Segment Information - Schedule of Segment Information by Regions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Services revenue
Services revenue	$ 451.9	$ 425.3
Operating income (loss)
Total operating income	18.9	19.3
General and administrative expenses
General and administrative expenses	34.8	30.6
Depreciation and amortization
Depreciation expense and amortization	9.0	8.4
Lease Type Contracts
Services revenue
Services revenue	62.6	68.2
Management Type Contracts
Services revenue
Services revenue	159.5	148.1
Reimbursed Management Type Contract Revenue
Services revenue
Services revenue	229.8	209.0
Operating Segments | Commercial
Services revenue
Services revenue	147.9	144.4
Operating income (loss)
Total operating income	32.4	31.2
General and administrative expenses
General and administrative expenses	8.5	8.2
Depreciation and amortization
Depreciation expense and amortization	3.9	3.6
Operating Segments | Commercial | Lease Type Contracts
Services revenue
Services revenue	58.4	64.6
Operating Segments | Commercial | Management Type Contracts
Services revenue
Services revenue	89.5	79.8
Operating Segments | Aviation
Services revenue
Services revenue	74.2	71.9
Operating income (loss)
Total operating income	11.2	8.6
General and administrative expenses
General and administrative expenses	4.1	3.9
Depreciation and amortization
Depreciation expense and amortization	2.6	2.8
Operating Segments | Aviation | Lease Type Contracts
Services revenue
Services revenue	4.2	3.6
Operating Segments | Aviation | Management Type Contracts
Services revenue
Services revenue	70.0	68.3
Segment Reconciling Items
Operating income (loss)
Total operating income	(24.7)	(20.5)
General and administrative expenses
General and administrative expenses	22.2	18.5
Depreciation and amortization
Depreciation expense and amortization	$ 2.5	$ 2.0