Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Parking services revenue
Lease contracts	$ 146,618	$ 129,004	$ 428,887	$ 370,597
Management contracts	85,813	77,878	268,176	252,764
Reimbursed management contract revenue	168,332	173,405	513,469	507,122
Total revenue	400,763	380,287	1,210,532	1,130,483
Cost of parking services
Lease contracts	135,966	116,520	399,133	340,583
Management contracts	53,629	46,741	167,469	155,971
Reimbursed management contract expense	168,332	173,405	513,469	507,122
Total cost of parking services	357,927	336,666	1,080,071	1,003,676
Gross profit
Lease contracts	10,652	12,484	29,754	30,014
Management contracts	32,184	31,137	100,707	96,793
Total gross profit	42,836	43,621	130,461	126,807
General and administrative expenses	23,752	24,123	74,164	75,185
Depreciation and amortization	8,275	7,630	24,374	22,523
Operating income	10,809	11,868	31,923	29,099
Other expenses (income)
Interest expense	2,954	4,162	10,059	13,782
Interest income	(46)	(144)	(146)	(336)
Gain on sale of a business	(508)		(508)
Equity in losses from investment in unconsolidated entity	408		1,232
Total other expenses (income)	2,808	4,018	10,637	13,446
Income before income taxes	8,001	7,850	21,286	15,653
Income tax provision (benefit)	3,516	2,763	4,466	(421)
Net income	4,485	5,087	16,820	16,074
Less: Net income attributable to noncontrolling interest	778	785	2,014	2,162
Net income attributable to SP Plus Corporation	$ 3,707	$ 4,302	$ 14,806	$ 13,912
Net income per share
Basic (in dollars per share)	$ 0.17	$ 0.20	$ 0.67	$ 0.63
Diluted (in dollars per share)	$ 0.16	$ 0.19	$ 0.66	$ 0.62
Weighted average shares outstanding
Basic (in shares)	22,205,707	21,997,394	22,159,701	21,989,131
Diluted (in shares)	22,548,166	22,426,787	22,519,818	22,392,572