Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

Property, Plant and Equipment [Table Text Block]

(In Thousands)	December 31,		December 31,
	2025		2024
Properties and equipment:
Vessels and related equipment	$	1,751,479	$	1,727,197
Other properties and equipment		32,901		28,969
		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

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

(In Thousands, except per share data)	Year Ended December 31,
	2025		2024		2023
Net income available to common stockholders	$	334,661	$	180,656	$	97,185
Weighted average outstanding shares of common stock, basic		50,053		52,452		51,591
Dilutive effect of options, warrants and stock awards		379		619		1,346
Weighted average common stock and equivalents		50,432		53,071		52,937
Income per share, basic	$	6.69	$	3.44	$	1.88
Income per share, diluted	$	6.64	$	3.40	$	1.84
Additional information:
Incremental "in-the-money" options, warrants, and restricted stock units outstanding at the end of the period		667		856		1,674

Financing Receivable, Allowance for Credit Loss [Table Text Block]

	Trade
(In Thousands)	and
	Other Receivables
Balance at January 1, 2023	$	14,060
Current period provision for expected credit losses		3,305
Write offs		(1,484	)
Recoveries		490
Other		(457	)
Balance at December 31, 2023	$	15,914
Current period credit for expected credit losses		(1,430	)
Write offs (A)		(10,969	)
Other		(331	)
Balance at December 31, 2024	$	3,184
Current period credit for expected credit losses		(150	)
Balance at December 31, 2025	$	3,034