Fair Value of Financial Instruments (Details 2) - 1.375% Convertible senior notes due 2023 - Convertible senior notes - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt instrument
Face value	$ 172,500	$ 172,500
Carrying value	163,687	156,031
Fair Value	$ 254,103	$ 194,709

Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant