Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total services revenue	$ 409.4	$ 366.8
Cost of services	356.2	327.4
Gross profit	53.2	39.4
General and administrative expenses	27.1	22.3
Depreciation and amortization	7.2	4.0
Operating income	18.9	13.1
Other expenses (income)
Interest expense	5.0	2.1
Interest income	(0.1)	(0.1)
Equity in earnings from investment in unconsolidated entity	0.0	(10.1)
Total other expenses (income)	4.9	(8.1)
Earnings before income taxes	14.0	21.2
Income tax expense	3.1	5.3
Net income	10.9	15.9
Less: Net income attributable to noncontrolling interest	0.3	0.6
Net income attributable to SP Plus Corporation	$ 10.6	$ 15.3
Net income per common share
Basic (in dollars per share)	$ 0.47	$ 0.69
Diluted (in dollars per share)	$ 0.47	$ 0.68
Weighted average shares outstanding
Basic (in shares)	22,509,050	22,308,694
Diluted (in shares)	22,667,539	22,557,326
Lease type contracts
Total services revenue	$ 97.8	$ 99.5
Cost of services	89.7	94.6
Gross profit	8.1	4.9
Management type contracts
Total services revenue	132.9	94.4
Cost of services	87.8	59.9
Gross profit	45.1	34.5
Lease and Management type contracts
Total services revenue	230.7	193.9
Cost of services	177.5	154.5
Reimbursed management type contract expense
Total services revenue	178.7	172.9
Cost of services	$ 178.7	$ 172.9