Note 4 - Financing Arrangements - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Less current portion of long-term debt	$ (699,223)	$ (500,000)
Total long-term debt	880,243	977,702
Senior Notes [Member]
Long-term debt	1,441,300	699,000
Revolving Credit Facility [Member]
Long-term debt	$ 138,100	$ 778,700