Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2020	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	$ 46,252
Intangible asset associated with benefit under the MSA
Finite-Lived Intangible Assets [Line Items]
Intangible assets impairment		$ 0
Trademark - Douglas Elliman
Finite-Lived Intangible Assets [Line Items]
Intangible assets impairment	$ (12,000)	$ 12,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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