DEBT - Convertible Senior Notes (Details) $ / shares in Units, $ in Thousands			1 Months Ended		3 Months Ended	12 Months Ended
	Mar. 07, 2022 USD ($)	Aug. 07, 2017 USD ($) $ / shares	Jul. 31, 2014 $ / shares $ / Item	Jan. 31, 2013 USD ($) $ / shares $ / Item	Mar. 31, 2022 USD ($) $ / shares $ / Item	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 18, 2022 USD ($)	Jan. 01, 2022	Aug. 01, 2017 $ / shares	Dec. 31, 2016 USD ($)
Debt
Payment for repurchase of debt instrument						$ 96,204	$ 165,131	$ 0
Liability component
Principal						453,500	549,704
Debt discount and issuance costs, net						(7,266)	(9,331)
2023 Notes
Debt
Convertible notes Face Value						$ 96,200
2025 Notes
Debt
Common stock price to current conversion price ratio						130.00%
Average trading price percentage						98.00%
Effective interest rate						8.87%
Total issuance costs						$ 5,400
Liability issuance costs						3,500
Equity issuance costs						1,900
2025 Notes | ASU 2020-06
Debt
Unamortized Debt discount						$ 67,300
Effective interest rate										2.88%
2025 Notes | Common stock
Debt
Share Price | $ / shares											$ 13.28
2028 Notes
Debt
Debt instrument, covenant terms description						The indenture governing the 2028 Notes contains customary terms and covenants, including a merger covenant and that upon certain events of default occurring and continuing, either the Trustee or the holders of at least 25% of the aggregate principal amount of the outstanding Notes may declare 100% of the principal of, and accrued and unpaid interest, if any, on, all the Notes to be due and payable immediately.
Convertible senior notes | 2025 Notes
Debt
Ratio of repurchase price to the principal amount						100.00%
Effective interest rate										2.88%
Liability component
Principal						$ 192,500	192,500
Debt discount and issuance costs, net						(1,205)	(1,917)
Net carrying amount						191,295	190,583
Interest expense
Contractual interest expense						4,813	4,813	4,813
Amortization of debt issuance costs						712	692	657
Amortization of debt discount						0	0	7,898
Total interest and amortization expense						$ 5,525	5,505	13,368
Convertible senior notes | 2025 Notes | Over-Allotment Option
Debt
Convertible notes Face Value		$ 17,500
Portion of debt instrument face amount, Exercised		17,500
Convertible senior notes | 2025 Notes | Private Placement
Debt
Convertible notes Face Value		$ 192,500
Debt Instrument, annual interest rate		2.50%
Convertible senior notes | 2025 Notes | Common stock
Debt
Conversion rate for shares of common stock per $1,000 principal		57.924
Conversion price (dollars per share) | $ / shares		$ 17.26				$ 17.26
Debt instrument maturity date		Aug. 15, 2025
Conversion premium (as a percent)		30.00%
Convertible senior notes | 2028 Notes
Debt
Convertible notes Face Value					$ 261,000
Debt instrument maturity date					Mar. 15, 2028
Proceeds from issuance of convertible notes, net of issuance costs					$ 252,600
Common stock price to current conversion price ratio					130.00%
Average trading price percentage					98.00%
Ratio of repurchase price to the principal amount					100.00%
Effective interest rate						2.70%
Liability component
Principal						$ 261,000	261,000
Debt discount and issuance costs, net						(6,061)	(7,403)
Net carrying amount						254,939	253,597
Interest expense
Contractual interest expense						5,546	4,514
Amortization of debt issuance costs						1,342	1,061
Total interest and amortization expense						6,888	5,575
Convertible senior notes | 2028 Notes | Privately-negotiated capped call option
Debt
Cap price for the underlying number of shares (in dollars per share) | $ / Item					33.985
Purchases of capped calls in connection with convertible senior notes due 2028					$ 21,000
Convertible senior notes | 2028 Notes | Over-Allotment Option
Debt
Convertible notes Face Value					45,000
Portion of debt instrument face amount, Exercised					$ 36,000
Convertible senior notes | 2028 Notes | Private Placement
Debt
Debt Instrument, annual interest rate					2.125%
Convertible senior notes | 2028 Notes | Common stock
Debt
Conversion rate for shares of common stock per $1,000 principal					38.1432
Conversion price (dollars per share) | $ / shares					$ 26.22
Convertible subordinated notes | 2023 Notes
Debt
Convertible notes Face Value				$ 287,500
Debt Instrument, annual interest rate				2.125%
Debt Instrument, Repurchased Face Amount	$ 144,800				$ 144,800							$ 14,100
Payment for repurchase of debt instrument	165,600				$ 165,600
Liability component
Principal	96,200					0	96,204		$ 96,200
Debt discount and issuance costs, net	$ (200)						(11)
Interest expense
Contractual interest expense						85	2,617	5,121
Amortization of debt issuance costs						11	302	580
Total interest and amortization expense						$ 96	$ 2,919	$ 5,701
Convertible subordinated notes | 2023 Notes | Privately-negotiated capped call option
Debt
Cap price for the underlying number of shares (in dollars per share) | $ / Item			27.04	38
Convertible subordinated notes | 2023 Notes | Common stock
Debt
Conversion rate for shares of common stock per $1,000 principal			50.5818	35.9903
Conversion price (dollars per share) | $ / shares			$ 19.77	$ 27.79