Summary of Significant Accounting Policies - Services Provided to Marketing Funds by RE/MAX Franchising (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Cost charges	$ 3,752	$ 6,677
Marketing funds | Technology development - operating
Cost charges	1,199	2,164
Marketing funds | Technology development - capital
Cost charges	1,529	2,464
Marketing funds | Marketing staff and administrative services
Cost charges	$ 1,024	$ 2,049