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Debt - Narrative (Details)
1 Months Ended 6 Months Ended
Apr. 30, 2023
USD ($)
Feb. 28, 2023
USD ($)
shares
$ / shares
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2022
$ / shares
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Instrument [Line Items]            
Conversion price (in dollars per share) | $ / shares     $ 7.3471 $ 63.5892    
New DNB Facility            
Debt Instrument [Line Items]            
Principal $ 175,000,000       $ 150,000,000  
Proceeds from issuance of long-term debt 25,000,000          
Repayment of long-term debt     $ 10,000,000      
DNB guarantees & letters of credit            
Debt Instrument [Line Items]            
Principal $ 25,000,000          
$250m Convertible Bonds            
Debt Instrument [Line Items]            
Principal   $ 250,000,000 $ 250,000,000      
Conversion price (in dollars per share) | $ / shares   $ 7.3471        
Convertible shares (in shares) | shares   34,027,031        
Debt instrument, interest rate   5.00% 5.00%      
Share lending arrangement, shares authorized (in shares) | shares   25,000,000 25,000,000      
Senior secured bonds            
Debt Instrument [Line Items]            
Principal   $ 150,000,000        
Debt instrument, interest rate   9.50%        
Purchase price %   101.00%        
Value of sequestrated assets   $ 10,000,000        
Senior secured bonds | Debt covenant period 1            
Debt Instrument [Line Items]            
Minimum book equity ratio   20.00%        
Minimum liquidity   $ 15,000,000        
Senior secured bonds | Debt covenant period 2            
Debt Instrument [Line Items]            
Minimum book equity ratio   25.00%        
Minimum liquidity   $ 50,000,000        
$350m Convertible Bonds            
Debt Instrument [Line Items]            
Principal           $ 350,000,000
Repayment of long-term debt     $ 350,000,000      
Debt instrument, interest rate     3.875%      
Interest bearing debt            
Debt Instrument [Line Items]            
Average interest rate     8.90% 5.80%    
Interest bearing debt excl convertible bonds            
Debt Instrument [Line Items]            
Average interest rate     10.30% 6.20%