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Convertible Senior Notes - Summary of Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Amortization of discount		$ 9,195	$ 0
Amortization of debt issuance costs		1,707	$ 482
Convertible Senior Notes | Convertible Debt
Debt Instrument [Line Items]
Contractual coupon interest	$ 359	719
Amortization of discount	4,624	9,195
Amortization of debt issuance costs	$ 583	$ 1,158

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