CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Match Group	Former IAC	Former Match Group and ANGI Homeservices	Redeemable Noncontrolling Interests	Total Match Group Shareholders’ Equity	Total Match Group Shareholders’ Equity Match Group	Total Match Group Shareholders’ Equity Former IAC	Total Match Group Shareholders’ Equity Former Match Group and ANGI Homeservices	Common Stock	Common Stock Match Group	Common Stock Common Stock $0.001 Par Value	Common Stock Common Stock $0.001 Par Value Match Group	Common Stock Former IAC Common Stock $0.001 Par Value	Common Stock Former IAC Common Stock $0.001 Par Value Former IAC	Common Stock Former IAC Class B Convertible Common Stock $0.001 Par Value	Additional Paid-in Capital	Additional Paid-in Capital Match Group	Additional Paid-in Capital Former IAC	Additional Paid-in Capital Former Match Group and ANGI Homeservices	Retained Deficit	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Former Match Group and ANGI Homeservices	Treasury Stock	Noncontrolling Interests	Noncontrolling Interests Former Match Group and ANGI Homeservices
Balance at beginning of period at Dec. 31, 2019					$ 44,527
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings	$ 59,680				(2,687)
Other comprehensive (loss) income, net of tax					(686)
Stock-based compensation expense					15
Purchase of redeemable noncontrolling interests					(3,165)
Adjustment of redeemable noncontrolling interests to fair value					7,820
Exchange Former IAC common stock and Class B common stock for Match Group common stock and completion of the Separation					(43,583)
Other					(1)
Balance at end of period at Sep. 30, 2020					2,240
Balance at beginning of period at Dec. 31, 2019	3,627,800					$ 2,657,524						$ 0		$ 263		$ 16	$ 11,378,160				$ 1,725,046	$ (136,349)		$ (10,309,612)	$ 970,276
Balance at beginning of period (shares) at Dec. 31, 2019												0		263,230		16,157
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	75,661					13,294															13,294				62,367
Other comprehensive (loss) income, net of tax	13,431					13,829																13,829			(398)
Stock-based compensation expense	198,179					111,816											111,816								86,363
Issuance of common stock pursuant to stock-based awards, net of withholding taxes		$ 83,225	$ (34,517)				$ 83,225	$ (34,517)					$ 5		$ 1			$ 83,220	$ (34,518)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)													4,803		453
Issuance of Class M common stock	0											$ 17					(17)
Issuance of Class M common stock (shares)												17,339
Issuance of Former Match Group and ANGI Homeservices common stock pursuant to stock-based awards, net of withholding taxes				$ (223,047)					$ (211,642)											$ (212,270)			$ 628			$ (11,405)
Adjustment of redeemable noncontrolling interests to fair value	(7,820)					(7,820)											(7,820)
Purchase of Match Group and ANGI treasury stock				$ (187,735)					$ (187,735)											$ (187,735)
Retirement of treasury stock	0													$ (184)		$ (10)	194				(10,309,612)			10,309,612
Retirement of treasury stock (shares)														(184,340)		(10,368)
Exchange Former IAC common stock and Class B common stock for Match Group common stock and completion of the Separation	(5,230,433)					(4,731,641)						$ 184		$ (80)		$ (6)	(4,745,520)					13,781			(498,792)
Exchange Former IAC common stock and Class B common stock for Match Group common stock and Separation (shares)												183,749		(79,343)		(5,789)
Acquire Former Match Group noncontrolling interest	0					608,168						$ 58					608,110								(608,168)
Acquire Former Match Group noncontrolling interest (shares)												57,868
Other	(2,511)					(2,641)											(2,641)								130
Balance at end of period at Sep. 30, 2020	(1,687,767)					(1,688,140)				$ 264		$ 264		$ 0		$ 0	6,990,979				(8,571,272)	(108,111)		0	373
Balance at end of period (shares) at Sep. 30, 2020										263,759		263,759		0		0
Balance at beginning of period at Jun. 30, 2020					(156)
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings	(586)				(617)
Adjustment of redeemable noncontrolling interests to fair value					3,013
Balance at end of period at Sep. 30, 2020					2,240
Balance at beginning of period at Jun. 30, 2020	(1,961,670)					(1,962,007)				$ 242							6,874,542				(8,712,479)	(124,312)			337
Balance at beginning of period (shares) at Jun. 30, 2020										241,617
