Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Income Taxes Paid, Net	$ 38,000	$ 135,000	$ 50,000
Increase (Decrease) in Obligation, Pension Benefits	4,000	1,000	7,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(31,000)	8,000	23,000
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	$ 9,000	(2,000)	(5,000)
Open Tax Year	2021 2022 2023 2024 2025
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 0	0	$ 0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		$ 258,000