Summary of Significant Accounting Policies - Fair Value Methods Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
ROU asset impairment charges	$ 2,000
Impairment charges recorded on goodwill		$ 59,800	$ 0	$ 59,775	$ 0
Accu-Trade, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges recorded on goodwill		$ 59,800	$ 0	$ 59,800	$ 4,100