Note 13- Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 1,968,104	$ 1,978,967	$ 1,760,787
Other comprehensive income	(16,103)	3,389	30,904
Balance	2,039,514	1,968,104	1,978,967
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	13,708	9,162	(4,675)
Other comprehensive income	(7,714)	4,546	13,837
Balance	5,994	13,708	9,162
Balance, beginning	(2,227)	(544)	4,689
Change , tax	2,822	(1,683)	(5,233)
Balance, ending	595	(2,227)	(544)
Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member]
Balance	(7,871)	(6,714)	(23,781)
Other comprehensive income	(8,389)	(1,157)	17,067
Balance	(16,260)	(7,871)	(6,714)
Balance, beginning	170	(258)	6,196
Change , tax	3,069	428	(6,454)
Balance, ending	3,239	170	(258)
AOCI Attributable to Parent [Member]
Balance	5,837	2,448	(28,456)
Other comprehensive income	(16,103)	3,389	30,904
Balance	(10,266)	5,837	2,448
Balance, beginning	(2,057)	(802)	10,885
Change , tax	5,891	(1,255)	(11,687)
Balance, ending	$ 3,834	$ (2,057)	$ (802)