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Debt - Narrative (Details)
1 Months Ended 3 Months Ended 12 Months Ended
May 14, 2021
Apr. 14, 2021
USD ($)
Apr. 09, 2021
USD ($)
$ / shares
Apr. 07, 2021
USD ($)
$ / shares
Apr. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
payment
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Line of Credit Facility [Line Items]                  
Proceeds from issuance of Senior Notes due 2028             $ 250,000,000.0 $ 0 $ 0
Loss on early extinguishment of debt             24,700,000 1,200,000 0
Proceeds from issuance of Convertible Senior Notes             $ 86,300,000 $ 0 $ 0
Senior Notes                  
Line of Credit Facility [Line Items]                  
Loss on early extinguishment of debt         $ 24,700,000        
Redemption premium         18,100,000        
Write off of deferred financing cost         4,400,000        
Debt discount         $ 2,200,000        
Senior Secured Notes, 7.5% | Senior Notes                  
Line of Credit Facility [Line Items]                  
Face amount   $ 250,000,000              
Stated interest rate   7.50%         7.50%    
Proceeds from issuance of Senior Notes due 2028   $ 245,200,000              
Redemption price, percentage             100.00%    
Redemption period             12 months    
Percentage of outstanding amount, offer to purchase             101.00%    
Senior Secured Notes, 7.5% | Senior Notes | Level 2                  
Line of Credit Facility [Line Items]                  
Fair value of debt instrument             $ 264,700,000    
Senior Secured Notes, 12.0% | Senior Notes                  
Line of Credit Facility [Line Items]                  
Stated interest rate         12.00%     12.00%  
Redemption price, percentage 107.00%                
Repurchased face amount         $ 195,900,000        
Debt discount               $ 2,300,000  
Senior Convertible Notes, 2.75% | Senior Notes                  
Line of Credit Facility [Line Items]                  
Face amount     $ 86,300,000            
Stated interest rate             2.75%    
Debt instrument, redemption price, percentage of principal amount redeemed     100.00%       100.00%    
Proceeds from issuance of Convertible Senior Notes     $ 83,700,000            
Debt instrument, convertible, conversion ratio             0.0533547    
Debt Instrument, convertible, conversion price (USD per share) | $ / shares     $ 18.74            
Debt instrument, convertible, threshold percentage of stock price trigger             130.00%    
Debt instrument, trading days, term             20 days    
Debt instrument, consecutive trading days, term             30 days    
Senior Convertible Notes, 2.75% | Senior Notes | Level 2                  
Line of Credit Facility [Line Items]                  
Fair value of debt instrument             $ 98,600,000    
Senior Convertible Notes, 2.75% | Call Option                  
Line of Credit Facility [Line Items]                  
Option indexed to issuer's equity, issuance cost       $ 5,700,000          
Option, strike price (USD per share) | $ / shares       $ 18.74          
Option, cap price (USD per share) | $ / shares       $ 22.95          
Derivative, loss on derivative           $ 1,000,000      
E.ON Contingent Obligation | Long-term Debt                  
Line of Credit Facility [Line Items]                  
Stated interest rate             10.94%    
Number of monthly installments | payment             72    
Realized gain (loss) on contingent obligation             $ 1,400,000    
Revolving Credit Facility | LIBOR                  
Line of Credit Facility [Line Items]                  
Debt instrument, basis spread on variable rate             5.375%