Central Parking Finance Trust PFD TR CV SECS (CRLKP) 10-K 1 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Feb. 29, 2016	Jun. 30, 2015
Document and Entity Information
Entity Registrant Name	SP Plus Corp
Entity Central Index Key	1,059,262
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 578.5
Entity Common Stock, Shares Outstanding		22,328,578
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 18.7	$ 18.2
Notes and accounts receivable, net	105.1	109.3
Prepaid expenses and other	13.9	17.8
Deferred taxes	12.3	10.9
Total current assets	150	156.2
Leasehold improvements, equipment, land and construction in progress, net	34.6	42.8
Other assets
Advances and deposits	5	6.7
Other intangible assets, net	75.9	91
Favorable acquired lease contracts, net	38.1	48.3
Equity investments in unconsolidated entities	19	20.7
Other assets, net	18.3	14
Cost of contracts, net	11.9	10.5
Goodwill	431.3	432.9
Total other assets	599.5	624.1
Total assets	784.1	823.1
Liabilities and stockholders' equity
Accounts payable	95.1	106.5
Accrued rent	22.9	22.1
Compensation and payroll withholdings	21	22
Property, payroll and other taxes	8.6	11.7
Accrued insurance	19.4	22
Accrued expenses	25.4	26
Current portion of long-term obligations under credit facility and other long-term borrowings	15.2	14.5
Total current liabilities	207.6	224.8
Deferred taxes	0	5.8
Long-term borrowings, excluding current portion
Obligations under credit facility	209.4	235.5
Other long-term borrowings	0.5	0.8
Long-term borrowings, excluding current portion	209.9	236.3
Unfavorable acquired lease contracts, net	50.3	61.4
Other long-term liabilities	66.2	65
Total noncurrent liabilities	326.4	368.5
Stockholders' equity
Preferred Stock, par value $0.01 per share; 5,000,000 shares authorized as of December 31, 2015 and 2014; no shares issued	0	0
Common stock, par value $0.001 per share; 50,000,000 shares authorized as of December 31, 2015 and 2014; 22,328,578 and 22,127,725 shares issued and outstanding as of December 31, 2015 and 2014, respectively	0	0
Additional paid-in capital	247.9	243.9
Accumulated other comprehensive loss	(1.1)	(0.2)
Retained earnings (accumulated deficit)	2.8	(14.6)
Total SP Plus Corporation stockholders' equity	249.6	229.1
Noncontrolling interest	0.5	0.7
Total shareholders' equity	250.1	229.8
Total liabilities and stockholders' equity	$ 784.1	$ 823.1

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,328,578	22,328,578
Common stock shares outstanding	22,127,725	22,127,725

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Parking services revenue
Lease contracts	$ 570.9	$ 496.6	$ 489.6
Management contracts	350.3	338.3	347.3
Total parking services revenue	921.2	834.9	836.9
Reimbursed management contract revenue	694.7	679.8	629.9
Total revenue	1,615.9	1,514.7	1,466.8
Cost of parking services
Lease contracts	532.8	455.7	456.1
Management contracts	218.3	207.9	208.7
Total cost of parking services, gross	751.1	663.6	664.8
Reimbursed management contract expense	694.7	679.8	629.9
Total cost of parking services	1,445.8	1,343.4	1,294.7
Gross profit
Lease contracts	38.1	40.9	33.5
Management contracts	132	130.4	138.6
Total gross profit	170.1	171.3	172.1
General and administrative expenses	97.3	101.5	98.9
Depreciation and amortization	34	30.3	31.2
Operating income	38.8	39.5	42
Other expense (income)
Interest expense	12.7	17.8	19
Interest income	(0.2)	(0.4)	(0.6)
Gain on sale of a business	(0.5)	0	0
Gain on contribution of a business to an unconsolidated entity	0	(4.1)	0
Equity in losses from investment in unconsolidated entity	1.7	0.3	0
Total other expenses (income)	13.7	13.6	18.4
Earnings before income taxes	25.1	25.9	23.6
Income tax expense (benefit)	4.8	(0.2)	8.8
Net income	20.3	26.1	14.8
Less: Net income attributable to noncontrolling interest	2.9	3	2.7
Net income attributable to SP Plus Corporation	$ 17.4	$ 23.1	$ 12.1
Net income per common share
Basic (in dollars per share)	$ 0.78	$ 1.05	$ 0.55
Diluted (in dollars per share)	$ 0.77	$ 1.03	$ 0.54
Weighted average shares outstanding
Basic (in shares)	22,189,140	22,009,800	21,902,870
Diluted (in shares)	22,511,759	22,407,343	22,249,584

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 20.3	$ 26.1	$ 14.8
Other comprehensive income (expense)	(0.9)	(0.3)	0.5
Comprehensive income	19.4	25.8	15.3
Less: Comprehensive income attributable to noncontrolling interest	2.9	3	2.7
Comprehensive income attributable to SP Plus Corporation	$ 16.5	$ 22.8	$ 12.6

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Noncontrolling Interest
Beginning balance (deficit) at Dec. 31, 2012	$ 187	$ 0	$ 236.4	$ (0.4)	$ (49.8)	$ 0.8
Beginning balance (in shares) at Dec. 31, 2012		21,870,770
Increase (Decrease) in Stockholders' Equity
Net income	14.8				12.1	2.7
Foreign currency translation adjustments	(0.5)			(0.5)
Effective portion of cash flow hedge	1			1
Shares issued—Central Merger	0
Issuance of stock grants	0
Issuance of stock grants (in shares)		15,576
Vested restricted stock units	$ 0
Vested restricted stock units (in shares)		90,965
Proceeds from exercise of stock options (in shares)	0
Non-cash stock-based compensation related to restricted stock units and performance share units	$ 4.1		4.1
Tax benefit from vesting of restricted stock	0.2		0.2
Distribution to noncontrolling interest	(2.8)					(2.8)
Ending balance (deficit) at Dec. 31, 2013	203.7	$ 0	240.7	0.1	(37.7)	0.6
Ending balance (in shares) at Dec. 31, 2013		21,977,311
Increase (Decrease) in Stockholders' Equity
Net income	26.1				23.1	3
Foreign currency translation adjustments	(0.2)			(0.2)
Effective portion of cash flow hedge	(0.2)			(0.2)
Issuance of stock grants	$ 0.5		0.5
Issuance of stock grants (in shares)		19,336
Vested restricted stock units (in shares)		131,078
Proceeds from exercise of stock options (in shares)	0
Non-cash stock-based compensation related to restricted stock units and performance share units	$ (2.8)		2.8
Tax benefit from vesting of restricted stock	(0.1)		(0.1)
Distribution to noncontrolling interest	(2.9)					(2.9)
Ending balance (deficit) at Dec. 31, 2014	$ 229.8	$ 0	243.9	(0.2)	(14.6)	0.7
Ending balance (in shares) at Dec. 31, 2014	22,127,725	22,127,725
Increase (Decrease) in Stockholders' Equity
Net income	$ 20.3				17.4	2.9
Foreign currency translation adjustments	(0.7)			(0.7)
Effective portion of cash flow hedge	(0.2)			(0.2)
Issuance of stock grants	0.7		0.7
Issuance of stock grants (in shares)		29,305
Vested restricted stock units	0
Vested restricted stock units (in shares)		164,447
Proceeds from exercise of stock options	0
Proceeds from exercise of stock options (in shares)		7,101
Non-cash stock-based compensation related to restricted stock units and performance share units	3		3
Tax benefit from vesting of restricted stock	0.3		0.3
Distribution to noncontrolling interest	(3.1)					(3.1)
Ending balance (deficit) at Dec. 31, 2015	$ 250.1	$ 0	$ 247.9	$ (1.1)	$ 2.8	$ 0.5
Ending balance (in shares) at Dec. 31, 2015	22,127,725	22,328,578

