Summary of Significant Accounting Policies - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Annual dues
Disaggregation of Revenue [Line Items]
Deferred revenue recognition period		12 months
Balance at beginning of period		$ 15,877
New billings		18,828
Revenue recognized		(17,673)
Balance at the end of period	$ 17,032	17,032
Revenue recognized	4,500	11,400
Franchise sales revenue
Disaggregation of Revenue [Line Items]
Balance at beginning of period		27,560
New billings		3,283
Revenue recognized		4,697
Balance at the end of period	26,146	26,146
Revenue recognized	$ 2,100	$ 4,400
Franchise sales revenue | RE/MAX franchise agreements
Disaggregation of Revenue [Line Items]
Period of franchise agreement		5 years
Franchise sales revenue | Motto franchise agreements
Disaggregation of Revenue [Line Items]
Period of franchise agreement		7 years