Debt - Schedule of Outstanding Debt Obligations (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Net carrying amount of liability component	$ 659,198,000
Less: long-term debt maturing within one year	(36,514,000)	$ 0
Total long-term debt	$ 622,684,000	$ 0
Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate	1.50%
Net carrying amount of liability component	$ 560,194,000
Non-Revolving Loan
Debt Instrument [Line Items]
Net carrying amount of liability component	$ 85,251,000
Non-Revolving Loan \| Minimum
Debt Instrument [Line Items]
Interest rate	3.75%
Non-Revolving Loan \| Maximum
Debt Instrument [Line Items]
Interest rate	5.25%
Master Vehicle Loan
Debt Instrument [Line Items]
Net carrying amount of liability component	$ 13,753,000
Master Vehicle Loan \| Minimum
Debt Instrument [Line Items]
Interest rate	2.70%
Master Vehicle Loan \| Maximum
Debt Instrument [Line Items]
Interest rate	6.75%

Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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