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 20.3	$ 26.1	$ 14.8
Adjustments to reconcile net income to net cash provided by operations:
Adjustments to reconcile net income to net cash provided by operating activities:	34.1	30.4	29.5
Net (accretion) amortization of acquired lease contracts	(0.9)	(1)	(4.3)
(Gain) loss on sale of equipment	0.4	(0.3)	1.6
(Gain) loss on sale of equity interest in land	0	0	(1.2)
(Gain) loss on sale of business	(0.5)	0	0
Amortization of debt issuance costs	0.9	1.3	1.4
Amortization of original discount on borrowings	1.2	1.2	1.3
Non-cash stock-based compensation	3.7	3.3	4.2
Provision for losses on accounts receivable	0.7	0.7	0.2
Excess tax (benefit) expense related to vesting of restricted stock units	(0.3)	0.1	(0.2)
Gain on contribution of a business to an unconsolidated entity	0	(4.1)	0
Deferred income taxes	(9.7)	(12.1)	2.7
Changes in operating assets and liabilities
Notes and accounts receivable	3.5	5.4	(3.8)
Prepaid assets	3.7	2.6	7.4
Other assets	4.4	(0.5)	(3.1)
Accounts payable	(11.4)	(9)	(13.5)
Accrued liabilities	(6.5)	7.5	(2.1)
Net cash provided by operating activities	43.6	51.6	34.9
Investing activities
Purchase of leasehold improvements and equipment	(9.6)	(13.5)	(15.7)
Proceeds from sale of equipment and contract terminations	0.5	0.9	0.8
Cash received from sale of business, net	1	0	0
Proceeds from sale of equity interest in land	0	0	2.3
Cost of contracts purchased	(3.7)	(2.3)	(0.4)
Contingent payments for businesses acquired	0	0	(0.3)
Net cash used in investing activities	(11.8)	(14.9)	(13.3)
Financing activities
Contingent payments for businesses acquired	(0.1)	(1.8)	(0.6)
Payments on senior credit facility revolver (Senior Credit Facility and Restated Credit Facility)	(460.9)	(572.6)	(491.6)
Proceeds from senior credit facility revolver (Senior Credit Facility and Restated Credit Facility)	439.5	568	491.5
Proceeds from term loan (Restated Credit Facility)	10.4	0	0
Payments on term loan (Senior Credit Facility and Restated Credit Facility)	(15)	(32.3)	(22.5)
Proceeds from (payments on) other long-term borrowings	(0.3)	0.2	(0.6)
Distribution to noncontrolling interest	(3.1)	(2.9)	(2.8)
Payments of debt issuance costs and original discount on borrowings	(1.4)	0	0
Excess tax (benefit) expense related to vesting of restricted stock units	0.3	(0.1)	0.2
Net cash used in financing activities	(30.6)	(41.5)	(26.4)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	(0.2)	(0.5)
Increase (decrease) in cash and cash equivalents	0.5	(5)	(5.3)
Cash and cash equivalents at beginning of year	18.2	23.2	28.5
Cash and cash equivalents at end of year	18.7	18.2	23.2
Cash paid during the period for
Interest	10.7	13.9	16.3
Income taxes, net	$ 18.1	$ 1.3	$ 1.3

