Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Services revenue	$ 349.8	$ 246.7
Cost of services (exclusive of depreciation and amortization)	298.4	208.4
General and administrative expenses	24.5	21.0
Depreciation and amortization	6.8	6.3
Operating income	20.1	11.0
Other expense (income)
Interest expense	4.8	5.8
Interest income	(0.2)	(0.1)
Total other expenses	4.6	5.7
Earnings before income taxes	15.5	5.3
Income tax expense	4.2	1.4
Net income	11.3	3.9
Less: Net income attributable to noncontrolling interest	0.6	1.6
Net income attributable to SP Plus Corporation	$ 10.7	$ 2.3
Net income per common share
Basic (in dollars per share)	$ 0.50	$ 0.11
Diluted (in dollars per share)	$ 0.50	$ 0.11
Weighted average shares outstanding
Basic (in shares)	21,226,952	21,113,494
Diluted (in shares)	21,338,299	21,304,068
Lease and Management Type Contracts
Services revenue	$ 184.4	$ 128.7
Cost of services (exclusive of depreciation and amortization)	133.0	90.4
Lease Type Contracts
Services revenue	62.6	42.7
Cost of services (exclusive of depreciation and amortization)	52.0	35.3
Management Type Contracts
Services revenue	121.8	86.0
Cost of services (exclusive of depreciation and amortization)	81.0	55.0
Lease Impairment
Cost of services (exclusive of depreciation and amortization)		0.1
Reimbursed Management Type Contract Revenue
Services revenue	165.4	118.0
Cost of services (exclusive of depreciation and amortization)	$ 165.4	$ 118.0