RELATED PARTY TRANSACTIONS WITH IAC - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Taxes	$ 7,483	$ 49,106	$ (11,834)
Net increase in IAC’s investment in HomeAdvisor		46,339	10,300
IAC
Related Party Transaction [Line Items]
Cash transfers from IAC related to its centrally managed U.S. treasury management function, acquisitions and cash expenses paid by IAC on behalf of HomeAdvisor, net		(80,368)	(363)
Taxes		38,162	(5,968)
Interest income, net		656	278
Allocation of general and administrative expense		(4,789)	(4,247)
Net increase in IAC’s investment in HomeAdvisor		$ (46,339)	$ (10,300)