Segment Information - Summary of Total Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Segment Total Assets [Line Items]
Total assets	$ 542,352	$ 428,373
RE/MAX Franchising
Segment Total Assets [Line Items]
Total assets	479,370	406,643
Marketing Funds fees
Segment Total Assets [Line Items]
Total assets	41,090
Motto Franchising
Segment Total Assets [Line Items]
Total assets	20,161	21,346
Other
Segment Total Assets [Line Items]
Total assets	$ 1,731	$ 384