Significant Accounting Policies

Significant Accounting Policies and Practices	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies and Practices	Significant Accounting Policies and Practices The Company SP Plus Corporation (the "Company") provides parking management, ground transportation and other ancillary services to commercial, institutional and municipal clients in urban markets and airports across the United States, Puerto Rico and Canada. These services include a comprehensive set of on-site parking management and ground transportation services, which include facility maintenance, training, scheduling and supervising all service personnel as well as providing customer service, marketing, and accounting and revenue control functions necessary to facilitate the operation of clients' facilities. The Company also provides a range of ancillary services such as airport shuttle operations, valet services, taxi and livery dispatch services and municipal meter revenue collection and enforcement services. Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly owned subsidiaries, and Variable Interest Entities ("VIEs") in which the Company is the primary beneficiary. All significant intercompany profits, transactions and balances have been eliminated in consolidation. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current environment. Foreign Currency Translation The functional currency of the Company's foreign operations is the local currency. Accordingly, assets and liabilities of the Company's foreign operations are translated from foreign currencies into U.S. dollars at the rates in effect on the balance sheet date while income and expenses are translated at the weighted-average exchange rates for the year. Adjustments resulting from the translations of foreign currency financial statements are accumulated and classified as a separate component of stockholders' equity. Cash and Cash Equivalents Cash equivalents represent funds temporarily invested in money market instruments with maturities of three months or less. Cash equivalents are stated at cost, which approximates fair value. Cash and cash equivalents that are restricted as to withdrawal or use under the terms of certain contractual agreements was $0.9 million and $0.5 million as of December 31, 2015 and 2014 , respectively, and are included within Cash and cash equivalents within the Consolidated Balance Sheet. Allowance for Doubtful Accounts Accounts receivable, net of the allowance for doubtful accounts, represents the Company's estimate of the amount that ultimately will be realized in cash. Management reviews the adequacy of its allowance for doubtful accounts on an ongoing basis, using historical collection trends, aging of receivables, and a review of specific accounts, and makes adjustments in the allowance as necessary. Changes in economic conditions or other circumstances could have an impact on the collection of existing receivable balances or future allowance considerations. As of December 31, 2015 and 2014 , the Company's allowance for doubtful accounts was $0.9 million and $1.0 million, respectively. Leasehold Improvements, Equipment, Land and Construction in Progress, net Leasehold improvements, equipment, software, vehicles, and other fixed assets are stated at cost less accumulated depreciation and amortization. Equipment is depreciated on the straight-line basis over the estimated useful lives ranging from 2 to 10 years. Expenditures for major renewals and improvements that extend the useful life of property and equipment are capitalized. Leasehold improvements are amortized on the straight-line basis over the terms of the respective leases or the service lives of the improvements, whichever is shorter (weighted average remaining life of approximately 8.2 years). Certain costs associated with directly obtaining, developing or upgrading internal-use software are capitalized and amortized over the estimated useful life of software. Cost of Contracts Cost of contracts represents the cost of obtaining contractual rights associated with providing parking services at a managed or leased facility. Cost of parking contracts are amortized over the estimated life of the contracts, including anticipated renewals and terminations. Estimated lives are based on the contract life or anticipated lives of the contract. Goodwill and Other Intangibles Goodwill represents the excess of purchase price paid over the fair value of net assets acquired. In accordance with the Financial Accounting Standards Board's ("FASB") authoritative accounting guidance on goodwill, the Company does not amortize goodwill but rather evaluates it for impairment on an annual basis, or more often if events or circumstances change that could cause goodwill to become impaired. The Company has elected to assess the impairment of goodwill annually on the first day of its fiscal fourth quarter, or at an interim date if there is an event or change in circumstances indicate the carrying value may not be recoverable. Factors that could trigger an impairment review include significant under-performance relative to expected historical or projected future operating results, significant changes in the use of acquired assets or its business strategy, and significant negative industry or economic trends. A multi-step impairment test is performed on goodwill. The Company has the option to evaluate various qualitative factors to determine the likelihood of impairment. If determined that it is more likely than not the fair value is less than the carrying value of a reporting unit, then the Company is required to perform Step 1. If the Company does not elect to perform a qualitative assessment, it can voluntarily proceed directly to Step 1. In Step 1, the Company performs a quantitative analysis to compare the fair value of the reporting unit to its carrying value including goodwill. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not considered impaired, and the Company's is not required to perform further testing. If the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, then the Company must perform Step 2 of t he impairment test in order to determine the implied fair value of the reporting unit's goodwill. If the carrying value of a reporting unit's goodwill exceeds its implied fair value, then the Company would record an impairment loss equal to the difference. The goodwill impairment test is performed at the reporting unit level; the Company's reporting units represent its operating segments, consisting of the North reporting unit, South reporting unit, NY Metropolitan tri-state area of New York, New Jersey and Connecticut reporting unit, Airport transportation services reporting unit, USA Parking reporting unit and event planning and transportation services reporting unit. The December 31, 2015 goodwill balances by reportable segment are presented in detail in Note. 9 Goodwill. Management determines the fair value of each of its reporting units by using a discounted cash flow approach and a market approach using multiples of EBITDA of comparable companies to estimate market value. In addition, the Company compares its derived enterprise value on a consolidated basis to the Company's market capitalization as of its test date to ensure its derived value approximates the market value of the Company when taken as a whole. In conducting its goodwill impairment quantitative assessment, the Company analyzed actual and projected growth trends of the reporting unit, gross margin, operating expenses and EBITDA (which also includes forecasted five -year income statement and working capital projections, a market-based weighted average cost of capital and terminal values after five years). The Company also assesses critical areas that may impact its business including economic conditions, market related exposures, competition, changes in product offerings and changes in key personnel for each of its reporting unit's. As part of the 2015 and 2014 annual goodwill assessments, the Company engaged a third party to evaluate its reporting unit's fair values. The Company will continue to perform a goodwill impairment test as required on an annual basis and on an interim basis, if certain conditions exist. Factors the Company considers important, which could result in changes to its estimates, include under-performance relative to historical or projected future operating results and declines in acquisitions and trading multiples. Due to the broad customer base, the Company does not believe its future operating results will vary significantly relative to its historical and projected future operating results. However, future events may indicate differences from its judgments and estimates which could, in turn, result in impairment charges in the future. Future events that may result in impairment charges include increases in interest rates, which would impact discount rates, unfavorable economic conditions or other factors which could decrease revenues and profitability of existing locations and changes in the cost structure of existing facilities. Factors that could potentially have an unfavorable economic effect on management's judgments and estimates include, among others: changes imposed by governmental and regulatory agencies, such as property condemnations and assessment of parking-related taxes; construction or other events that could change traffic patterns; and terrorism or other catastrophic events. Intangible assets with finite lives are amortized over their estimated useful lives and reviewed for impairment when circumstances change that would create a triggering event. Intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives. The Company evaluates the remaining useful life of the other intangible assets on a periodic basis to determine whether events or circumstances warrant a revision to the remaining useful life. Assumptions and estimates about future values and remaining useful lives of its intangible and other long-lived assets are complex and subjective. They can be affected by a variety of factors, including external factors such as industry and economic trends, and internal factors, such as changes in its business strategy and internal forecasts. Although management believes the historical assumptions and estimates are reasonable and appropriate, different assumptions and estimates could materially impact its reported financial results. Long-Lived Assets The Company evaluates long-lived asset groups whenever events or circumstances indicate that the carrying value of an asset or asset group may not be recoverable. Events or circumstances that would result in an impairment review primarily include a significant change in the use of an asset, or the planned sale or disposal of an asset. