Domestic and Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Summary of revenues (excluding reimbursed management contract revenue) and gross profit by operating segment

The following is a summary of revenues (excluding reimbursed management contract revenue) and gross profit by operating segment for the years ended December 31, 2017, 2016 and 2015:

	Year Ended December 31,
	2017			Gross Margin		2016			Gross Margin		2015			Gross Margin
Parking services revenue
Region One
Lease contracts	$	433.8				$	420.3				$	447.1
Management contracts	250.0					248.3					238.7
Total Region One	683.8					668.6					685.8
Region Two
Lease contracts	129.3					124.7					123.8
Management contracts	89.1					88.0					100.5
Total Region Two	218.4					212.7					224.3
Other
Lease contracts	—					—					—
Management contracts	9.1					10.5					11.1
Total Other	9.1					10.5					11.1
Reimbursed management contract revenue	679.2					676.6					650.6
Total parking services revenue	$	1,590.5				$	1,568.4				$	1,571.8
Gross Profit
Region One
Lease contracts	35.8			8.3	%	32.6			7.8	%	35.8			8.0	%
Management contracts	96.9			38.8	%	95.7			38.5	%	93.7			39.3	%
Total Region One	132.7					128.3					129.5
Region Two
Lease contracts	6.7			5.2	%	5.7			4.5	%	5.4			4.4	%
Management contracts	26.2			29.2	%	24.6			28.0	%	24.9			20.0	%
Total Region Two	32.9					30.3					30.3
Other
Lease contracts	2.2			—	%	1.1			—	%	(3.1		)	11.8	%
Management contracts	17.5			192.3	%	16.7			159.0	%	13.4			120.5	%
Total Other	19.7					17.8					10.3
Total gross profit	185.3					176.4					170.1
General and administrative expenses	82.9					90.0					97.3
General and administrative expense percentage of gross profit	44.7		%			51.0		%			57.0		%
Depreciation and amortization	21.0					33.7					34.0
Operating income	81.4					52.7					38.8
Other expenses (income):
Interest expense	9.2					10.5					12.7
Interest income	(0.6		)			(0.5		)			(0.2		)
Gain on sale of a business	(0.1		)			—					(0.5		)
Equity in losses from investment in unconsolidated entity	0.7					0.9					1.7
Total other expenses	9.2					10.9					13.7
Earnings before income taxes	72.2					41.8					25.1
Income tax expense	27.7					15.8					4.8
Net income	44.5					26.0					20.3
Less: Net income attributable to noncontrolling interest	3.3					2.9					2.9
Net income attributable to SP Plus Corporation	$	41.2				$	23.1				$	17.4