Notes Payable and Long-Term Debt, Summary of Notes Payable and Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Notes Payable and Long-Term Debt [Abstract]
Gross notes payable and long-term debt	$ 422,500	$ 422,500
Less deferred finance charges	(7,709)	(8,328)
Net notes payable and long-term debt	414,791	414,172
Senior Secured Notes [Member]
Notes Payable and Long-Term Debt [Abstract]
Gross notes payable and long-term debt	250,000	250,000
Convertible Senior Notes [Member]
Notes Payable and Long-Term Debt [Abstract]
Gross notes payable and long-term debt	$ 172,500	$ 172,500