Income Taxes - Additional Information (Details) $ in Millions	3 Months Ended
Jun. 30, 2021 USD ($)
Income Taxes
Reduction to income tax expense including interest and penalties due to settlement of uncertain tax position	$ 1.4

Amount of the reduction to income tax expense, including interest and penalties, due to the settlement of an uncertain tax position.

No definition available.

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Namespace Prefix:	rmax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration