Acquisitions - General Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2023 location	Sep. 30, 2023 USD ($) location	Sep. 30, 2022 USD ($) location
Acquisitions
Real properties purchased		$ 69.5	$ 41.7
Assumption of related promissory note		5.2
RV Dealership Groups | Forecast
Acquisitions
Number of locations acquired | location	12
RV and Outdoor Retail | RV Dealership Groups
Acquisitions
Cash paid for acquisition		$ 150.5	$ 79.8
Number of locations acquired | location		15	5
Number of locations to be open after current reporting period | location		3
Good Sam Services and Plans | Outdoor Publication
Acquisitions
Cash paid for acquisition			$ 3.4