FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 18, 2026
Fair Value, Option, Quantitative Disclosures [Line Items]
Unrealized and realized gains	$ 7.7	$ 10.6	$ 5.5
Fair value of EVE equities	4.0	5.4
Unrealized gains (losses) related to EVE equities	(1.5)	(1.9)	0.1
Manufacturer incentives				$ 17.5
Reduction in value to investment			$ 3.6
Cape Air Aircraft
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated useful life			15 years
U.S. Treasury Warrants
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value adjustments of the U.S. Treasury Warrants	(1.7)	0.2	$ (1.2)
Long-Term Debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Debt, difference to fair value	10.8	(11.5)
Put Option
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate put price				$ 10.0
Other non-current assets	11.4	13.3
Warrant
Fair Value, Option, Quantitative Disclosures [Line Items]
Other non-current assets	11.4	13.3
EVE Warrants
Fair Value, Option, Quantitative Disclosures [Line Items]
Warrant acquired (in shares)				1,500,000
Exercise price of Warrant (in dollars per share)				$ 0.01
Lock up period				3 years
Unrealized gains (losses)	(2.2)	$ (2.8)	$ 0.2
U.S. Treasury Warrants
Fair Value, Option, Quantitative Disclosures [Line Items]
Reclassification of U.S. Treasury Warrants from liability awards to equity awards	$ 7.4
Warrants exercised (in shares)	315,534
Net cash disbursement	$ 1.1
Warrants outstanding (in shares)	691,701
U.S. Treasury Warrants | Subsequent Event
Fair Value, Option, Quantitative Disclosures [Line Items]
Warrants outstanding (in shares)					0
Warrants settled					$ 5.3
EVE Investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Shares acquired (in shares)				1,000,000
Purchase price (in dollars per share)				$ 10.00