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SEGMENT INFORMATION - Summary of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Sep. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
ROU asset, impairment charges			$ 100	$ 48,200
Charges Incurred					$ 80,200
Transaction-related costs					7,100
Meredith Corporation
Segment Reporting Information [Line Items]
ROU asset, impairment charges	$ 44,700	$ 14,300		44,700	14,300
Dotdash Meredith
Segment Reporting Information [Line Items]
Charges Incurred			130	3,674
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA			322,116	311,776	233,992
Operating Segments | Dotdash Meredith
Segment Reporting Information [Line Items]
Adjusted EBITDA			295,420	222,757	152,149
ROU asset, impairment charges				44,700
Transaction-related costs					1,400
Operating Segments | Dotdash Meredith | Meredith Corporation
Segment Reporting Information [Line Items]
Charges Incurred					32,200
Transaction-related costs					1,100
Operating Segments | Digital
Segment Reporting Information [Line Items]
Adjusted EBITDA			289,393	242,969	186,696
Charges Incurred			0	1,371
Operating Segments | Print
Segment Reporting Information [Line Items]
Adjusted EBITDA			53,793	64,226	31,135
Charges Incurred			94	1,625	33,400
Operating Segments | Care.com
Segment Reporting Information [Line Items]
Adjusted EBITDA			45,181	56,205	46,899
Operating Segments | Search
Segment Reporting Information [Line Items]
Adjusted EBITDA			17,510	44,283	83,486
Operating Segments | Emerging & Other
Segment Reporting Information [Line Items]
Adjusted EBITDA			(35,995)	(11,469)	(48,542)
Other
Segment Reporting Information [Line Items]
Adjusted EBITDA			(90,305)	(98,048)	(86,191)
Other | Dotdash Meredith
Segment Reporting Information [Line Items]
Adjusted EBITDA			(47,766)	(84,438)	(65,682)
Charges Incurred			$ 36	$ 678	7,600
Transaction-related costs					$ 4,700

X

- Definition

The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, and (ii) gains and losses recognized on changes in the fair value of contingent consideration arrangements. The Company believes this measure is useful for analysts and investors as this measure allows a more meaningful comparison between our performance and that of our competitors. Moreover, our management uses this measure internally to evaluate the performance of our business as a whole and our individual business segments, and this measure is one of the primary metrics by which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature, and we believe that by excluding these items, Adjusted EBITDA corresponds more closely to the cash operating income generated from our business, from which capital investments are made and debt is serviced. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of loss from impairment of right-of-use asset from operating lease.

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