Long-term Debt - Carrying Amount of the 1.50% Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Less: Unamortized issuance costs	$ 2,700	$ 600
Net carrying amount of the liability component	160,488	165,759
1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Principal amount of the liability component	25,969	157,369
Less: Unamortized discount	0	12,308
Less: Unamortized issuance costs	167	1,819
Net carrying amount of the liability component	$ 25,802	143,242
Net carrying amount of the equity component		$ 25,683