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the asset to future undiscounted cash flows expected to be generated by the asset group. If it is determined to be impaired, the impairment recognized is measured by the amount by which the carrying value of the asset exceeds its fair value. The Company's estimates of future cash flows from such assets could be impacted if it underperforms relative to historical or projected future operating results. Assumptions and estimates used to determine cash flows in the evaluation of impairment and the fair values used to determine the impairment are subject to a degree of judgment and complexity. Any changes to the assumptions and estimates resulting from changes in actual results or market conditions from those anticipated may affect the carrying value of long-lived assets and could result in an impairment charge. Debt Issuance Costs The costs of obtaining financing are capitalized and amortized as interest expense over the term of the respective financing using the effective interest method. Pursuant to ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30), adopted by the Company on December 31, 2015 , debt issuance costs of $2.4 million and $2.6 million at December 31, 2015 , and 2014 , respectively, are recorded as a direct deduction from the carrying amount of the Company's debt balance within the Consolidated Balance Sheets and are reflected net of accumulated amortization of $8.2 million and $7.3 million respectively. Amortization expense related to debt issuance costs and included in interest expense within the Consolidated Statements of Income was $0.9 million, $1.3 million and $1.5 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Financial Instruments The carrying values of cash, accounts receivable and accounts payable approximate their fair value due to the short-term nature of these financial instruments. Book overdrafts of $25.8 million and $30.8 million are included within Accounts payable within the Consolidated Balance Sheets as of December 31, 2015 , and 2014 , respectively. Long-term debt has a carrying value that approximates fair value because these instruments bear interest at variable market rates. Insurance Reserves The Company purchases comprehensive casualty insurance covering certain claims that arise in connection with its operations. In addition, the Company purchases umbrella/excess liability coverage. Under our various liability and workers' compensation insurance policies, the Company is obligated to pay directly or reimburse the insurance carrier for the first $0.5 million of each loss covered by its general/garage liability or automobile liability policies and $0.3 million for each loss covered by its workers' compensation and garage keepers legal liability policies. As a result, the Company is, in effect, self-insured for all claims up to these levels. The Company applies the provisions as defined in the guidance related to accounting for contingencies, in determining the timing and amount of expense recognition associated with claims against the Company. The expense recognition is based upon the Company's determination of an unfavorable outcome of a claim being deemed as probable and capable of being reasonably estimated, as defined in the guidance related to accounting for contingencies. This determination requires the use of judgment in both the estimation of probability and the amount to be recognized as an expense. The Company utilizes historical claims experience along with regular input from third party insurance advisers in determining the required level of insurance reserves. Future information regarding historical loss experience may require changes to the level of insurance reserves and could result in increased expense recognition in the future. Legal and Other Commitments and Contingencies The Company is subject to litigation in the normal course of its business. The Company applies the provisions as defined in the guidance related to accounting for contingencies in determining the recognition and measurement of expense recognition associated with legal claims against the Company. Management uses guidance from internal and external legal counsel on the potential outcome of litigation in determining the need to record liabilities for potential losses and the disclosure of pending legal claims. Certain lease contracts acquired in the Central Merger include provisions allocating to the Company responsibility for the cost of certain structural and other repairs required to be made to the leased property, including improvement and repair costs arising as a result of ordinary wear and tear. The Company recorded $4.6 million , $1.3 million and $nil for the year ended December 31, 2015, 2014 and 2013, respectively, of costs (net of expected recoveries of the total cost recognized by the Company through the applicable indemnity discussed further in Note 2. Acquisition ) in Cost of parking services-Lease contracts within the Consolidated Statements of Income for structural and other repair costs related to certain lease contracts acquired in the Central Merger, whereby the Company has expensed repair costs for certain leases and engaged third-party general contractors to complete certain structural and other repair projects, and other indemnity related costs. The Company expects to incur additional costs for certain structural and other repair costs pursuant to the contractual requirements of certain lease contracts acquired in the Central Merger ("Structural and Repair Costs"). Based on information available at this time, the Company currently expects to incur additional Structural and Repair Costs of $1.5 million . While the Company is unable to estimate with certainty when such remaining costs will be incurred, it is expected that a substantial majority of these costs will be incurred in early- to mid-calendar year 2016. The Company currently expects to recover 80% of the Structural and Repair Costs incurred and related to certain lease contracts acquired in the Central Merger through the applicable indemnity discussed further in Note 2. Acquisition. Interest Rate Swaps In October 2012, the Company entered into Interest Rate Swap transactions (collectively, the "Interest Rate Swaps") with each of JPMorgan Chase Bank, N.A., Bank of America, N.A. and PNC Bank, N.A. in an initial aggregate Notional Amount of $150.0 million (the "Notional Amount"). The Interest Rate Swaps have a termination date of September 30, 2017. The Interest Rate Swaps effectively fix the interest rate on an amount of variable interest rate borrowings under the Company's credit agreements, originally equal to the Notional Amount at 0.7525% per annum plus the applicable margin rate for LIBOR loans under the Company's credit agreements determined based upon the Company's consolidated total debt to EBITDA ratio. The Notional Amount is subject to scheduled quarterly amortization that coincides with quarterly prepayments of principal under the credit agreements. These Interest Rate Swaps are classified as cash flow hedges, and the Company calculates the effectiveness of the hedge on a monthly basis. The ineffective portion of the cash flow hedge is recognized in earnings as an increase to interest expense. As of December 31, 2015 , no ineffective portion of cash flow hedges has been recognized in interest expense. See Note 10. Fair Value Measurement for the fair value of the interest rate swap for the year ended December 31, 2015 and 2014 . The Company does not enter into derivative instruments for any purpose other than cash flow hedging purposes. Parking Services Revenue The Company's revenues are primarily derived from leased locations, managed properties and the providing of ancillary services, such as accounting, payments received for exercising termination rights, consulting development fees, gains on sales of contracts, insurance (general, workers' compensation and health care) and other value-added services. In accordance with the guidance related to revenue recognition, revenue is recognized when persuasive evidence of an arrangement exists, the fees are fixed or determinable, and collectability is reasonably assured and as services are provided. The Company recognizes gross receipts (net of taxes collected from customers) as revenue from leased locations, and management fees for parking services, as the related services are provided. Ancillary services are earned from management contract properties and are recognized as revenue as those services are provided. Cost of Parking Services The Company recognizes costs for leases, non-reimbursed costs from managed facilities and reimbursed expense as cost of parking services. Cost of parking services consists primarily of rent and payroll related costs. Reimbursed Management Contract Revenue and Expense The Company recognizes as both revenues and expenses, in equal amounts, costs incurred by the Company that are directly reimbursed from its management clients. The Company has determined it is the principal in these transactions, as defined in Accounting Standard Codification (ASC) 605-45 P rincipal Agent Considerations , based on the indicators of gross revenue reporting. As the principal, the Company is the primary obligor in the arrangement, has latitude in establishing price, discretion in supplier selection, and the Company assumes credit risk. Advertising Costs Advertising costs are expensed as incurred and are included in General and administrative expenses within the Consolidated Statements of Income. Advertising expenses aggregated $1.6 million, $1.3 million, and $1.0 million for 2015 , 2014 , and 2013 , respectively. Stock-Based Compensation Share based payments to employees including grants of employee stock options, restricted stock units and performance-based share units are