SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives and Residual Values

Estimated useful lives and residual values for each asset class are as follows:

Asset Class	Current Useful Life Effective January 1, 2024 (Years)	Previous Useful Life Effective December 31, 2023 and Prior (Years)	Residual Value
Building	39.0	39.0	—
Regional jet aircraft	26.0	22.0	0.0% – 10.0%
General aviation aircraft, engines, and flight equipment	10.0 – 26.0	10.0 – 22.0	0.0% – 50.0%
Office equipment and leasehold improvements	3.0 – 20.0	3.0 – 20.0	—

Property and equipment consisted of the following as of December 31, 2025 and 2024:

(in millions)	2025		2024
Aircraft	$	3,206.6	$	2,898.7
Engines and flight equipment	300.4		243.4
Land and buildings	211.3		158.9
Office equipment and leasehold improvements	75.0		67.2
Total property and equipment	3,793.3		3,368.2
Less accumulated depreciation and amortization	(1,383.3)		(1,258.7)
Property and equipment, net	$	2,410.0	$	2,109.5

Schedule of Carrying amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2025, 2024, and 2023 are as follows:

(in millions)	Balance as of 12/31/2025	Additions	Balance as of 12/31/2024	Additions	Balance as of 12/31/2023	Additions	Balance as of 1/1/2023
Carrying amount of goodwill	$122.5	$120.4	$2.1	—	$2.1	$2.1	—

Schedule of Basic and Diluted Net Income Per Common Share

Basic and diluted net income per common share were as follows:

	Year Ended December 31,
(in millions, except share and per share data)	2025		2024		2023
Numerator:
Net Income	$	76.2	$	64.6	$	54.8
Denominator:
Weighted-average common shares outstanding - basic	40,020,266		39,096,437		39,084,367
Dilutive effects of restricted stock units	605,389		662,838		569,606
Dilutive effects of U.S. Treasury Warrants	31,865		—		—
Adjusted weighted-average common shares outstanding - diluted	40,657,520		39,759,275		39,653,973
Net income per common share:
Basic	$	1.90	$	1.65	$	1.40
Diluted	$	1.87	$	1.62	$	1.38