STOCK-BASED COMPENSATION - Stock Options Outstanding and Exercisable (Details) shares in Thousands	6 Months Ended
Jun. 30, 2020 stockOption $ / shares shares
Options Outstanding
Outstanding at end of period (shares) \| shares	15,451
Weighted- Average Remaining Contractual Life in Years	5 years 6 months
Weighted-average exercise price (USD per share)	$ 19.52
Options Exercisable
Exercisable at end of period (shares) \| shares	12,078
Weighted- Average Remaining Contractual Life in Years	5 years 1 month 6 days
Weighted-average exercise price (USD per share)	$ 19.51
IAC/InterActiveCorp
Options Exercisable
Number of stock options issued upon Separation per former stock option exchanged \| stockOption	1
Match Group
Options Exercisable
Number of stock options issued upon Separation per former stock option exchanged \| stockOption	2.1584
$0.01 to $10.00
Information about stock options outstanding and exercisable
Range of exercise prices, lower limit (USD per share)	$ 0.01
Range of exercise prices, upper limit (USD per share)	$ 10.00
Options Outstanding
Outstanding at end of period (shares) \| shares	1,317
Weighted- Average Remaining Contractual Life in Years	5 years 9 months 18 days
Weighted-average exercise price (USD per share)	$ 8.59
Options Exercisable
Exercisable at end of period (shares) \| shares	1,075
Weighted- Average Remaining Contractual Life in Years	5 years 8 months 12 days
Weighted-average exercise price (USD per share)	$ 8.52
$10.01 to $20.00
Information about stock options outstanding and exercisable
Range of exercise prices, lower limit (USD per share)	10.01
Range of exercise prices, upper limit (USD per share)	$ 20.00
Options Outstanding
Outstanding at end of period (shares) \| shares	5,964
Weighted- Average Remaining Contractual Life in Years	5 years
Weighted-average exercise price (USD per share)	$ 14.70
Options Exercisable
Exercisable at end of period (shares) \| shares	4,362
Weighted- Average Remaining Contractual Life in Years	4 years 4 months 24 days
Weighted-average exercise price (USD per share)	$ 14.27
$20.01 to $30.00
Information about stock options outstanding and exercisable
Range of exercise prices, lower limit (USD per share)	20.01
Range of exercise prices, upper limit (USD per share)	$ 30.00
Options Outstanding
Outstanding at end of period (shares) \| shares	7,815
Weighted- Average Remaining Contractual Life in Years	5 years 9 months 18 days
Weighted-average exercise price (USD per share)	$ 24.02
Options Exercisable
Exercisable at end of period (shares) \| shares	6,438
Weighted- Average Remaining Contractual Life in Years	5 years 6 months
Weighted-average exercise price (USD per share)	$ 24.05
$30.01 to $50.00
Information about stock options outstanding and exercisable
Range of exercise prices, lower limit (USD per share)	30.01
Range of exercise prices, upper limit (USD per share)	$ 50.00
Options Outstanding
Outstanding at end of period (shares) \| shares	355
Weighted- Average Remaining Contractual Life in Years	7 years 7 months 6 days
Weighted-average exercise price (USD per share)	$ 41.84
Options Exercisable
Exercisable at end of period (shares) \| shares	203
Weighted- Average Remaining Contractual Life in Years	7 years 6 months
Weighted-average exercise price (USD per share)	$ 46.39

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Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options Exercisable

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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