Acquisitions - Re/Max Integra North America Purchase Price Allocation (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 21, 2021	Sep. 30, 2021	Dec. 31, 2020
Purchase Price Allocation
Goodwill		$ 268,390	$ 165,358
Loss on contract settlement		$ 40,500
RE/MAX INTEGRA North America Region Asset Acquisition
Purchase Price Allocation
Cash and cash equivalents and restricted cash	$ 14,098
Accounts and notes receivable, net	6,610
Income tax receivable	494
Other current assets	683
Property and equipment, net of accumulated depreciation	63
Other assets, net of current portion	1,930
Other assets	1,930
Goodwill	108,269
Accounts payable	(3,409)
Accrued liabilities	(14,012)
Income taxes payable	(2,900)
Deferred revenue	(824)
Deferred tax liabilities, net	(20,152)
Other liabilities, net of current portion	(1,900)
Total purchase price allocated to assets and liabilities	194,500
Loss on contract settlement	40,500
Total consideration	235,000
RE/MAX INTEGRA North America Region Asset Acquisition | Franchise agreements
Purchase Price Allocation
Other intangible assets, net	96,550
RE/MAX INTEGRA North America Region Asset Acquisition | Other intangible assets
Purchase Price Allocation
Other intangible assets, net	$ 9,000