v3.26.3
Long Term Debt - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
May 12, 2026
Dec. 31, 2025
Debt Instrument [Line Items]            
Loss on debt amendments and extinguishments $ 0.0 $ 0.0 $ (2.8) $ (1.5)    
Fair value of long-term debt $ 1,917.6   $ 1,917.6     $ 1,920.0
Senior Secured Credit Facility            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 5.40%   5.40%      
Debt instrument, interest rate, stated percentage 5.40%   5.40%      
4.50 % Convertible Senior Notes            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 4.50% 4.50% 4.50% 4.50%    
Debt instrument, maturity date     Aug. 15, 2025      
Debt instrument, interest rate, stated percentage 4.50% 4.50% 4.50% 4.50%    
CUSA [Member]            
Debt Instrument [Line Items]            
Loss on debt amendments and extinguishments $ 0.0 $ 0.0 $ 2.8 $ 1.5    
Term Loan Credit facility | Senior Secured Credit Facility            
Debt Instrument [Line Items]            
Reduction in Interest Rate         0.25%  
Reset Soft Call Intrest Rate         101.00%  
Term Loan Credit facility | CUSA [Member]            
Debt Instrument [Line Items]            
Debt Issuance Cost Capitalized 0.6   0.6      
Legal and Other Fees Related to Debt Extinguishment     0.3      
Term Loan Credit facility | CUSA [Member] | Senior Secured Credit Facility            
Debt Instrument [Line Items]            
Quarterly principal payments due     $ 1.6      
Last quarterly payment date     Mar. 31, 2030      
Final principal payment due date     May 24, 2030      
Debt Issuance Costs 0.9   $ 0.9      
Term Loan Credit facility | Maximum [Member] | CUSA [Member]            
Debt Instrument [Line Items]            
Unamortized Debt Issuance Expense 2.5   2.5      
Revolving Credit Line | Senior Secured Credit Facility            
Debt Instrument [Line Items]            
Amount outstanding under the term loan 627.6   627.6      
Revolving Credit Line | Amended Senior Secured Credit Facility [Member]            
Debt Instrument [Line Items]            
Amount outstanding under the revolving credit line $ 0.0   $ 0.0