Summary of Significant Accounting Policies - Disaggregated revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 71,541	$ 54,866	$ 214,100	$ 161,785
Owned Regions
Disaggregation of Revenue [Line Items]
Total revenue	33,941	35,138	97,978	102,193
Independent Regions
Disaggregation of Revenue [Line Items]
Total revenue	11,211	11,904	33,528	34,747
Global and Other
Disaggregation of Revenue [Line Items]
Total revenue	5,929	5,408	19,784	19,214
RE/MAX Franchising
Disaggregation of Revenue [Line Items]
Total revenue	51,081	52,450	151,290	156,154
Total Marketing Funds
Disaggregation of Revenue [Line Items]
Total revenue	18,034	0	54,866	0
Other
Disaggregation of Revenue [Line Items]
Total revenue	2,426	2,416	7,944	5,631
U.S. | RE/MAX Franchising
Disaggregation of Revenue [Line Items]
Total revenue	42,013	43,689	125,437	130,384
U.S. | Total Marketing Funds
Disaggregation of Revenue [Line Items]
Total revenue	16,163	0	49,216	0
Canada | RE/MAX Franchising
Disaggregation of Revenue [Line Items]
Total revenue	5,886	6,170	17,128	18,146
Canada | Total Marketing Funds
Disaggregation of Revenue [Line Items]
Total revenue	1,644	0	5,029	0
Global | RE/MAX Franchising
Disaggregation of Revenue [Line Items]
Total revenue	3,182	2,591	8,725	7,624
Global | Total Marketing Funds
Disaggregation of Revenue [Line Items]
Total revenue	$ 227	$ 0	$ 621	$ 0