SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)		12 Months Ended
	Oct. 01, 2022 USD ($)	Dec. 31, 2022 USD ($) unit app_store $ / shares shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Discontinued Operations
Cash received per share in transaction (USD per share) | $ / shares		$ 3.00
Capitalized Contract Costs
Amortization of capitalized contract costs		$ 622,500,000	$ 552,600,000
Contract assets		$ 38,200,000	41,700,000	$ 33,500,000
Number of app stores | app_store		2
Current deferred revenue		$ 252,718,000	262,131,000	239,100,000
Deferred revenue recognized		262,100,000	239,100,000
Non-current deferred revenue		$ 0	0
Cash equivalents:
Maturity period from date of purchase for cash and cash equivalents (in days, less than)		91 days
Property and Equipment
Property and equipment, net		$ 176,136,000	163,256,000
Goodwill and Indefinite-Lived Intangible Assets
Number of reporting units | unit		1
Impairment and amortization of intangibles		$ 366,257,000	28,559,000	7,525,000
Indefinite-lived intangible assets		84,300,000
Indefinite-lived intangible assets acquired	$ 49,900,000
Advertising Costs
Advertising expense		474,900,000	510,300,000	438,700,000
Foreign Currency Translation and Transaction Gains and Losses
Amount of gains (losses) reclassified to earnings				(168,000)
Redeemable Noncontrolling Interest
Impairment of Intangible Assets, Finite-Lived		$ 25,800,000
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Impairment and amortization of intangibles
Foreign Currency Translation Adjustment
Foreign Currency Translation and Transaction Gains and Losses
Amount of gains (losses) reclassified to earnings			0	(168,000)	$ 0
Redeemable Noncontrolling Interests
Redeemable Noncontrolling Interest
Temporary equity, accretion to redemption value		$ 1,401,000	2,700,000	6,700,000
Europe | Trade names
Goodwill and Indefinite-Lived Intangible Assets
Impairment of intangible asset				244,300,000
United States
Property and Equipment
Property and equipment, net		$ 142,297,000	$ 133,513,000
United States | Trade names
Goodwill and Indefinite-Lived Intangible Assets
Impairment of intangible asset				43,900,000
Impairment and amortization of intangibles				$ 5,500,000
Minimum
Capitalized Contract Costs
Subscription period		1 month
Minimum | Indefinite-lived Intangible Assets
Goodwill and Indefinite-Lived Intangible Assets
Royalty rate used for impairment assessment of indefinite-lived intangible assets (as a percent)		3.00%	5.00%
Minimum | Indefinite-lived Intangible Assets | Discount Rate
Goodwill and Indefinite-Lived Intangible Assets
Measurement input (as a percent)		0.12	0.10
Maximum
Capitalized Contract Costs
Subscription period		6 months
Maximum | Indefinite-lived Intangible Assets
Goodwill and Indefinite-Lived Intangible Assets
Royalty rate used for impairment assessment of indefinite-lived intangible assets (as a percent)		8.00%	8.00%
Maximum | Indefinite-lived Intangible Assets | Discount Rate
Goodwill and Indefinite-Lived Intangible Assets
Measurement input (as a percent)		0.16	0.16
Software and Software Development Costs
Property and Equipment
Property and equipment, net		$ 72,600,000	$ 53,500,000
Accounts Receivable | Customer Concentration Risk | App Store #1
Capitalized Contract Costs
Concentration risk (percent)		70.00%	67.00%
Accounts Receivable | Customer Concentration Risk | App Store #2
Capitalized Contract Costs
Concentration risk (percent)		12.00%	12.00%
New Match Common Stock
Discontinued Operations
Stock issued in transaction per parent company share (shares) | shares		1
Cash received per share in transaction (USD per share) | $ / shares		$ 3.00