Note 9 - Debt - Short-term and Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2025	Apr. 21, 2025	Mar. 11, 2025	Dec. 31, 2024
The 4.000% Senior Notes Due in 2025 [Member]
Unamortized discount, current	$ 0			$ 300
Interest rate	4.00%	4.00%		4.00%
Interest rate	4.00%	4.00%		4.00%
The 3.625% Senior Notes Due in 2050 [Member]
Interest rate	3.625%			3.625%
Unamortized discount	$ 9,000			$ 9,200
Interest rate	3.625%			3.625%
Unamortized discount	$ 9,000			$ 9,200
The 4.125% Senior Notes Due in 2029 [Member]
Interest rate	4.125%			4.125%
Unamortized discount	$ 5,600			$ 6,300
Interest rate	4.125%			4.125%
Unamortized discount	$ 5,600			$ 6,300
The 5.250% Senior Notes Due in 2034 [Member]
Interest rate	5.25%			5.25%
Unamortized discount	$ 13,500			$ 14,200
Interest rate	5.25%			5.25%
Unamortized discount	$ 13,500			$ 14,200
The 5.250% Senior Notes Due in 2035 [Member]
Interest rate	5.25%		5.25%
Unamortized discount	$ 7,700		$ 1,700
Interest rate	5.25%		5.25%
Unamortized discount	$ 7,700		$ 1,700
The 5.500% Senior Notes Due in 2045 [Member]
Interest rate	5.50%			5.50%
Unamortized discount	$ 3,600			$ 3,700
Interest rate	5.50%			5.50%
Unamortized discount	$ 3,600			$ 3,700
The 5.750% Senior Notes Due in 2033 [Member]
Interest rate	5.75%			5.75%
Unamortized discount	$ 7,500			$ 7,900
Interest rate	5.75%			5.75%
Unamortized discount	$ 7,500			$ 7,900