measured at the grant date, based on the estimated fair value of the award, and the related expense is recognized over the requisite employee service period or performance period (generally the vesting period) for awards expected to vest (considering estimated forfeitures). Equity Investment in Unconsolidated Entities The Company has ownership interests in 38 partnerships, joint ventures or similar arrangements which operate parking facilities, of which 27 are VIEs and 11 are voting interest model entities where the Company's ownership interests range from 30 - 50 percent and for which there are no indicators of control. The Company accounts for such investments under the equity method of accounting, and its underlying share of each investee's equity is included in Equity Investment in Unconsolidated Entities within the Consolidated Balance Sheets. As the operations of these entities are consistent with the Company's underlying core business operations, the equity in earnings of these investments are included in Parking Services Revenue - Lease Contracts within the Consolidated Statements of Income. The equity earnings in these related investments were $2.0 million, $1.9 million, and $2.1 million for the year ended December 31, 2015 , 2014 and 2013 , respectively. In October 2014, the Company entered into an agreement to establish a joint venture with Parkmobile USA, Inc. ("Parkmobile USA") and contributed all of the assets and liabilities of its proprietary Click and Park parking prepayment business in exchange for a 30 percent interest in the newly formed legal entity called Parkmobile, LLC ("Parkmobile"). The joint venture of Parkmobile provides on-demand and prepaid transaction processing for on- and off-street parking and transportation services. The contribution of the Click and Park business in the joint venture resulted in a loss of control of the business, and therefore it was deconsolidated from the Company's financial statements. As a result of the deconsolidation, the Company recognized a pre-tax gain of $4.1 million, which was measured as the fair value of the consideration received in the form of a 30 percent interest in Parkmobile less the carrying amount of the former business' net assets, including goodwill. The pre-tax gain is reflected in Gain on a sale of business within the Consolidated Statements of Income. The Company accounts for its investment in the joint venture with Parkmobile using the equity method of accounting, and its underlying share of equity in Parkmobile is included in Equity investments in unconsolidated entities within the Consolidated Balance Sheets. The equity earnings in the Parkmobile joint venture are included in Equity Investments in Unconsolidated Entities within the Consolidated Statements of Income. Non-Controlling Interests Noncontrolling interests represent the noncontrolling holders' percentage share of income or losses from the subsidiaries in which the Company holds a majority, but less than 100 percen t, ownership interest and the results of which are consolidated and included within in our consolidated financial statements. Sale of Business During the third quarter 2015, the Company signed an agreement to sell and subsequently sold portions of the Company’s security business primarily operating in the Southern California market to a third-party for a gross sales price of $1.8 million , which resulted in a gain on sale of business of $0.5 million , net of legal and other expenses. The pre-tax gain is reflected in Gain on sale of a business within the Consolidated Statements of Income. The assets under the sale agreement met the definition of a business as defined by ASU 805-10-55-4. Cash consideration received during the third quarter 2015, net of legal and other expenses, was $1.0 million with the remaining consideration for the sale of the business being classified as contingent consideration, which per the sale agreement is based on the performance of the business and retention of current customers over an eighteen -month period, and due from the buyer in February 2017. The contingent consideration was valued at fair value as of the date of sale of the business and resulted in the Company recognizing a contingent consideration receivable from the buyer in the amount of $0.5 million . The pre-tax profit for the operations of the sold business was not significant to prior periods presented. See Note 10. Fair Value Measurement for the fair value of the contingent consideration receivable as of December 31, 2015. Income Taxes Income tax expense involves management judgment as to the ultimate resolution of any tax issues. Historically, our assessments of the ultimate resolution of tax issues have been reasonably accurate. The current open issues are not dissimilar from historical items. Deferred income taxes are computed using the asset and liability method, such that deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between financial reporting amounts and the tax bases of existing assets and liabilities based on currently enacted tax laws and tax rates in effect for the periods in which these temporary differences are expected to reverse or settle. Income tax expense is the tax payable for the period plus the change during the period in deferred income taxes. The Company has certain state net operating loss carry forwards which expire in 2035. The Company's ability to fully utilize these net operating losses to offset state taxable income is limited due to the change in ownership resulting from the initial public offering of our stock in 2004 (Internal Revenue Code, Section 382). The Company considers a number of factors in its assessment of the recoverability of its net operating loss carryforwards including their expiration dates, the limitations imposed due to the change in ownership as well as future projections of income. Future changes in the Company's operating performance along with these considerations may significantly impact the amount of net operating losses ultimately recovered, and its assessment of their recoverability. When evaluating our tax positions, the Company accounts for uncertainty in income taxes in its consolidated financial statements. The evaluation of a tax position is a two-step process, the first step being recognition. The Company determines whether it is more-likely-than-not that a tax position will be sustained upon tax examination, including resolution of any related appeals or litigation, based on only the technical merits of the position. If a tax position does not meet the more-likely-than-not threshold, the benefit of that position is not recognized in our financial statements. The second step is measurement. The tax position is measured as the largest amount of benefit that is more-likely-than-not of being realized upon ultimate resolution with a taxing authority. Recent Accounting Pronouncements Adopted Accounting Pronouncements In April 2015, the Financial Accounting Standards Board ("the FASB") issued Accounting Standards Update ("ASU") No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs . ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. ASU 2015-03 requires retrospective application and represents a change in accounting principle. ASU 2015-03 is effective for fiscal years beginning after December 15, 2015 with early adoption being permitted for financial statements that have not been previously issued. The Company adopted ASU 2015-03 in December 2015 on a retrospective basis and reclassified debt issuance costs from Other assets to a direct reduction from the carrying amount of the (i) Current portion of obligations under the Restated Senior Credit Facility borrowings and (ii) Long-term obligations under the Restated Credit Facility borrowings within the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014. See Note 11. Borrowing Arrangements for further detail on the Company's debt instruments. Accounting Pronouncements to be Adopted In February 2016, the FASB issued ASU No. 2016-2, Leases (Topic 842). ASU 2016-2 requires lessees to move most leases to the balance sheet and recognize expense, similar to current accounting guidance, on the income statement. Additionally, the classification criteria and the accounting for sales-type and direct financing leases is modified for lessors. Under ASU 2016-2, all entities will classify leases to determine: (i) lease-related revenue and expense and (ii) for lessors, amount recorded on the balance sheet. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, with full retrospective application being prohibited. ASU 2016-2 is effective for interim and annual reporting periods beginning after December 15, 2018. These and other changes to accounting for leases under ASU 2016-2 are currently being evaluated by the Company for impacts to the Company's financial position, results of operations, cash flows and financial statement disclosures. In January 2016, the FASB issued ASU No. 2016-1, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-1 amends various areas of the accounting for financial instruments. Key provisions of the amendment currently being evaluated by the Company requires (i) equity investments to be measured at fair value (except those accounted for under the equity method), (ii) the simplification of equity investment impairment determination, (iii) certain changes to the fair value measurement of financial instruments measured at amortized cost, (iv) the separate presentation, in other comprehensive income, the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (given certain conditions), and (v) the evaluation for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the Company's other deferred tax assets. ASU 2016-1 is effective for interim and annual reporting periods beginning after December 15, 2017. These provisions and others of ASU 2016-1 are currently being assessed by the Company for impacts on the Company's financial position, results of operations, cash flows and financial statement disclosures. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments . ASU 2015-16 requires that an acquirer in a business combination recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendment requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The ASU also requires an entity to present separa

