Non-controlling Interest - Ownership of common units in RMCO (Details) - RMCO, LLC - shares	Mar. 31, 2018	Dec. 31, 2017
Shares [Abstract]
Non-controlling interest ownership of common units in RMCO	12,559,600	12,559,600
RE/MAX Holdings, Inc. outstanding Class A common stock (equal to RE/MAX Holdings, Inc. common units	17,733,302	17,696,991
Total number of common stock units	30,292,902	30,256,591
Ownership Percentage [Abstract]
Non-controlling interest ownership of common units in RMCO as a percentage	41.46%	41.51%
RE/MAX Holdings, Inc. outstanding Class A common stock (equal to RE/MAX Holdings, Inc. common units	58.54%	58.49%
Total percentage of common stock units	100.00%	100.00%

The noncontrolling interest in net assets of the subsidiary, in number of common stock units owned.

No definition available.

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The parent entity's interest in net assets of the subsidiary, in number of common stock units owned.

No definition available.

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No definition available.

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Aggregate percentage of subsidiary's common units outstanding.

No definition available.

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No definition available.

Number of common units of ownership outstanding of a limited liability company (LLC).

No definition available.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

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