Annual report [Section 13 and 15(d), not S-K Item 405]

DEBT - Schedule of Maturities Dates and Fixed Interest Rates (Details)

v3.25.4
DEBT - Schedule of Maturities Dates and Fixed Interest Rates (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Debentures $ 2,468,000 $ 2,134,000
Unsecured Notes | 3.52% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 3.52%  
Debentures $ 40,400 40,400
Unsecured Notes | 3.19% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 3.19%  
Debentures $ 34,600 34,600
Unsecured Notes | 3.41% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 3.41%  
Debentures $ 43,000 43,000
Unsecured Notes | 3.77% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 3.77%  
Debentures $ 32,000 32,000
Unsecured Notes | 2.35% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 2.35%  
Debentures $ 15,000 15,000
Unsecured Notes | 1.13% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 1.13%  
Debentures $ 10,000 10,000
Unsecured Notes | 1.31% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 1.31%  
Debentures $ 10,000 10,000
Unsecured Notes | 1.94% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 1.94%  
Debentures $ 25,200 25,200
Unsecured Notes | 1.58% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 1.58%  
Debentures $ 60,000 60,000
Unsecured Notes | 5.74% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 5.74%  
Debentures $ 16,000 16,000
Unsecured Notes | 5.09% Fixed Interest Rate    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated (as a percent) 5.09%  
Debentures $ 63,800 63,800
Unsecured Notes | SBIC debentures    
Debt Instrument [Line Items]    
Debentures $ 350,000 $ 350,000