Acquisitions - Goodwill, Revenue and Pre-Tax (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Assets Or Stock Of Multiple Dealership Locations Acquired [Member]
Acquisitions
Goodwill for tax purposes	$ 33.3	$ 23.7
Revenue	12.8	21.7
Pre-tax income (loss)	$ (1.1)	1.4
Good Sam Services and Plans \| Trademarks and trade names
Acquisitions
Intangible assets		$ 2.1
Useful lives (in years)		15 years
Good Sam Services and Plans \| Other intangible assets
Acquisitions
Intangible assets		$ 0.5
Useful lives (in years)		3 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

+ References

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-Topic 805
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- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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