Debt - Interest Expense of Convertible Notes (Details) - Convertible Senior Notes - Convertible Senior Notes Due 2024 - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Stated interest	$ 1,186	$ 1,186
Amortized debt discount	0	5,482
Amortized issuance costs	447	232
Interest expense	$ 1,633	$ 6,900

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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