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Acquisition	Acquisition On October 2, 2012 ("Closing Date"), the Company completed the acquisition (the "Central Merger" or "Merger") of 100% of the outstanding common shares of KCPC Holdings, Inc., which was the ultimate parent of Central Parking Corporation (collectively, "Central"), for 6,161,332 shares of Company common stock and the assumption of approximately $217.7 million of Central's debt, net of cash acquired. Additionally, the Agreement and Plan of Merger dated February 28, 2012 with respect to the Central Merger ("Merger Agreement") provides that Central's former stockholders are entitled to receive cash consideration (the "Cash Consideration") in the amount equal to $27.0 million plus, if and to the extent the Net Debt Working Capital (as defined below) was less than $275.0 million (the "Lower Threshold") as of September 30, 2012, the amount by which the Net Debt Working Capital was below such amount (such sum, the "Cash Consideration Amount") to be paid three years after closing, to the extent the $27.0 million is not used to satisfy indemnity obligations pursuant to the Merger Agreement. Pursuant to the Merger Agreement, the Company is entitled to indemnification from Central's former stockholders (i) if and to the extent Central's combined net debt and the absolute value of Central's working capital (as determined in accordance with the Merger Agreement) (the "Net Debt Working Capital") exceeded $285.0 million (the "Upper Threshold") as of September 30, 2012 and (ii) for certain defined adverse consequences as set forth in the Merger Agreement (including with respect to Structural and Repair Costs). Pursuant to the Merger Agreement, Central's former stockholders are required to satisfy certain indemnity obligations, which are capped at the Cash Consideration Amount (the "Capped Items") only through a reduction of the Cash Consideration. For certain other indemnity obligations set forth in the Merger Agreement, which are not capped at the Cash Consideration Amount (the "Uncapped Items"), including the Net Debt Working Capital indemnity obligations described above, Central's former stockholders may satisfy any amount payable pursuant to such indemnity obligations as follows (provided that the Company reserves the right to reject the cash and stock alternatives available to the Company and choose to reduce the Cash Consideration): • Central's former stockholders can elect to pay such amount with cash; • Central's former stockholders can elect to pay such amount with the Company's common stock (valued at $23.64 per share, the market value as of the closing date of the Merger Agreement); or • Central's former stockholders can elect to reduce the $27.0 million cash consideration by such amount, subject to the condition that the cash consideration remains at least $17.0 million to cover Capped Items. Under the Merger Agreement, all post-closing claims and disputes, including as to indemnification matters, are ultimately subject to resolution through binding arbitration or, in the case of a dispute as to the calculation of Net Debt Working Capital, resolution by an independent public accounting firm. Should a dispute resolution process for indemnification matters result in determinations unfavorable to the Company, the resulting resolution may have a material impact on the Company’s consolidated financial statements. Since the Closing Date, the Company has periodically given Central’s former stockholders notice regarding indemnification matters, including with respect to the calculation of Net Debt Working Capital, and has made adjustments for known matters as they arose, although Central’s former stockholders have not agreed to the aggregate of such adjustments made by the Company. During such time, Central’s former stockholders have continually requested additional documentation supporting the Company’s indemnification claims, including with respect to the Company’s calculation of Net Debt Working Capital. Furthermore, following the Company's notices of indemnification matters, the representative of Central's former stockholders has indicated that they may make additional inquiries and raise issues with respect to the Company's indemnification claims (including, specifically, as to Structural and Repair Costs) and that they may assert various claims of their own relating to the Merger Agreement. The Company previously determined and submitted notification to Central’s former stockholders, that (i) the Net Debt Working Capital was $296.3 million as of September 30, 2012 and that, accordingly, the Net Debt Working Capital exceeded the Upper Threshold by $11.3 million ; and (ii) the Company had indemnity claims of $23.4 million for certain defined adverse consequences (including indemnity claims with respect to Structural and Repair Costs incurred through December 31, 2015) and as set forth in an October 1, 2015 notification letter to Central's former stockholders' that certain indemnification claims for Structural and Repair Costs yet to be incurred met the requirements of the indemnification provisions established in the Merger Agreement. These additional indemnification claims for Structural and Repair Costs are estimated to be $1.2 million (representing 80% of the $1.5 million of Structural and Repair Costs yet to be incurred by the Company). In early 2015, the Company and Central’s former stockholders engaged an independent public accounting firm for ultimate resolution, through binding arbitration, regarding its dispute as to the Company’s calculation of Net Debt Working Capital. On April 30, 2015, with respect to the Company's Net Debt Working Capital calculation, the representative of Central's former stockholders submitted specific objections to the Company's calculation, asserting that the Net Debt Working Capital as of September 30, 2012 was $270.8 million ( $4.2 million below the Lower Threshold) and on September 21, 2015 submitted a revised calculation, asserting that the Net Debt Working Capital as of September 30, 2012 was $278.0 million ( $3.0 million above the Lower Threshold) and therefore no amounts are due to the Company given calculated net Debt Working Capital is between the Lower Threshold and the Upper Threshold. On October 1, 2015, the Company provided notification to Central's former stockholders that the aggregate amount of the Company's (i) Net Debt Working Capital claim of $11.3 million as of September 30, 2012 and (ii) indemnity claims for certain defined adverse consequences as set forth in the Merger Agreement (including with respect to Structural and Repair Costs), exceeded the $27.0 million Cash Consideration and therefore the Company would not be making any Cash Consideration payment pursuant to Section 3.7 of the Merger Agreement. On October 20, 2015, Central's former stockholders provided notification that they deemed the Company's refusal to pay the $27.0 million Cash Consideration to be a violation of the terms of the Merger Agreement. On February 19, 2016, the Company and Central’s former stockholders received a non-appealable and binding decision from the independent public accounting firm indicating that Net Debt Working Capital as of September 30, 2012 was $291.6 million , or $6.6 million above the Upper Threshold. Furthermore, as part of the independent public accounting firm’s decision over the calculation of Net Debt Working Capital as of September 30, 2012, it was determined by the independent public accounting firm and the Company that $1.5 million of Net Debt Working Capital claims were more appropriately claimable as an adverse consequence indemnification claim, as defined in the Merger Agreement. As such and in conjunction with the independent public accounting firm’s decision on Net Debt Working Capital, the Company (i) reclassified $1.5 million of indemnification claims from the Net Debt Working Capital calculation to indemnification claims for certain adverse consequences; and (ii) recognized an expense of $1.6 million ( $0.9 million , net of tax) in General and administrative expenses for certain of the other amounts disallowed under the Net Debt Working Capital calculation as of and for the year ended December 31, 2015, respectively. The independent public accounting firm also determined that an additional $1.6 million of Net Debt Working Capital claims were disallowed; however, these Net Debt Working Capital amounts claimed by the Company were not previously recognized by the Company as a cost recovery given their contingent nature and since these claims were not previously recognized as an expense by the Company, the independent public accounting firm’s decision to disallow these claims had no impact to the Company's consolidated financial statements as of and for the year ended December 31, 2015. As a result of the independent public accounting firm’s decision on the calculation of Net Debt Working Capital, the Company will revise its indemnity claims for certain defined adverse consequences from $23.4 million to $24.9 million . As previously discussed in Note 1. Significant Accounting Policies and Practices , certain lease contracts acquired in the Central Merger include provisions allocating to the Company responsibility for all or a defined portion of the costs of certain structural and other repair costs required on the property, including improvement and repair costs arising as a result of ordinary wear and tear. The Company has reduced the Cash Consideration Amount by $6.6 million , representing the amount Net Debt Working Capital exceeded the Upper Threshold, and $18.8 million , representing the amount of indemnified claims for certain adverse consequences (including but not limited to Structural and Repair Costs) recognized by the Company as of December 31, 2015. While the Company has submitted $6.1 million of additional indemnity claims for certain adverse consequences (including but not limited to Structural and Repair Costs) to Central’s former stockholders, including claims as set forth in the October 1, 2015 letter, the Company has not recognized these indemnity claims as a receivable or offset to the Cash Consideration Amount with a corresponding gain or reduction of costs incurred by the Company, as these additional indemnified claims are contingent in nature or represent costs which the Company has not yet incurred but which met the requirements of the indemnification provisions established in the Merger Agreement. The Company has evaluated the nature of the costs and related indemnity claims and has concluded that it is probable that such indemnified claims will sustain any challenge from Central’s former stockholders and recoverability of these indemnified claims is reasonably assured. The Central Merger has been accounted for using the acquisition method of accounting (in accordance with the provisions of Accounting Standards Codification ("ASC") 805, Business Combinations), which requires, among other things, that most assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The purchase price has been allocated based on the estimated fair value of net assets acquired and liabilities assumed at the date of the date of acquistion. The Company finalized the purchase price allocation during the third quarter of 2013. The Company incurred certain acquisition and integration costs associated with the transaction that were expensed as incurred and are reflected in the Consolidated Statements of Income for the years ended December 31, 2015, 2014 and 2013. The Company recognized $6.2 million , $8.5 million and $10.9 million , respectively, of these costs in General and administrative expenses for the years ended December 31, 2015, 2014 and 2013, respectively, and an additional $1.0 million , $nil and $nil , respectively, of costs in Depreciation and amortization expense. Additionally and as noted above, the Company recognized $1.6 million of expense in General and administrative expenses for the year ended December 31, 2015 for certain Net Debt Working Capital claims deemed disallowable by the independent public accounting firm’s decision.

