Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) Facility	Dec. 31, 2022 USD ($)	Feb. 29, 2024 USD ($)	Dec. 31, 2021 USD ($)
Accounting Policies [Line Items]
Other comprehensive income (loss)	$ 0	$ 0
Allowance for doubtful accounts	11,200,000	21,500,000		$ 8,500,000
Provision for bad debt	4,074,000	13,406,000
Write-offs	14,400,000
Cash deposits included in restricted cash	73,234,000	73,095,000
Valuation allowance for finance receivables classified as held for sale	33,800,000	10,500,000
Cash and cash equivalents	135,585,000	398,915,000	$ 94,000,000
Payment for severance related benefits	16,500,000
Payment for early contract and lease termination costs	15,000,000
Restricted Cash	$ 73,200,000
Business combination, measurement period	1 year
Outstanding borrowings percentage in cash	40.00%
ASU 2019-12
Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
ASU 2020-06
Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	true
ASU 2021-08
Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2023
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
Maximum
Accounting Policies [Line Items]
Amortization term	10 years
Minimum
Accounting Policies [Line Items]
Amortization term	1 year
Warehouse Credit Facility
Accounting Policies [Line Items]
Cash deposits included in restricted cash	$ 20,688,000	15,654,000
Increased borrowing capacity	56,900,000	105,800,000
Selling, General and Administrative Expenses
Accounting Policies [Line Items]
Advertising expense	48,400,000	79,700,000
Selling, General and Administrative Expenses | Shipping and Handling
Accounting Policies [Line Items]
Shipping and handling expenses	$ 8,500,000	$ 39,000,000
UACC
Accounting Policies [Line Items]
Number of warehouse credit facilities | Facility	4
UACC | Warehouse Credit Facility
Accounting Policies [Line Items]
Cash deposits included in restricted cash	$ 49,100,000
Aggregate borrowing limit	825,000,000
Increased borrowing capacity	56,900,000
Outstanding borrowings	421,300,000
2022 Vehicle Floorplan Facility
Accounting Policies [Line Items]
Cash deposits included in restricted cash	$ 22,700,000