SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Net Income for Purposes of Determining Basic and Diluted EPS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Net loss attributed to Douglas Elliman Inc.	$ (27,180)	$ (4,866)	$ (70,319)	$ (27,709)
Income attributable to participating securities, basic	0	0	0	(307)
Income attributable to participating securities, diluted	0	0	0	(307)
Net loss available to common stockholders attributed to Douglas Elliman Inc. - basic	(27,180)	(4,866)	(70,319)	(28,016)
Net loss available to common stockholders attributed to Douglas Elliman Inc. - diluted	$ (27,180)	$ (4,866)	$ (70,319)	$ (28,016)