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SEGMENT AND GEOGRAPHIC INFORMATION - Narrative (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2024 USD ($) segment reporting_unit	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment	4
Number of reportable segments \| segment	4
Number of reporting units \| reporting_unit	4
Segment Reporting Information [Line Items]
Goodwill	$ 2,310,730		$ 2,342,612	$ 2,348,366
Tinder
Segment Reporting Information [Line Items]
Goodwill		$ 1,500,000
Hinge
Segment Reporting Information [Line Items]
Goodwill		500,000
Evergreen & Emerging
Segment Reporting Information [Line Items]
Goodwill		200,000
MG Asia
Segment Reporting Information [Line Items]
Goodwill		$ 100,000