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Long-Term Debt - Long Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Long-term debt, gross $ 1,233,795 $ 1,246,086
Less deferred financing costs and discounts (7,637) (8,919)
Less current portion (6,388) (12,226)
Long-term debt, net of debt discount and issuance costs of $7,637 and $8,919 at December 31, 2024 and 2023, respectively $ 1,219,770 $ 1,224,941
3.95% Senior Notes Due 2028    
Debt Instrument [Line Items]    
Debt interest rate 3.95%  
Effective Interest Rate 4.03% 4.03%
Long-term debt, gross $ 482,505 $ 482,505
5.15% Senior Notes Due 2029    
Debt Instrument [Line Items]    
Debt interest rate 5.15%  
Effective Interest Rate 5.26% 5.26%
Long-term debt, gross $ 344,895 $ 344,895
7.15% Senior Notes Due 2033    
Debt Instrument [Line Items]    
Debt interest rate 7.15%  
Effective Interest Rate 7.28% 7.28%
Long-term debt, gross $ 400,000 $ 400,000
Equipment Loans Due 2025    
Debt Instrument [Line Items]    
Effective Interest Rate 5.25% 5.25%
Long-term debt, gross $ 6,395 $ 18,686