Borrowings - Balances of Liability and Equity Components (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt outstanding	$ 2,558,251	$ 2,847,002
Convertible Senior Notes
Debt Instrument [Line Items]
Debt outstanding	345,000	632,500
Less: Debt discount and issuance costs	(22,562)	(31,414)
Total	322,438	601,086
Equity component	$ 44,910	$ 76,216

Debt, Long-term and Short-term, Gross, Combined Amount

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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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.

+ References

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Amount, after accumulated amortization, of debt discount.

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- Definition

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

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