Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Concentration of Credit Risk
Amount in excess of FDIC limits	$ 231.5	$ 47.4
Revenue
Number of past years	10 years	10 years
Amount of chargebacks included in the estimate of variable consideration	$ 65.4	$ 68.2
Lifetime memberships period	18 years
Advertising Expense
Advertising expenses	$ 127.0	$ 101.1	$ 150.7
Shipping and Handling Fees and Costs
Cost, Product and Service [Extensible Enumeration]	Shipping and handling	Shipping and handling	Shipping and handling
Contracts in Transit
Number of days for retail installment sales contracts funded after the initial approval of the retail installment sales contract by third party lender	10 days
Building and improvements
Property and Equipment, net
Property, Plant and Equipment, Useful Life	40 years
Minimum
Revenue
Stated period of time for insurance and service contracts	1 year
Minimum | Leasehold improvements
Property and Equipment, net
Property, Plant and Equipment, Useful Life	3 years
Minimum | Furniture and equipment
Property and Equipment, net
Property, Plant and Equipment, Useful Life	3 years
Minimum | Software
Property and Equipment, net
Property, Plant and Equipment, Useful Life	3 years
Maximum
Revenue
Stated period of time for insurance and service contracts	7 years
Maximum | Leasehold improvements
Property and Equipment, net
Property, Plant and Equipment, Useful Life	40 years
Maximum | Furniture and equipment
Property and Equipment, net
Property, Plant and Equipment, Useful Life	12 years
Maximum | Software
Property and Equipment, net
Property, Plant and Equipment, Useful Life	5 years
RV and Outdoor Retail | Shipping and handling
Shipping and Handling Fees and Costs
Cost of Goods and Services Sold	$ 2.9	$ 4.4	$ 7.2