Quarterly report [Sections 13 or 15(d)]

Debt - Summary of Outstanding Debt (Details)

v3.26.1
Debt - Summary of Outstanding Debt (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Total debt $ 3,569,277 $ 3,351,649
Less: Short-term debt and current portion of long-term debt (35,364) (60,187)
Long-term debt $ 3,533,913 3,291,462
Commercial notes, periodic interest and principal payments, 5.25%, expire May 1, 2026 | Commercial Paper    
Debt Instrument [Line Items]    
Interest rate 5.25%  
Premium financing notes $ 634 2,519
Commercial notes, periodic interest and principal payments, 5.25%, expire June 1, 2026 | Commercial Paper    
Debt Instrument [Line Items]    
Interest rate 5.25%  
Premium financing notes $ 201 499
Commercial notes, periodic interest and principal payments, 5.25%, expire June 21, 2026 | Commercial Paper    
Debt Instrument [Line Items]    
Interest rate 5.25%  
Premium financing notes $ 1,185 2,355
Medium-Term Note | Credit Agreement | Secured Debt    
Debt Instrument [Line Items]    
Debt term 7 years  
Interest rate 2.00%  
Long-term debt $ 1,656,411 1,659,629
Line of Credit | Credit Agreement | Revolving Credit Facility    
Debt Instrument [Line Items]    
Debt term 5 years  
Basis spread on variable rate 2.50%  
Long-term debt $ 319,399 74,062
Line of Credit | Credit Agreement | Revolving Credit Facility | Minimum    
Debt Instrument [Line Items]    
Commitment fee percentage 0.25%  
Line of Credit | Credit Agreement | Revolving Credit Facility | Maximum    
Debt Instrument [Line Items]    
Commitment fee percentage 0.50%  
Senior Secured Notes | 8-year senior secured notes, semi-annual interest payments, 4.38%, mature February 1, 2030    
Debt Instrument [Line Items]    
Debt term 8 years  
Interest rate 4.38%  
Long-term debt $ 398,560 402,677
Senior Secured Notes | 8-year senior secured notes, semi-annual interest payments, 5.88%, mature August 1, 2032    
Debt Instrument [Line Items]    
Debt term 8 years  
Interest rate 5.88%  
Long-term debt $ 1,192,887 $ 1,209,908