Summary of Significant Accounting Policies - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred Revenue Arrangement [Line Items]
New billings	$ (259)	$ (3,482)	$ 254
RE/MAX franchise agreements
Deferred Revenue Arrangement [Line Items]
Period of franchise agreement	5 years
Motto franchise agreements
Deferred Revenue Arrangement [Line Items]
Period of franchise agreement	7 years
Annual dues
Deferred Revenue Arrangement [Line Items]
Deferred revenue recognition period	12 months
Balance at beginning of period	$ 15,297
New billings	36,474
Revenue recognized	(35,894)
Balance at the end of period	15,877	15,297
Revenue recognized	14,000
Franchise sales revenue
Deferred Revenue Arrangement [Line Items]
Balance at beginning of period	27,943
New billings	8,732
Revenue recognized	(9,115)
Balance at the end of period	27,560	$ 27,943
Revenue recognized	$ 7,400
Franchise sales revenue | RE/MAX franchise agreements
Deferred Revenue Arrangement [Line Items]
Period of franchise agreement	5 years
Franchise sales revenue | Motto franchise agreements
Deferred Revenue Arrangement [Line Items]
Period of franchise agreement	7 years