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DEBT (Tables)
 6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Debt
The following table provides information regarding the Company’s debt:
June 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(7,359)(5,775)
Carrying amount of Notes due 2028 (1)
567,641 425,589 
Notes due 2026632,500 632,500 
Less: unamortized debt discount— (104,755)
Less: unamortized debt issuance costs(7,312)(6,678)
Carrying amount of Notes due 2026 (1)
625,188 521,067 
Notes due 2025102,175 102,175 
Less: unamortized debt discount(12,447)(14,584)
Less: unamortized debt issuance costs(1,299)(1,539)
Carrying amount of Notes due 202588,429 86,052 
Notes due 20235,000 5,000 
Less: unamortized issuance costs(43)(62)
Carrying amount of Notes due 20234,957 4,938 
Total carrying amount of debt1,286,215 1,037,646 
Less: current portion of convertible notes(88,429)(86,052)
Debt, non-current$1,197,786 $951,594 
(1)    The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.
The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2028:
Three Months Ended
June 30,		Six Months Ended
June 30,
2022202120222021
(In thousands)
Amortization of debt discount$— $4,872 $— $6,483 
Amortization of debt issuance costs327 236 643 315 
Total interest cost recognized$327 $5,108 $643 $6,798 
The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2026:
Three Months Ended
June 30,		Six Months Ended
June 30,
2022202120222021
(In thousands)
Amortization of debt discount$— $5,587 $— $7,373 
Amortization of debt issuance costs502 404 987 539 
Total interest cost recognized$502 $5,991 $987 $7,912 
The following table presents the total amount of interest cost recognized relating to the Notes due 2025:

Three Months Ended
June 30,		Six Months Ended
June 30,
2022202120222021
(In thousands)
Contractual interest expense$64 $64 $128 $214 
Amortization of debt discount1,088 1,033 2,137 3,422 
Amortization of debt issuance costs123 122 241 416 
Total interest cost recognized$1,275 $1,219 $2,506 $4,052 
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
June 30,		Six Months Ended
June 30,
2022202120222021
(In thousands)
Contractual interest expense$50 $50 $100 $100 
Amortization of debt issuance costs10 10 20 20 
Total interest costs recognized$60 $60 $120 $120