Debt - Summary of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Amortization of debt discount	$ 11,701	$ 11,259	$ 11,917
Convertible Note Due 2023 | Senior Notes
Short-term Debt [Line Items]
Contractual interest expense	6,325	6,325	6,325
Amortization of debt discount	9,586	9,083	8,606
Total	$ 15,911	$ 15,408	$ 14,931
Effective interest rate	5.45%