DISCONTINUED OPERATIONS - Components of Income from Discontinued Operations (Details) - IAC/InterActiveCorp - Discontinued Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 0	$ 1,410,485	$ 2,705,797
Operating costs and expenses	0	(1,840,178)	(2,769,918)
Operating loss	0	(429,693)	(64,121)
Interest expense	0	(3,772)	(12,993)
Other (expense) income	0	(2,503)	68,767
Income tax benefit	509	69,898	57,534
Earnings (loss) from discontinued operations	$ 509	$ (366,070)	$ 49,187