Long-term Debt - Schedule of Net Carrying Amount of Liability Component (Detail) $ in Thousands	Sep. 30, 2021 USD ($)
Convertible Debt
Debt Instrument [Line Items]
Outstanding principal amount	$ 1,700,000
Unamortized Issuance Costs	(34,602)
Net Carrying Value	1,665,398
Fair Value	1,830,697
Convertible Senior Notes due 2025 \| Convertible Debt
Debt Instrument [Line Items]
Outstanding principal amount	650,000
Unamortized Issuance Costs	(12,864)
Net Carrying Value	637,136
Fair Value	1,058,915
Convertible Senior Notes due 2027 \| Convertible Debt
Debt Instrument [Line Items]
Outstanding principal amount	1,050,000
Unamortized Issuance Costs	(21,738)
Net Carrying Value	1,028,262
Fair Value	771,782
Secured Notes Due Twenty Twenty Eight
Debt Instrument [Line Items]
Outstanding principal amount	500,000
Unamortized Issuance Costs	(12,364)
Fair Value	505,700
Net Carrying	$ 487,636

Outstanding principal balance of debt instrument at period end.

No definition available.

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- Definition

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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