Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Net Properties and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Vessels and related equipment	$ 1,751,479	$ 1,727,197
Other properties and equipment	32,901	28,969
Property, Plant and Equipment, Gross	1,784,380	1,756,166
Less accumulated depreciation and amortization	712,360	571,884
Net properties and equipment	$ 1,072,020	$ 1,184,282

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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