Long-Term Debt - Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,227,400	$ 1,233,795
Less deferred financing costs and discounts	(6,362)	(7,637)
Less current portion	0	(6,388)
Long-term debt, net of debt discount and issuance costs of $6,362 and $7,637 at December 31, 2025 and 2024, respectively	$ 1,221,038	$ 1,219,770
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 (1)
Debt Instrument [Line Items]
Effective Interest Rate	5.25%	5.25%
Long-term debt, gross	$ 0	$ 6,395