Net Income per Common Share

Net Income per Common Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Net Income per Common Share	Net Income per Common Share Basic net income per common share is computed by dividing net income attributable to SP Plus Corporation by the weighted average number of shares of common stock outstanding during the period. Diluted net income per common share is based upon the weighted average number of shares of common stock outstanding at period end, consisting of incremental shares assumed to be issued upon exercise of stock options and the incremental shares assumed to be issued under performance share and restricted stock unit arrangements, using the treasury-stock method. A reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding is as follows: Year Ended December 31, (millions, except share and per share data) 2015 2014 2013 Net income attributable to SP Plus Corporation $ 17.4 $ 23.1 $ 12.1 Basic weighted average common shares outstanding 22,189,140 22,009,800 21,902,870 Dilutive impact of share-based awards 322,619 397,543 346,714 Diluted weighted average common shares outstanding 22,511,759 22,407,343 22,249,584 Net income per common share Basic $ 0.78 $ 1.05 $ 0.55 Diluted $ 0.77 $ 1.03 $ 0.54 For the year ended December 31, 2015 and 2014, performance-based share units were excluded in the computation of weighted average diluted common share outstanding because the number of shares ultimately issuable is contingent on the Company's performance goals, which were not achieved as of the reporting date. There was no performance-based incentive program in place during 2013 . There are no additional securities that could dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share, other than those disclosed.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company measures stock-based compensation expense at the grant date, based on the estimated fair value of the award, and the expense is recognized over the requisite employee service period or performance period (generally the vesting period) for awards expected to vest (considering estimated forfeitures). The Company has an amended and restated long-term incentive plan (the "Plan") that was adopted in conjunction with its initial public offering in 2004. In February 2008, the Board of Directors approved an amendment to the Plan, subject to stockholder approval, that increased the maximum number of shares of common stock available for awards under the Plan from 2,000,000 to 2,175,000 and extended the Plan's termination date. Company stockholders approved this Plan amendment on April 22, 2008, and the Plan now terminates twenty years from the date of such approval, or April 22, 2028. On March 13, 2013, the Board approved an amendment to the Plan, subject to stockholder approval, that increased the number of shares of common stock available for awards under the Plan from 2,175,000 to 2,975,000 . Company stockholders approved this Plan amendment on April 24, 2013. Forfeited and expired options under the Plan become generally available for reissuance. At December 31, 2015 , 370,420 shares remained available for award under the Plan. Stock Options and Grants The Company uses the Black-Scholes option pricing model to estimate the fair value of each option grant as of the date of grant. The volatilities are based on the 90 day historical volatility of Company common stock as the grant date. The risk free interest rate is based on zero-coupon U.S. government issues with a remaining term equal to the expected life of the option. There were no options granted during the years ended December 31, 2015 , 2014 and 2013 . The Company recognized no stock-based compensation expense related to stock options for the years ended December 31, 2015 , 2014 and 2013 as all options previously granted are fully vested. On April 21, 2015, the Company authorized vested stock grants to certain directors totaling 32,357 shares. The total value of the grant was $0.7 million, which was fully expensed at the grant date, and is included in General and administrative expenses within the Consolidated Statements of Income. On April 22, 2014, the Company authorized vested stock grants to certain directors totaling 19,336 shares. The total value of the grant was $0.5 million, which was fully expensed at the grant date, and is included in General and administrative expenses within the Consolidated Statements of Income. On April 24, 2013, the Company authorized vested stock grants to certain directors totaling 21,949 shares. The total value of the grant, based on the fair value of the stock on the grant date, was $0.5 million, which was fully expensed at the grant date and is included in General and administrative expenses within the Consolidated Statements of Income. The Company recognized $0.7 million , $0.5 million , and $0.5 million of stock based compensation expense for the years ended December 31, 2015 , 2014 and 2013 , respectively, which are included in General and administrative expense within the Consolidated Statements of Income. As of December 31, 2015 , there was no unrecognized compensation costs related to unvested options. A summary of the status of the stock option plans as of December 31, 2015 , and changes during the years ended December 31, 2015 , 2014 and 2013 , are presented below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at December 31, 2012 7,101 $ 5.75 Granted — n/a Exercised — n/a Expired — n/a Outstanding at December 31, 2013 7,101 $ 5.75 Granted — n/a Exercised — n/a Expired — n/a Outstanding at December 31, 2014 7,101 $ 5.75 Granted — n/a Exercised (7,101 ) 5.75 Expired — n/a Vested and Exercisable at December 31, 2015 — $ — — $ — The total intrinsic value of options exercised during the year ended December 31, 2013 was $0.1 million. There were no nonvested options as of December 31, 2015 , 2014 and 2013 . Restricted Stock Units During the year ended December 31, 2015 , the Company authorized certain one-time grants of 3,963 restricted stock units to certain executives that vest three years from date of issuance. The restricted stock unit agreement is designed to reward performance over a three -year period. During the year ended December 31, 2014 , the Company authorized certain one-time grants of 31,099 restricted stock units to certain executives that vest five years from date of issuance. The restricted stock unit agreements are designed to reward performance over a five -year period. During the year ended December 31, 2013 , the Company authorized a one-time grant of 68,044 restricted stock units to executives that joined the Company in connection with the Central Merger. These restricted stock units vest on December 3, 2018. The restricted stock unit agreements are designed to reward performance over a five -year period. Additionally, the Company authorized a one-time grant of 4,247 restricted stock units to an executive which vest in June 2016. The fair value of restricted stock units is determined using the market value of Company common stock on the date of the grant, and compensation expense is recognized over the vesting period. The Company estimates forfeitures at the time of the grant and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting forfeitures and records stock-based compensation expense only for those awards that are expected to vest. A summary of the status of the restricted stock units as of December 31, 2015 , and changes during the year ended December 31, 2015 , 2014 and 2013 , are presented below: Shares Weighted Nonvested at December 31, 2012 723,425 $ 19.78 Issued 72,291 20.40 Vested (90,965 ) 21.84 Forfeited — n/a Nonvested at December 31, 2013 704,751 $ 20.00 Issued 31,099 22.20 Vested (145,421 ) 22.41 Forfeited (34,729 ) 23.88 Nonvested at December 31, 2014 555,700 $ 19.57 Issued 12,589 23.65 Vested (150,073 ) 20.77 Forfeited (16,500 ) 19.45 Nonvested at December 31, 2015 401,716 $ 19.25 The Company recognized $1.6 million, $2.4 million and $3.8 million of stock based compensation expense related to the restricted stock units for the year ended December 31, 2015 , 2014 and 2013 , respectively, which is included in General and administrative expense. For the years ended December 31, 2015 , 2014 and 2013 , unrecognized stock-based compensation costs, net of estimated forfeitures, were $2.7 million , $4.4 million and $7.3 million , respectively. The costs related to restricted stock units that are expected to be recognized over a weighted average period of approximately 3.8 years , 4.0 years and 4.0 years for 2015, 2014 and 2013, respectively. Performance Share Units In September 2014, the Board of Directors authorized a performance-based incentive program under the Company's Long-Term Incentive Plan ("Performance-Based Incentive Program"), whereby the Company will issue performance share units to certain executive management individuals that represent shares potentially issuable in the future. The objective of the performance-based incentive program is to link compensation to business performance, encourage ownership of Company stock, retain executive talent, and reward executive performance. The Performance-Based Incentive Program provides participating executives with the opportunity to earn vested common stock if certain performance targets for pre-tax free cash flow are achieved over the cumulative three year period and recipients satisfy service-based vesting requirements. The stock-based compensation expense associated with unvested performance-based incentives are recognized on a straight-line basis over the shorter of the vesting period or minimum service period and dependent upon the probable outcome of the number of shares that will ultimately be issued based on the achievement of pre-tax free cash flow over the cumulative three year period. During 2014, certain participating executives became vested in the Performance-Based Incentive Program shares based on retirement eligibility and as a result $0.2 million of stock-based compensation related to 9,687 shares were recognized in General and administrative expenses within the Consolidated Statement of Income, and which continue to be subject to achieving cumulative pre-tax free cash flow over the three -year period of 2014 through 2016. In April 2015, the Board of Directors authorized another performance-based incentive program under the Company's Long-Term Incentive Plan ("2015 Performance-Based Incentive Program"). The 2015 Performance-Based Incentive Program is similar to the 2014 Performance-Based Incentive Program, with the exception of the number of shares ultimately to be issued is based on the achievement of pre-tax free cash flow over the cumulative three -year period of 2015 through 2017. During 2015, certain participating executives became vested in Performance-Based Incentive Program shares based on retirement eligibility and as a result $0.1 million of stock-based compensation related to 6,915 shares were recognized in General and administrative expenses, and which continue to be subject to achieving cumulative pre-tax free cash flow over the respective three -year periods. A summary of the status of the performance share units as of December 31, 2015 , and changes during the year ended December 31, 2015 and 2014 are presented below: Shares Weighted Nonvested at December 31, 2013 — n/a Issued 89,117 18.96 Vested (9,687 ) 18.96 Forfeited — n/a Nonvested at December 31, 2014 79,430 18.96 Issued 125,392 21.64 Vested (6,915 ) 19.91 Forfeited (24,056 ) 20.60 Nonvested at December 31, 2015 173,851 $ 20.63 The Company recognized $1.3 million and $0.3 million of stock-based compensation expense for the years ended December 31, 2015 and 2014, respectively, and is included in General and administrative expenses within the Consolidated Statement of Income. During the year ended December 31, 2015 , 24,056 performance-based shares were forfeited under the Long-Term Incentive Program and became available for reissuance. During the year ended December 31, 2014 , no performance-based shares were forfeited. Future compensation expense for currently outstanding awards under the Performance-Based Incentive Program could reach a maximum of $5.4 million. Stock-based compensation for the Performance-Based Incentive Program is expected to be recognized over a weighted average period of 1.6 years . There was no such program in place during 2013.

Leasehold Improvements, Equipme

Leasehold Improvements, Equipment, Land and Construction in Progress, net	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Leasehold Improvements, Equipment, Land and Construction in Progress, net	Leasehold Improvements, Equipment, Land and Construction in Progress, net Leasehold improvements, equipment, and construction in progress and related accumulated depreciation and amortization is as follows: December 31 (millions) Ranges of Estimated Useful Life 2015 2014 Equipment 2 - 10 Years $ 34.5 $ 33.6 Software 3 - 10 Years 27.0 24.1 Vehicles 4 Years 8.7 8.6 Other 10 Years 0.4 0.3 Leasehold improvements Shorter of lease term or economic life up to 10 years 20.2 20.4 Construction in progress 3.6 2.1 94.4 89.1 Less accumulated depreciation and amortization (59.8 ) (47.6 ) 34.6 41.5 Land — 1.3 Leasehold improvements, equipment, land and construction in progress, net $ 34.6 $ 42.8 Asset additions are recorded at cost, which includes interest on significant projects. Depreciation is provided in amounts sufficient to relate the cost of depreciable assets to operations over their estimated useful lives or over the terms of the respective leases, whichever is shorter, and depreciated principally on the straight-line basis. The costs and accumulated depreciation of assets sold or disposed of are removed from the accounts and the resulting gain or loss is reflected in earnings. Plant and equipment are reviewed for impairment when conditions indicate an impairment or future impairment; the assets are either written down or the useful life is adjusted to the remaining period of estimated useful life. Depreciation expense was $15.9 million, $12.0 million and $10.4 million in 2015 , 2014 and 2013 , respectively. During the year ended December 31, 2013, the Company sold its equity interest in land for $2.3 million and recognized a gain on sale of $1.2 million.

Cost of Contracts, net

Cost of Contracts, net	12 Months Ended
	Dec. 31, 2015
Other Deferred Costs, Net [Abstract]
Cost of Contracts, net	Cost of Contracts, net Cost of contracts, net is comprised of the following: December 31, (millions) 2015 2014 Cost of contracts $ 31.3 $ 28.3 Accumulated amortization (19.4 ) (17.8 ) Cost of contracts, net $ 11.9 $ 10.5 The expected future amortization of cost of contracts is as follows: (millions) Cost of 2016 $ 3.2 2017 3.0 2018 2.5 2019 1.6 2020 0.6 2021 and Thereafter 1.0 Total $ 11.9 Amortization expense related to cost of contracts was $3.1 million, $3.2 million and $2.8 million for the years ended December 31, 2015 , 2014 and 2013 respectively. The weighted average remaining life was 9.0 years, 9.5 years and 9.6 years as of December 31, 2015 , 2014 and 2013 , respectively.

