Long-term Debt (Summary of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt	$ 2,365,354	$ 2,382,229
Unamortized discount	(12,875)	(13,873)
Unamortized deferred financing costs	(5,893)	(6,607)
Long-term debt, net	2,346,586	2,361,749
Current portion of long-term debt	67,500	67,500
Noncurrent portion of long-term debt	$ 2,279,086	2,294,249
Senior Notes | 4.75% Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate	4.75%
Long-term debt	$ 774,729	$ 774,729
Senior Notes | 4.25% Notes due February 2029
Debt Instrument [Line Items]
Interest rate	4.25%	4.25%
Long-term debt	$ 1,000,000	$ 1,000,000
Secured debt | Term Loan A Facility
Debt Instrument [Line Items]
Long-term debt	$ 590,625	$ 607,500