DEBT - Convertible Senior Notes (Details)					3 Months Ended	12 Months Ended
	Jul. 24, 2020 USD ($) day $ / shares shares	May 31, 2017 USD ($) $ / shares shares	May 31, 2017 USD ($) day $ / shares shares	May 31, 2017 USD ($) segment $ / shares shares	Sep. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount						$ 30,695,000	$ 19,570,000	$ 12,016,000
Amortization of debt issuance costs						5,992,000	3,474,000	1,974,000
Repayments of convertible debt						0	233,862,000	0
Debt Issuance Costs, Net [Abstract]
Net carrying amount						$ 478,151,000	611,412,000
2025 Convertible Notes
Debt Instrument [Line Items]
Interest rate (percentage)						0.50%
Conversion rate, number of shares per $1,000 of principal | shares	2.1683
Conversion price (in dollars per share) | $ / shares	$ 461.19
Threshold percentage of stock price trigger	130.00%
Redemption percentage	100.00%
Nonconvertible debt borrowing rate at the date of issuance (percentage)	5.30%
Convertible debt, noncurrent	$ 455,600,000
Carrying amount of debt, equity component	119,400,000
Debt issuance costs, gross	15,100,000
Debt issuance costs, liability component	12,000,000					$ 8,855,000	11,056,000
Debt issuance costs, equity component	$ 3,100,000
Interest expense						27,200,000	11,500,000
Interest expense, excluding amortization						$ 2,900,000	1,300,000
Interest rate	0.50%					0.50%
Amortization of debt discount						$ 22,100,000	9,300,000
Amortization of debt issuance costs						2,200,000	900,000
Debt Issuance Costs, Net [Abstract]
Gross carrying amount						575,000,000	575,000,000
Unamortized debt discount						87,994,000	110,110,000
Debt issuance costs	$ 12,000,000					8,855,000	11,056,000
Net carrying amount						478,151,000	453,834,000
2025 Convertible Notes | Conversion option one
Debt Instrument [Line Items]
Threshold trading days | day	20
Threshold consecutive trading days | day	30
Threshold percentage of stock price trigger	130.00%
2025 Convertible Notes | Conversion option two
Debt Instrument [Line Items]
Threshold trading days | day	5
Threshold consecutive trading days | day	5
Threshold percentage of stock price trigger	98.00%
2025 Convertible Notes | Convertible Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 575,000,000
Interest rate (percentage)	0.50%
Long-term debt, fair value						$ 475,100,000
2025 Notes Under 13-day Purchase Option | Convertible Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 75,000,000
2022 Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 300,000,000	$ 300,000,000	$ 300,000,000
Interest rate (percentage)		0.625%	0.625%	0.625%		0.625%
Conversion rate, number of shares per $1,000 of principal | shares		4.8163	4.8163	4.8163
Conversion price (in dollars per share) | $ / shares		$ 207.63	$ 207.63	$ 207.63
Threshold percentage of stock price trigger		130.00%
Redemption percentage		100.00%
Nonconvertible debt borrowing rate at the date of issuance (percentage)		5.36%	5.36%	5.36%
Convertible debt, noncurrent		$ 238,400,000	$ 238,400,000	$ 238,400,000
Carrying amount of debt, equity component		61,600,000	61,600,000	61,600,000
Debt issuance costs, gross		9,300,000	9,300,000	9,300,000
Debt issuance costs, liability component		7,400,000	7,400,000	7,400,000		$ 391,000	1,297,000
Debt issuance costs, equity component		1,900,000	1,900,000	1,900,000
Interest expense						9,500,000	13,000,000	15,300,000
Interest expense, excluding amortization						$ 1,100,000	$ 1,500,000	$ 1,900,000
Interest rate						0.625%	0.625%	0.625%
Amortization of debt discount						$ 7,500,000	$ 10,300,000	$ 12,000,000
Amortization of debt issuance costs						900,000	1,200,000	$ 1,400,000
Long-term debt, fair value						167,300,000
Repayments of convertible debt	234,000,000
Repurchased face amount	130,300,000
Repurchased amount, accrued interest	100,000
Extinguishment of debt	126,000,000
Repurchase of convertible debt, reduction to additional paid-in capital	$ 107,900,000						107,882,000
Loss on extinguishment of debt					$ 7,800,000
Debt Issuance Costs, Net [Abstract]
Gross carrying amount						169,659,000	169,690,000
Unamortized debt discount						3,260,000	10,815,000
Debt issuance costs		$ 7,400,000	$ 7,400,000	$ 7,400,000		391,000	1,297,000
Net carrying amount						$ 166,008,000	$ 157,578,000
2022 Convertible Notes | Conversion option one
Debt Instrument [Line Items]
Threshold trading days | day			20
Threshold consecutive trading days			30	30
Threshold percentage of stock price trigger		130.00%
2022 Convertible Notes | Conversion option two
Debt Instrument [Line Items]
Threshold trading days | day			5
Threshold percentage of stock price trigger		98.00%