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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Note H - Commitments and Contingencies (Details Textual) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 0.5	$ 0.4
Operating Lease, Weighted Average Discount Rate, Percent	4.10%		4.00%
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 9 months 18 days		3 years 10 months 24 days
Operating Lease, Payments	$ 5.9		$ 6.6
Contractual Obligation	478.1
Contractual Obligation, to be Paid, Remainder of Fiscal Year	$ 116.7
Number of Slots for Aircraft Modifications	20
B-767-300 [Member]
Number of Owned Aircrafts	13
Number Of Aircraft to Be Purchased	3
A321-200 [Member]
Number of Owned Aircrafts	6
A-330 [Member]
Number of Owned Aircrafts	5
A330-300 [Member]
Number Of Aircraft to Be Purchased	5
Minimum [Member] \| Property Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	1 month
Minimum [Member] \| Equipment Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	1 year
Maximum [Member] \| Property Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	9 years
Maximum [Member] \| Equipment Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	5 years
Aircraft Provided by Customers [Member]
Lessee, Number of Leased Aircraft	16
Aircraft Leased From External Customers [Member]
Lessee, Number of Leased Aircraft	5