Summary of Significant Accounting Policies - Services Provided to Marketing Funds by RE/MAX Franchising (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Cost charges	$ 3,532	$ 10,209
Marketing funds | Technology development - operating
Cost charges	1,523	3,687
Marketing funds | Technology development - capital
Cost charges	1,420	3,884
Marketing funds | Marketing staff and administrative services
Cost charges	$ 589	$ 2,638