Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	May. 03, 2016
Document and Entity Information
Entity Registrant Name	SP Plus Corp
Entity Central Index Key	0001059262
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)		22,355,171
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1