Net Income per Common Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule of reconciliation of the weighted average basic common shares outstanding to weighted average diluted common shares outstanding

A reconciliation of the weighted average basic common shares outstanding to the weighted average diluted common shares outstanding is as follows:

	Three Months Ended				Nine Months Ended
(millions, except for share and per share data) (unaudited)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Net income attributable to SP Plus Corporation	$	7.0	$	3.7	$	13.5	$	14.8
Basic weighted average common shares outstanding	22,208,139		22,205,707		22,293,776		22,159,701
Dilutive impact of share-based awards	288,972		342,459		278,157		360,117
Diluted weighted average common shares outstanding	22,497,111		22,548,166		22,571,933		22,519,818
Net income per common share
Basic	$	0.31	$	0.17	$	0.60	$	0.67
Diluted	$	0.31	$	0.16	$	0.60	$	0.66