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

Convertible Senior Notes (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	May 31, 2020	May 29, 2020	May 18, 2020
Convertible Senior Notes
Net carrying amount	$ 193,592	$ 192,633
3.75% Convertible Senior Notes
Convertible Senior Notes
Principal amount	197,278		$ 15,200	$ 212,500	$ 12,500	$ 200,000
Unamortized debt issuance costs	(3,686)
Net carrying amount	$ 193,592