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	141,238					141,207															141,207				31
Other comprehensive (loss) income, net of tax	16,206					16,201																16,201			5
Stock-based compensation expense	38,757					38,757											38,757
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	83,225					83,225				$ 5							83,220
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)										4,803
Issuance of Class M common stock	0									$ 17							(17)
Issuance of Class M common stock (shares)										17,339
Adjustment of redeemable noncontrolling interests to fair value	(3,013)					(3,013)											(3,013)
Other	(2,510)					(2,510)											(2,510)
Balance at end of period at Sep. 30, 2020	(1,687,767)					(1,688,140)				$ 264		$ 264		$ 0		$ 0	6,990,979				(8,571,272)	(108,111)		$ 0	373
Balance at end of period (shares) at Sep. 30, 2020										263,759		263,759		0		0
Balance at beginning of period at Dec. 31, 2020	640				640
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings	(1,077)				(1,485)
Adjustment of redeemable noncontrolling interests to fair value					2,185
Balance at end of period at Sep. 30, 2021	1,340				1,340
Balance at beginning of period at Dec. 31, 2020	(1,413,375)					(1,414,417)				$ 267							7,089,007				(8,422,237)	(81,454)			1,042
Balance at beginning of period (shares) at Dec. 31, 2020										267,329
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	446,763					446,355															446,355				408
Other comprehensive (loss) income, net of tax	(122,066)					(121,943)																(121,943)			(123)
Stock-based compensation expense	117,735					117,735											117,735
Issuance of common stock pursuant to stock-based awards, net of withholding taxes		$ 30,179					$ 30,179				$ 4							$ 30,175
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)											4,021
Unwind of notes hedges and warrants	198,365					198,365											198,365
Exchangeable note obligation	(201,824)					(201,824)											(201,824)
Issuance of common stock for the acquisition of Hyperconnect	890,851					890,851				$ 6							890,845
Issuance of common stock for the acquisition of Hyperconnect (shares)										5,929
Adjustment of redeemable noncontrolling interests to fair value	(2,185)					(2,185)											(2,185)
Adjustment of noncontrolling interests to fair value	0					(1,835)											(1,835)								1,835
Purchase of noncontrolling interest	(1,628)					943											943								(2,571)
Noncontrolling interest created by the exercise of subsidiary denominated equity awards	151					(7,102)											(7,102)								7,253
Other	(3,782)					(3,474)											(3,474)								(308)
Balance at end of period at Sep. 30, 2021	(60,816)					(68,352)				$ 277							8,110,650				(7,975,882)	(203,397)			7,536
Balance at end of period (shares) at Sep. 30, 2021										277,279
Balance at beginning of period at Jun. 30, 2021					1,240
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings	(309)				(550)
Adjustment of redeemable noncontrolling interests to fair value					650
Balance at end of period at Sep. 30, 2021	1,340				$ 1,340
Balance at beginning of period at Jun. 30, 2021	(135,088)					(142,245)				$ 277							8,068,659				(8,107,092)	(104,089)			7,157
Balance at beginning of period (shares) at Jun. 30, 2021										276,653
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	131,451					131,210															131,210				241
Other comprehensive (loss) income, net of tax	(99,321)					(99,308)																(99,308)			(13)
Stock-based compensation expense	41,648					41,648											41,648
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	4,201					4,201											4,201
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)										626
Unwind of notes hedges and warrants	198,365					198,365											198,365
Exchangeable note obligation	(201,824)					(201,824)											(201,824)
Adjustment of redeemable noncontrolling interests to fair value	(650)					(650)											(650)
Noncontrolling interest created by the exercise of subsidiary denominated equity awards	151																								151
Other	251					251											251
Balance at end of period at Sep. 30, 2021	$ (60,816)					$ (68,352)				$ 277							$ 8,110,650				$ (7,975,882)	$ (203,397)			$ 7,536
Balance at end of period (shares) at Sep. 30, 2021										277,279