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Senior Notes (Summary of Senior Notes) (Parenthetical) (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 15, 2030
Oct. 27, 2017
Mar. 31, 2025
Dec. 31, 2024
May 31, 2020
Oct. 31, 2017
Debt Instrument [Line Items]            
Long-term Debt     $ 616,824 $ 616,618    
Senior notes 4.00% due 2030 [Member]            
Debt Instrument [Line Items]            
Debt Instrument Interest Rate Stated Percentage     4.00% 4.00%    
Long-term Debt         $ 400,000  
Debt instrument, maturity date     May 31, 2030      
Senior notes 4.00% due 2030 [Member] | After February 15, 2030 [Member]            
Debt Instrument [Line Items]            
Redemption price, percentage of principal amount     100.00%      
Senior notes 4.00% due 2030 [Member] | Measurement Input, Discount Rate [Member] | Prior to February 15, 2030 [Member]            
Debt Instrument [Line Items]            
Redemption at treasury rate basis point     0.50%      
Senior notes 4.00% due 2030 [Member] | Forecast [Member]            
Debt Instrument [Line Items]            
Redemption price, percentage of principal amount 100.00%          
Senior notes 5.20% due 2047 [Member]            
Debt Instrument [Line Items]            
Debt Instrument Interest Rate Stated Percentage     5.20% 5.20%    
Long-term Debt           $ 200,000
Debt instrument, maturity date     Oct. 31, 2047      
Redemption price, percentage of principal amount     100.00%      
Additional issuance of long-term debt   $ 25,000