SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	$ (16,296)	$ (3,641)
Stock-based compensation expense	25,575	19,282
Depreciation	12,138	6,999
Amortization of intangibles	12,980	14,539
Interest expense—third party	(2,274)	(2,994)
Other income, net	421	2,271
Loss before income taxes	(18,149)	(4,364)
Income tax provision	8,965	14,215
Net (loss) earnings	(9,184)	9,851
Net loss attributable to noncontrolling interests	226	118
Net (loss) earnings attributable to ANGI Homeservices Inc. shareholders	(8,958)	9,969
North America
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(8,108)	742
Stock-based compensation expense	25,312	19,072
Depreciation	11,297	6,207
Amortization of intangibles	12,890	13,668
Adjusted EBITDA	41,391	39,689
Europe
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(8,188)	(4,383)
Stock-based compensation expense	263	210
Depreciation	841	792
Amortization of intangibles	90	871
Adjusted EBITDA	$ (6,994)	$ (2,510)