CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Redeemable Noncontrolling Interests	Total ANGI Homeservices Inc. Shareholders' Equity	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Common Stock Class C Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2018		$ 18,163
Increase (Decrease) in Redeemable Noncontrolling Interests
Net earnings		284
Other comprehensive loss		(514)
Stock-based compensation expense		113
Purchase of redeemable noncontrolling interests		(71)
Adjustment of redeemable noncontrolling interests to fair value		4,024
Balance at end of period at Sep. 30, 2019		21,999
Balance at beginning of period at Dec. 31, 2018	$ 1,321,987		$ 1,312,941	$ 81	$ 421	$ 0	$ 1,333,097	$ (18,797)	$ (1,861)	$ 0	$ 9,046
Balance at beginning of period (shares) at Dec. 31, 2018				80,515	421,118	0
Increase (Decrease) in Shareholders' Equity
Net earnings	35,125		34,936					34,936			189
Other comprehensive loss	(2,369)		(2,302)						(2,302)		(67)
Stock-based compensation expense	45,473		45,473				45,473
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(27,800)		(27,800)	$ 5			(27,805)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				5,560
Issuance of common stock to IAC pursuant to the employee matters agreement	(1,765)		(1,765)		$ 1		(1,766)
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)					452
Purchase of treasury stock	(34,157)		(34,157)							(34,157)
Adjustment of redeemable noncontrolling interests to fair value	(4,024)		(4,024)				(4,024)
Other	(19)		(19)				(19)
Balance at end of period at Sep. 30, 2019	1,332,451		1,323,283	$ 86	$ 422	$ 0	1,344,956	16,139	(4,163)	(34,157)	9,168
Balance at end of period (shares) at Sep. 30, 2019				86,075	421,570	0
Balance at beginning of period at Jun. 30, 2019		23,421
Increase (Decrease) in Redeemable Noncontrolling Interests
Net earnings		233
Other comprehensive loss		(365)
Stock-based compensation expense		36
Purchase of redeemable noncontrolling interests		(71)
Adjustment of redeemable noncontrolling interests to fair value		(1,255)
Balance at end of period at Sep. 30, 2019		21,999
Balance at beginning of period at Jun. 30, 2019	1,344,546		1,335,445	$ 86	$ 421	$ 0	1,338,280	(1,860)	(1,482)	0	9,101
Balance at beginning of period (shares) at Jun. 30, 2019				85,803	421,453	0
Increase (Decrease) in Shareholders' Equity
Net earnings	18,091		17,999					17,999			92
Other comprehensive loss	(2,706)		(2,681)						(2,681)		(25)
Stock-based compensation expense	8,748		8,748				8,748
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(2,357)		(2,357)	$ 0			(2,357)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				272
Issuance of common stock to IAC pursuant to the employee matters agreement	(970)		(970)		$ 1		(971)
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)					117
Purchase of treasury stock	(34,157)		(34,157)							(34,157)
Adjustment of redeemable noncontrolling interests to fair value	1,255		1,255				1,255
Other	1		1				1
Balance at end of period at Sep. 30, 2019	1,332,451		1,323,283	$ 86	$ 422	$ 0	1,344,956	16,139	(4,163)	(34,157)	9,168
Balance at end of period (shares) at Sep. 30, 2019				86,075	421,570	0
Balance at beginning of period at Dec. 31, 2019	26,663	26,663
Increase (Decrease) in Redeemable Noncontrolling Interests
Net earnings		383
Other comprehensive income, net of income taxes		233
Stock-based compensation expense		15
Purchase of redeemable noncontrolling interests		(3,165)
Adjustment of redeemable noncontrolling interests to fair value		1,645
Balance at end of period at Sep. 30, 2020	25,774	25,774
Balance at beginning of period at Dec. 31, 2019	1,323,552		1,314,288	$ 87	$ 422	$ 0	1,357,075	16,032	(1,379)	(57,949)	9,264
Balance at beginning of period (shares) at Dec. 31, 2019				87,007	421,570	0
Increase (Decrease) in Shareholders' Equity
Net earnings	8,847		8,181					8,181			666
Other comprehensive income, net of income taxes	738		394						394		344
Stock-based compensation expense	54,664		54,664				54,664
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(48,609)		(48,609)	$ 6			(48,615)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				5,653
Issuance of common stock to IAC pursuant to the employee matters agreement	(1,423)		(1,423)				(1,423)
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)					289
Purchase of treasury stock	(54,859)		(54,859)							(54,859)
Adjustment of redeemable noncontrolling interests to fair value	(1,645)		(1,645)				(1,645)
Purchase of noncontrolling interests	(1,115)										(1,115)
Adjustment pursuant to the tax sharing agreement	3,613		3,613				3,613
Other	(2)		(692)				(692)				690
Balance at end of period at Sep. 30, 2020	1,283,761		1,273,912	$ 93	$ 422	$ 0	1,362,977	24,213	(985)	(112,808)	9,849
Balance at end of period (shares) at Sep. 30, 2020				92,660	421,859	0
Balance at beginning of period at Jun. 30, 2020		25,093
Increase (Decrease) in Redeemable Noncontrolling Interests
Net earnings		438
Other comprehensive income, net of income taxes		920
Stock-based compensation expense		0
Adjustment of redeemable noncontrolling interests to fair value		(677)
Balance at end of period at Sep. 30, 2020	25,774	$ 25,774
Balance at beginning of period at Jun. 30, 2020	1,301,926		1,292,322	$ 89	$ 422	$ 0	1,387,618	19,741	(2,740)	(112,808)	9,604
Balance at beginning of period (shares) at Jun. 30, 2020				89,076	421,757	0
Increase (Decrease) in Shareholders' Equity
Net earnings	4,765		4,472					4,472			293
Other comprehensive income, net of income taxes	2,133		1,755						1,755		378
Stock-based compensation expense	13,846		13,846				13,846
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(37,838)		(37,838)	$ 4			(37,842)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				3,584
Issuance of common stock to IAC pursuant to the employee matters agreement	(632)		(632)				(632)
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)					102
Adjustment of redeemable noncontrolling interests to fair value	677		677				677
Purchase of noncontrolling interests	(1,115)										(1,115)
Other	(1)		(690)				(690)				689
Balance at end of period at Sep. 30, 2020	$ 1,283,761		$ 1,273,912	$ 93	$ 422	$ 0	$ 1,362,977	$ 24,213	$ (985)	$ (112,808)	$ 9,849
Balance at end of period (shares) at Sep. 30, 2020				92,660	421,859	0