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Long-Term Debt - Convertible Senior Notes (Details)
6 Months Ended
Mar. 19, 2021
USD ($)
Jun. 30, 2021
USD ($)
$ / shares
Mar. 26, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]        
Redemption price percentage   100.00%    
Long-term debt, net   $ 1,054,317,000   $ 1,068,624,000
Convertible Senior Notes Due 2028 | Convertible Notes Payable        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount $ 150,000,000.0 $ 170,000,000 $ 20,000,000.0 $ 0
Interest rate, stated percentage 3.25% 3.25%   3.25%
Proceeds from borrowings, net of issuance costs $ 163,600,000      
Debt issuance costs $ 6,400,000      
Debt Instrument, Convertible, Conversion Ratio   0.1592610    
Debt Instrument, Convertible, Conversion Price | $ / shares   $ 6.28    
Redemption price percentage   130.00%    
Debt Instrument, Convertible, Threshold Trading Days   20    
Debt Instrument, Convertible, Threshold Consecutive Trading Days   30    
Debt Instrument, Convertible, Event of Default Minimum Percentage Of Aggregate Principal Amount Holders May Declare Immediately Due And Payable   25.00%    
Convertible Senior Notes Due 2028 | Convertible Notes Payable | Debt Instrument, Redemption, Period One        
Debt Instrument [Line Items]        
Redemption price percentage   130.00%    
Debt Instrument, Convertible, Threshold Trading Days   20    
Debt Instrument, Convertible, Threshold Consecutive Trading Days   30    
Convertible Senior Notes Due 2028 | Convertible Notes Payable | Debt Instrument, Redemption, Period Two        
Debt Instrument [Line Items]        
Debt Instrument, Convertible, Threshold Consecutive Trading Days   10    
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger   98.00%