Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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

Liabilities - Convertible Senior Notes Carrying Value (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Nov. 17, 2020	May 18, 2020	Jan. 10, 2017
Debt
Principal amount	$ 277,673	$ 277,673
Unamortized debt discount/transaction costs	(3,257)	(48,235)
Net carrying value	274,416	229,438
2023 Notes
Debt
Principal amount	20,173	20,173			$ 345,000
Unamortized debt discount/transaction costs	(29)	(967)
Net carrying value	20,144	19,206
2025 Notes
Debt
Principal amount	132,500	132,500	$ 132,500
Unamortized debt discount/transaction costs	(1,105)	(17,302)
Net carrying value	131,395	115,198
2027 Notes
Debt
Principal amount	125,000	125,000		$ 125,000
Unamortized debt discount/transaction costs	(2,123)	(29,966)
Net carrying value	$ 122,877	$ 95,034