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DEBT (Tables)
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Debt
The following table provides information regarding the Company’s debt:
September 30,
2022		December 31,
2021
(In thousands)
Convertible notes
Notes due 2028$575,000 $575,000 
Less: unamortized debt discount— (143,636)
Less: unamortized debt issuance costs(7,032)(5,775)
Carrying amount of Notes due 2028 (1)
567,968 425,589 
Notes due 2026632,500 632,500 
Less: unamortized debt discount— (104,755)
Less: unamortized debt issuance costs(6,809)(6,678)
Carrying amount of Notes due 2026 (1)
625,691 521,067 
Notes due 2025102,175 102,175 
Less: unamortized debt discount(11,344)(14,584)
Less: unamortized debt issuance costs(1,177)(1,539)
Carrying amount of Notes due 202589,654 86,052 
Notes due 20235,000 5,000 
Less: unamortized issuance costs(32)(62)
Carrying amount of Notes due 20234,968 4,938 
Total carrying amount of debt1,288,281 1,037,646 
Less: current portion of convertible notes(89,654)(86,052)
Debt, non-current$1,198,627 $951,594 
(1)    The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU 2020-06. Refer to Note 1, Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.
The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2028:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
(In thousands)
Amortization of debt discount$— $4,929 $— $11,412 
Amortization of debt issuance costs327 235 969 550 
Total interest cost recognized$327 $5,164 $969 $11,962 
The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2026:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
(In thousands)
Amortization of debt discount$— $5,650 $— $13,023 
Amortization of debt issuance costs502 404 1,489 943 
Total interest cost recognized$502 $6,054 $1,489 $13,966 
The following table presents the total amount of interest cost recognized relating to the Notes due 2025:

Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
(In thousands)
Contractual interest expense$64 $64 $192 $278 
Amortization of debt discount1,103 1,047 3,239 4,469 
Amortization of debt issuance costs122 123 363 539 
Total interest cost recognized$1,289 $1,234 $3,794 $5,286 
The following table presents the amount of interest cost recognized relating to the contractual interest coupon and the amortization of debt issuance costs of the Notes due 2023:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
(In thousands)
Contractual interest expense$50 $50 $150 $150 
Amortization of debt issuance costs10 10 30 30 
Total interest costs recognized$60 $60 $180 $180