Acquisitions and Dispositions - Additional Information (Details)					3 Months Ended	9 Months Ended		15 Months Ended
	Nov. 03, 2016 USD ($)	Jan. 20, 2016 facility	Dec. 31, 2015 item	Apr. 10, 2015 facility	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Mar. 31, 2016 item
Summary of dispositions
Number of brokerages having assets and liabilities sold | item								21
Gain (loss) on sale or disposition of assets						$ (85,000)	$ 606,000
RE/MAX Northwest Realtors
Summary of dispositions
Number of brokerages having assets and liabilities sold | facility		3
Gain (loss) on sale or disposition of assets						(90,000)
RE/MAX Equity Group
Summary of dispositions
Number of brokerages having assets and liabilities sold | item			12
Gain (loss) on sale or disposition of assets					$ 2,794,000
RE/MAX 100.
Summary of dispositions
Number of brokerages having assets and liabilities sold | facility				6
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | RE/MAX 100.
Summary of dispositions
Gain (loss) on sale or disposition of assets						$ 615,000
RE/MAX of New Jersey | Subsequent Event
Summary of dispositions
Cash generated from operations to fund the acquisition	$ 45,000,000