Annual report pursuant to Section 13 and 15(d)

DEBT - Narrative (Details)

v3.24.0.1
DEBT - Narrative (Details)
£ in Millions
 1 Months Ended 9 Months Ended 12 Months Ended
Jan. 27, 2023
GBP (£)
Jan. 31, 2024
GBP (£)
aircraft
Jan. 31, 2023
USD ($)
aircraft
loan
Jan. 31, 2023
GBP (£)
aircraft
loan
Feb. 28, 2021
USD ($)
Nov. 30, 2016
USD ($)
loan
Dec. 31, 2022
USD ($)
Dec. 31, 2023
USD ($)
debt_instrument
Dec. 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
Debt Instrument [Line Items]                    
Proceeds from issuance of long-term debt | £ £ 138.0     £ 145.0            
Unamortized debt issuance costs               $ 14,200,000    
Repayments of debt             $ 8,560,000 142,046,000   $ 19,213,000
Long-term debt             511,421,000 548,070,000 $ 511,421,000  
Interest             17,586,000 $ 39,475,000   32,030,000
Subsequent Event                    
Debt Instrument [Line Items]                    
Proceeds from issuance of long-term debt | £   £ 55.0                
NatWest Debt                    
Debt Instrument [Line Items]                    
Debt instruments, number of agreements | debt_instrument               2    
NatWest Debt | Sterling Overnight Index Average (SONIA)                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     2.75% 2.75%            
NatWest Debt | Sterling Overnight Index Average (SONIA) | Subsequent Event                    
Debt Instrument [Line Items]                    
Basis spread on variable rate   2.75%                
Availability period   15 months                
Senior Notes | 6.875% Senior Notes                    
Debt Instrument [Line Items]                    
Stated interest rate         6.875%     6.875%    
Face amount         $ 400,000,000          
Proceeds from issuance of long-term debt         $ 395,000,000          
Redemption price         101.00%          
Interest expense, debt             13,800,000 $ 27,500,000   28,000,000
Unamortized debt issuance costs             7,200,000 5,800,000 7,200,000  
Long-term debt             392,763,000 394,184,000 392,763,000  
Secured Debt | Lombard Debt                    
Debt Instrument [Line Items]                    
Face amount           $ 200,000,000        
Interest expense, debt             3,800,000     3,800,000
Debt instruments, number of agreements | loan           2        
Debt instrument term           7 years        
Basis spread on variable rate           2.25%        
Repayments of debt     $ 129,100,000       8,600,000     $ 13,100,000
Interest payment               600,000    
Long-term debt             118,658,000 0 118,658,000  
Secured Debt | NatWest Debt                    
Debt Instrument [Line Items]                    
Unamortized debt issuance costs               8,400,000    
Debt instruments, number of agreements | loan     2 2            
Debt instrument term     13 years 13 years            
Debt instrument, helicopters secured | aircraft     10 10            
Principal payment               13,000,000 11,400,000  
Long-term debt             0 153,886,000 0  
Secured Debt | NatWest Debt | Subsequent Event                    
Debt Instrument [Line Items]                    
Debt instrument term   12 years                
Debt instrument, helicopters secured | aircraft   4                
Line of Credit | ABL Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity               85,000,000    
Line of Credit | ABL Facility | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity             600,000 3,100,000 600,000  
Maximum borrowing capacity increase               120,000,000    
Long-term debt             $ 0 $ 0 $ 0