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Note 6 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Long-term debt, outstanding principal $ 3,094,964 $ 2,946,804
Long-term debt, unamortized original fees and costs (25,608) (31,306)
Long-term debt, net 3,069,356 2,915,498
Long-term debt, outstanding principal, current 44,364 44,275
Long-term debt, unamortized original fees and costs, current 0 0
Current maturities of long-term debt 44,364 44,275
Long-term debt, outstanding principal, noncurrent 3,050,600 2,902,529
Long-term debt, unamortized original fees and costs, noncurrent (25,608) (31,306)
Long-term debt, net of current maturities and debt issuance costs $ 3,024,992 $ 2,871,223
Line of Credit [Member] | Bank Credit Facility [Member]    
Long-term debt, interest rate 6.685% 7.164%
Long-term debt, outstanding principal $ 1,194,600 $ 1,046,300
Long-term debt, unamortized original fees and costs (10,177) (13,403)
Long-term debt, net $ 1,184,423 $ 1,032,897
Senior Notes [Member] | Senior Note 4.750% Due 2027 [Member]    
Long-term debt, interest rate 4.75% 4.75%
Long-term debt, outstanding principal $ 1,000,000 $ 1,000,000
Long-term debt, unamortized original fees and costs (6,331) (7,792)
Long-term debt, net $ 993,669 $ 992,208
Senior Notes [Member] | Senior Note 4750 Due 2031 Member    
Long-term debt, interest rate 4.75% 4.75%
Long-term debt, outstanding principal $ 900,000 $ 900,000
Long-term debt, unamortized original fees and costs (9,100) (10,111)
Long-term debt, net $ 890,900 $ 889,889
Other Long-Term Debt [Member]    
Long-term debt, interest rate 5.208% 5.208%
Long-term debt, outstanding principal $ 364 $ 504
Long-term debt, unamortized original fees and costs 0 0
Long-term debt, net $ 364 $ 504