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Borrowings - Senior Notes (Details) - USD ($)
Feb. 06, 2023
Sep. 22, 2021
Aug. 27, 2020
Sep. 30, 2023
May 26, 2017
2028 Notes          
Line of Credit Facility [Line Items]          
Debt Instrument, Repurchase Amount       $ 2,000,000  
2028 Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Face amount $ 400,000,000        
Stated percentage 8.375%        
2028 Notes | Senior Notes | On Or After September 1, 2022          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount 104.188%        
2028 Notes | Senior Notes | February 1, 2023 To January 31, 2024          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount 102.094%        
2028 Notes | Senior Notes | On Or Before February 1, 2025          
Line of Credit Facility [Line Items]          
Redemption price, percentage of aggregate principal amount 40.00%        
Redemption price of original principal amount 108.375%        
Redemption price, minimum percentage of principal amount outstanding 60.00%        
2028 Notes | Senior Notes | On Or Before February 1, 2025 | Change Of Control Event          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount 101.00%        
2028 Notes | Senior Notes | February 1, 2025 And Thereafter          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount 100.00%        
2025 Notes          
Line of Credit Facility [Line Items]          
Debt Instrument, Repurchase Amount       $ 2,000,000  
2025 Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Face amount     $ 300,000,000    
Stated percentage     7.375%    
2025 Notes | Senior Notes | On Or After September 1, 2022          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount     103.688%    
2025 Notes | Senior Notes | September 1, 2023 To October 31, 2024          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount     101.844%    
2025 Notes | Senior Notes | September 1, 2024 And Thereafter          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount     100.00%    
2025 Notes | Senior Notes | On Or Before September 1, 2022 | Change Of Control Event          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount     101.00%    
2029 Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Face amount   $ 350,000,000      
Stated percentage   5.00%      
2029 Notes | Senior Notes | On Or After September 1, 2022          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount   102.50%      
2029 Notes | Senior Notes | September 1, 2023 To October 31, 2024          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount   101.25%      
2029 Notes | Senior Notes | September 1, 2024 And Thereafter          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount   100.00%      
2029 Notes | Senior Notes | On Or Before September 1, 2022          
Line of Credit Facility [Line Items]          
Redemption price, percentage of aggregate principal amount   40.00%      
Redemption price of original principal amount   105.00%      
Debt redemption period   90 days      
Redemption price, minimum percentage of principal amount outstanding   60.00%      
2029 Notes | Senior Notes | On Or Before September 1, 2022 | Change Of Control Event          
Line of Credit Facility [Line Items]          
Redemption price of original principal amount   101.00%      
Note Due 2023 | Convertible Senior Notes          
Line of Credit Facility [Line Items]          
Face amount         $ 345,000,000
Stated percentage         3.50%