Note 11 - Equity Method Investment (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Jun. 30, 2021
Proceeds from Sale of Property, Plant, and Equipment, Total			$ 50,112	$ 43,812
Payments to Acquire Property, Plant, and Equipment, Total			61,408	21,801
Reversal of Deferred Gains of Sale of Property			(30)	53
Operating Lease, Liability, Total	$ 43,473		43,473
Income (Loss) from Equity Method Investments	$ 7,400	$ 3,230	21,261	9,572
Proceeds from Equity Method Investment, Distribution			$ 7,350	1,960
Transport Enterprise Leasing LLC [Member]
Equity Method Investment, Ownership Percentage	49.00%		49.00%
Proceeds from Sale of Property, Plant, and Equipment, Total			$ 0	1,000
Revenue from Related Parties			600	700
Payments to Acquire Property, Plant, and Equipment, Total			0
Payments for Rent			3,400	$ 200
Reversal of Deferred Gains of Sale of Property			100
Due from Related Parties, Total	$ 100		100		$ 800
Operating Lease, Liability, Total	3,400		3,400		$ 0
Income (Loss) from Equity Method Investments			21,300
Proceeds from Equity Method Investment, Distribution			7,400
Transport Enterprise Leasing LLC [Member] | Reduction in TEL Investment [Member]
Deferred Gain on Sale of Property	$ 200		$ 200			$ 300