398)
Accretion to redeemable noncontrolling interest redemption value	109,398						109,398
Tax distributions to redeemable noncontrolling interest holders	(11,228)
Foreign currency translation adjustment	(1,241)							(1,241)
Ending balance at Dec. 31, 2022	734,609			$ 102	$ 16	413,092	323,043	(1,644)
Ending balance, Shares at Dec. 31, 2022		101,636,649	15,999,173	101,636,649	15,999,173
Redeemable Noncontrolling Interest, Ending Balance at Dec. 31, 2022	36,749
Net (loss) income	36,942						36,942
Redeemable noncontrolling interest, net (loss) income	(14,889)
Stock–based compensation expense	63,312					63,312
Issuance of common stock upon exercise of stock options	74					74
Issuance of common stock upon exercise of stock options, Shares				15,834
Issuance of common stock upon vesting of restricted stock units				$ 1		(1)
Issuance of common stock upon vesting of restricted stock units, Shares				2,440,510
Payment of withholding taxes on net share settlements of restricted stock units	(15,729)					(15,729)
Payment of withholding taxes on net share settlements of restricted stock units, Shares		(840,995)		(840,995)
Acquisition of interest in CarOffer, LLC	(21,838)
Acquisition of remaining interest in CarOffer, LLC	2,720					8,558	(5,838)
Repurchase of common stock	(205,819)			$ (11)		(205,808)
Repurchase of common stock, Shares				(11,076,755)
Tax distributions to redeemable noncontrolling interest holders	(22)
Foreign currency translation adjustment	743							743
Ending balance at Dec. 31, 2023	616,852			$ 92	$ 16	$ 263,498	$ 354,147	$ (901)
Ending balance, Shares at Dec. 31, 2023		92,175,243	15,999,173	92,175,243	15,999,173
Redeemable Noncontrolling Interest, Ending Balance at Dec. 31, 2023	$ 0