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Note 12 - Properties and Equipment, Accrued Expenses, Other Current Liabilities and Other Liabilities - Summary of Property and Equipment (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Vessels and related equipment | $ 901,644 | $ 898,649
Other properties and equipment | 23,574 | 19,625
Property, Plant and Equipment, Gross, Ending Balance | 925,218 | 918,274
Less accumulated depreciation and amortization | 247,638 | 230,234
Properties and equipment, net | $ 677,580 | $ 688,040

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