Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of unaudited quarterly results

	2016												2015
(millions, except for share and per share data)	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			First Quarter			Second Quarter			Third Quarter			Fourth Quarter
	(Unaudited)												(Unaudited)
Parking services revenue
Lease contracts	$	138.5		$	135.7		$	136.1		$	134.7		$	135.8		$	146.4		$	146.6		$	142.1
Management contracts	91.2			86.7			84.1			84.8			94.1			88.3			85.8			82.1
Reimbursed management contract revenue	167.9			180.2			188.9			186.7			174.3			170.9			168.3			181.2
Total revenue	397.6			402.6			409.1			406.2			404.2			405.6			400.7			405.4
Cost of parking services
Lease contracts	130.6			124.0			125.8			125.2			128.7			134.5			136.0			133.6
Management contracts	60.7			51.4			50.5			47.2			60.0			53.8			53.6			50.9
Reimbursed management contract expense	167.9			180.2			188.9			186.7			174.3			170.9			168.3			181.2
Total cost of parking services	359.2			355.6			365.2			359.1			363.0			359.2			357.9			365.7
Gross profit
Lease contracts	7.9			11.7			10.3			9.5			7.1			11.9			10.6			8.5
Management contracts	30.5			35.3			33.6			37.6			34.1			34.5			32.2			31.2
Total gross profit	38.4			47.0			43.9			47.1			41.2			46.4			42.8			39.7
General and administrative expenses	24.6			22.1			20.3			23.0			25.7			24.7			23.8			23.1
Depreciation and amortization	9.2			9.8			7.8			6.9			7.9			8.2			8.2			9.7
Operating income	4.6			15.1			15.8			17.2			7.6			13.5			10.8			6.9
Other expense (income)
Interest expense	2.8			2.6			2.7			2.4			4.0			3.0			3.0			2.7
Interest income	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	—			—			(0.1		)
Gain on sale of business	—			—			—			—			—			—			(0.5		)	—
Equity in losses (income) from investment in unconsolidated entity	0.5			0.3			0.4			(0.3		)	0.5			0.3			0.4			0.5
Total other expenses (income)	3.1			2.8			3.0			2.0			4.4			3.3			2.9			3.1
Earnings (loss) before income taxes	1.5			12.3			12.8			15.2			3.2			10.2			7.9			3.8
Income tax expense (benefit)	0.9			4.9			5.1			4.9			1.3			(0.4		)	3.5			0.4
Net income	0.6			7.4			7.7			10.3			1.9			10.6			4.4			3.4
Less: Net income attributable to noncontrolling interest	0.6			0.9			0.7			0.7			0.5			0.8			0.8			0.8
Net income attributable to SP Plus Corporation	$	—		$	6.5		$	7.0		$	9.6		$	1.4		$	9.8		$	3.6		$	2.6
Common stock data
Net income per share*
Basic	$	—		$	0.29		$	0.31		$	0.44		$	0.06		$	0.44		$	0.17		$	0.11
Diluted	$	—		$	0.29		$	0.31		$	0.43		$	0.06		$	0.43		$	0.16		$	0.11
Weighted average shares outstanding
Basic	22,328,578			22,344,898			22,208,139			22,071,865			22,127,725			22,145,190			22,205,707			22,276,763
Diluted	22,593,505			22,625,471			22,497,111			22,398,045			22,528,608			22,521,832			22,548,166			22,486,888

* Basic and diluted earnings per share are computed independently for each of the quarters presented. As a result, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.