Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Facility	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Nov. 30, 2022 USD ($)
Accounting Policies [Line Items]
Other comprehensive income (loss)				$ 0	$ 0	$ 0	$ 0
Valuation allowance for finance receivables classified as held for sale				10,200,000		10,200,000		$ 10,500,000
Debt instrument aggregate principal amount				422,580,000		422,580,000		82,556,000
Repurchases of convertible senior notes						13,194,000
Cash and cash equivalents				237,925,000		237,925,000		398,915,000
Restricted Cash				66,300,000		66,300,000
Gain on debt extinguishment				$ 10,931,000		$ 19,640,000
Business combination, measurement period						1 year
ASU 2021-08
Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]				true		true
Change in accounting principle, accounting standards update, adoption date				Jan. 01, 2023		Jan. 01, 2023
Change in accounting principle, accounting standards update, immaterial effect [true false]				true		true
0.75% Unsecured Convertible Senior Notes Due 2026
Accounting Policies [Line Items]
Debt instrument aggregate principal amount			$ 625,000,000.0
Aggregate principal amount				$ 18,200,000		$ 32,800,000
Repurchases of convertible senior notes				7,300,000		13,200,000
Gain on debt extinguishment				10,900,000		19,600,000
Debt instrument interest rate			0.75%
Debt instrument maturity year			2026
Unamortized debt discount and debt issuance costs				5,100,000		5,100,000
Net carrying value of debt				327,400,000		327,400,000
Warehouse Credit Facility
Accounting Policies [Line Items]
Increased borrowing capacity				93,000,000.0		93,000,000.0		$ 105,800,000
Selling, General and Administrative Expenses
Accounting Policies [Line Items]
Advertising expense				15,000,000.0	21,100,000	26,400,000	54,900,000
Selling, General and Administrative Expenses | Shipping and Handling
Accounting Policies [Line Items]
Shipping and handling expenses				2,000,000.0	$ 8,200,000	$ 4,000,000.0	$ 35,000,000.0
UACC
Accounting Policies [Line Items]
Net proceeds from securitization	$ 23,100,000	$ 237,800,000
Number of warehouse credit facilities | Facility						4
UACC | Warehouse Credit Facility
Accounting Policies [Line Items]
Aggregate borrowing limit				850,000,000.0		$ 850,000,000.0
Increased borrowing capacity				93,000,000.0		93,000,000.0
Outstanding borrowings				177,900,000		177,900,000
Asset-backed Securities | UACC
Accounting Policies [Line Items]
Securitization transaction		$ 238,700,000
Vehicle Floorplan Facility | Line Of Credit
Accounting Policies [Line Items]
Increased borrowing capacity				171,600,000		171,600,000
2022 Vehicle Floorplan Facility | Line Of Credit
Accounting Policies [Line Items]
Increased borrowing capacity									$ 500,000,000.0
Line of credit facility, unutilized borrowing capacity				$ 39,100		$ 39,100