Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Fair Value of Financial Instruments - Narrative (Details) - Convertible notes - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 04, 2018
Debt Instrument [Line Items]
Outstanding principal		$ 171,500	$ 171,500
2.50% Convertible Notes due 2023
Debt Instrument [Line Items]
Outstanding principal	$ 120,500	171,500		$ 116,600
Fair value	$ 89,400	$ 98,700