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Long-Term Debt - Convertible Senior Notes Due 2023 (Details)
3 Months Ended
Mar. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
Debt Instrument [Line Items]    
Interest expense $ 4,869,000 $ 5,307,000
Amortization of debt issuance costs $ 596,000 590,000
2023 Notes (mature September 2023)    
Debt Instrument [Line Items]    
Interest rate (as a percent) 4.125%  
Frequency of periodic payment semi-annually  
Maturity date Sep. 15, 2023  
Initial conversion ratio 0.1056133  
Aggregate number of shares | shares 3,168,399  
Initial conversion price per share (USD per share) | $ / shares $ 9.47  
Increase in the conversion rate 0.0475260  
Redemption price as a percentage of principal amount 100.00%  
Effective interest rate (as a percent) 4.80%  
Interest expense $ 400,000 400,000
Coupon interest expense 300,000 300,000
Amortization of debt issuance costs $ 100,000 $ 100,000
2023 Notes (mature September 2023) | Maximum    
Debt Instrument [Line Items]    
Percentage of closing price of common stock to conversion price 130.00%  
Number of trading days 20  
Number of consecutive trading days 30