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Long-Term Debt - Convertible Senior Notes Due 2022 (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
May 01, 2022
Debt Instrument [Line Items]          
Interest expense $ 5,034 $ 5,943 $ 10,341 $ 12,055  
Amortization of debt issuance costs     1,161 1,587  
Convertible Senior Notes Maturing May 2022          
Debt Instrument [Line Items]          
Repurchased principal amount         $ 35,000
Interest rate (as a percent)         4.80%
Interest expense $ 100 400 $ 600 800  
Coupon interest expense   $ 400   700  
Amortization of debt issuance costs       $ 100