Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Services revenue	$ 451.9	$ 425.3
Cost of services (exclusive of depreciation and amortization)	389.2	367.0
General and administrative expenses	34.8	30.6
Depreciation and amortization	9.0	8.4
Operating income	18.9	19.3
Other expense (income)
Interest expense	7.4	6.8
Interest income	(0.1)	(0.1)
Total other expenses	7.3	6.7
Earnings before income taxes	11.6	12.6
Income tax expense	3.1	3.3
Net income	8.5	9.3
Less: Net income attributable to noncontrolling interests	0.9	0.9
Net income attributable to SP Plus Corporation	$ 7.6	$ 8.4
Net income per common share
Basic	$ 0.38	$ 0.43
Diluted	$ 0.38	$ 0.42
Weighted average shares outstanding
Basic (in shares)	19,803,578	19,701,426
Diluted (in shares)	19,992,969	19,867,300
Lease and Management Type Contracts
Services revenue	$ 222.1	$ 216.3
Cost of services (exclusive of depreciation and amortization)	159.4	158.0
Management Type Contracts
Services revenue	159.5	148.1
Cost of services (exclusive of depreciation and amortization)	107.0	102.8
Lease Type Contracts
Services revenue	62.6	68.2
Cost of services (exclusive of depreciation and amortization)	52.4	55.2
Reimbursed Management Type Contract Revenue
Services revenue	229.8	209.0
Cost of services (exclusive of depreciation and amortization)	$ 229.8	$ 209.0