Long-Term Debt - Notes Payable (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 0	$ (119)
Convertible notes payable	0	324,881
Unamortized debt issuance costs and discount	(8,393)	(8,784)
Total non-current convertible notes payable	$ 166,857	166,466
3.75% Convertible notes due 2023
Debt Instrument [Line Items]
Coupon interest rate	3.75%
3.75% Convertible notes due 2023 \| Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount, current	$ 0	325,000
Repayments of debt	$ 325,000
5.00% Convertible notes due 2027
Debt Instrument [Line Items]
Coupon interest rate	5.00%
5.00% Convertible notes due 2027 \| Unsecured Debt
Debt Instrument [Line Items]
Aggregate principal amount of notes issued	$ 175,250	$ 175,250

Debt Instrument, Face Amount, Current

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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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Carrying value as of the balance sheet date of the portion of long-term debt due within one year or the operating cycle if longer identified as Convertible Notes Payable. 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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Face (par) amount of debt instrument at time of issuance.

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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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Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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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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