Other Intangible Assets, Net

Other Intangible Assets, Net	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Other Intangible Assets, Net	Other Intangible Assets, Net The following presents a summary of other intangible assets: December 31, 2015 2014 (millions) Weighted Acquired Accumulated Acquired Acquired Accumulated Acquired Covenant not to compete 3.0 $ 0.9 $ (0.9 ) $ — $ 0.9 $ (0.9 ) $ — Trade names and trademarks 1.1 9.8 (7.8 ) 2.0 9.8 (5.5 ) 4.3 Proprietary know how 1.3 34.7 (25.0 ) 9.7 34.7 (17.4 ) 17.3 Management contract rights 12.8 81.0 (16.8 ) 64.2 81.0 (11.6 ) 69.4 Acquired intangible assets, net (2) 11.1 $ 126.4 $ (50.5 ) $ 75.9 $ 126.4 $ (35.4 ) $ 91.0 (1) Excludes the original cost and accumulated amortization on fully amortized intangible assets. (2) Intangible assets have estimated remaining lives between one and 16 years. Amortization expense related to intangible assets included in depreciation and amortization expense was $15.1 million, $15.2 million and $16.8 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. The expected future amortization of intangible assets as of December 31, 2015 is as follows: (millions) Intangible asset 2016 $ 14.6 2017 7.2 2018 5.3 2019 5.2 2020 5.2 2021 and Thereafter 38.4 Total $ 75.9

Favorable and Unfavorable Acqui

Favorable and Unfavorable Acquired Lease Contracts, net	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Favorable and Unfavorable Acquired Lease Contracts, net	Favorable and Unfavorable Acquired Lease Contracts, net Favorable and unfavorable lease contracts represent the acquired fair value of lease contracts in connection with the Central Merger. Favorable and unfavorable acquired lease contracts are being amortized over the contract term, including anticipated renewals and terminations. The following presents a summary of favorable and unfavorable lease contracts: Favorable (Unfavorable) December 31, December 31, (millions) 2015 2014 2015 2014 Acquired fair value of lease contracts $ 74.0 $ 77.0 $ (88.2 ) $ (90.1 ) Accumulated (amortization) accretion (35.9 ) (28.7 ) 37.9 28.7 Total acquired fair value of lease contracts, net $ 38.1 $ 48.3 $ (50.3 ) $ (61.4 ) Amortization for lease contracts, net of favorable lease contracts, was $0.9 million for the year ended December 31, 2015 and is recognized as an increase to Cost of parking services - Lease contract. Amortization, net of unfavorable lease contracts, was $1.0 million and $4.3 million for the years ended December 31, 2014 and 2013 , respectively, and is recognized as a reduction to Cost of parking services-Lease contract within the Consolidated Statements of Income. For the year ended December 31, 2015 , the weighted average remaining life for favorable and unfavorable acquired lease contracts was 11.1 years and 10.1 years , respectively. For the year ended December 31, 2014 , the weighted average remaining life for favorable and unfavorable acquired lease contracts was 10.8 years and 9.8 years , respectively. For the years ended December 31, 2013 , the weighted average remaining life for favorable and unfavorable acquired lease contracts was 10.1 years and 8.9 years , respectively. The expected future amortization (accretion) of lease contract rights is as follows: (millions) Favorable (Unfavorable) Favorable / 2016 $ 8.2 $ (10.1 ) $ (1.9 ) 2017 6.4 (9.0 ) (2.6 ) 2018 4.0 (7.3 ) (3.3 ) 2019 3.6 (4.8 ) (1.2 ) 2020 3.1 (3.7 ) (0.6 ) 2021 and Thereafter 12.8 (15.4 ) (2.6 ) Total $ 38.1 $ (50.3 ) $ (12.2 )

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The amounts for goodwill and changes to carrying value by reportable segment are as follows: (millions) Region Region Region Region Region Total Balance as of December 31, 2013 $ 163.8 $ 143.8 $ 37.0 $ 62.6 $ 32.2 $ 439.4 Goodwill acquired — — — 0.2 — 0.2 Foreign currency translation (0.5 ) — — — (0.5 ) Disposals (1) (2.1 ) (2.3 ) (0.6 ) (0.1 ) (1.1 ) (6.2 ) Balance as of December 31, 2014 $ 161.2 $ 141.5 $ 36.4 $ 62.7 $ 31.1 $ 432.9 Foreign currency translation (0.7 ) — — — — (0.7 ) Disposals (2) — (0.9 ) — — — (0.9 ) Balance as of December 31, 2015 $ 160.5 $ 140.6 $ 36.4 $ 62.7 $ 31.1 $ 431.3 (1) In October 2014, the Company contributed all of the assets and liabilities of its proprietary Click and Park parking prepayment business in exchange for a 30 percent interest in the newly formed legal entity called Parkmobile, LLC. The contribution of the Click and Park business to the joint venture resulted in a loss of control of the subsidiary and therefore it was deconsolidated from the Company's financial statements. As a result of the deconsolidation, the Company was required to allocate $6.2 million of goodwill to the net carrying amount of the subsidiary's net assets contributed to the Parkmobile joint venture. The pro-rata allocation on the disposal of goodwill at the operating segment level was based on a relative fair value approach. (2) In August 2015, certain assets, which met the definition of a business, were sold to a third-party in an arms-length transaction (see also Note 1. Significant Accounting Policies and Practices and Note 10. Fair Value for further detail on the sale of the business). The sale resulted in the disposal of specifically identifiable goodwill associated with the business of $0.9 million from Region Two. The Company tests goodwill at least annually for impairment (the Company has elected to annually test for potential impairment of goodwill on the first day of the fourth quarter) and tests more frequently if indicators are present or changes in circumstances suggest that impairment may exist. The indicators include, among others, declines in sales, earning or cash flows or the development of a material adverse change in business climate. The Company assesses goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, referred to as a reporting unit. See Note 1. Significant Accounting Policies and Practices for additional detail on the Company's policy for assessing goodwill for impairment. Due to a change in the Company’s segment reporting effective January 1, 2015, the goodwill allocated to previous reporting units have been reallocated to new reporting units based on the relative fair value of the new reporting units. See also Note 19. Domestic and Foreign Operations for further disclosure on the Company’s change in reporting segments effective January 1, 2015. As a result of the change in internal reporting segment information, the Company completed a quantitative test (Step One) of goodwill impairment as of January 1, 2015 and concluded that the estimated fair values of each of the Company’s reporting units exceeded its carrying amount of net assets assigned to that reporting unit and therefore no further testing was required (Step Two). In conducting the January 1, 2015 goodwill impairment quantitative test (Step One), the Company analyzed actual and projected growth trends of the reporting units, gross margin, operating expenses and Earnings Before Interest, Taxes, Depreciation and Amortization (“EBITDA”) (which also includes forecasted five -year income statement and working capital projection, a market-based weighted average cost of capital and terminal values after five years). The Company also assesses critical areas that may impact its business including economic conditions, market related exposures, competition, changes in service offerings and changes in key personnel. As part of the January 1, 2015 goodwill assessment, the Company engaged a third-party to evaluate its reporting units’ fair values. No impairment was recorded as a result of the goodwill impairment test performed. The Company completed its annual goodwill impairment test as of October 1, 2015, using a quantitative test (Step One), and concluded that the estimated fair values of each of the Company's reporting units exceeded its carrying amount of net assets assigned to that reporting unit and therefore no further testing was required (Step Two). As part of the October 1, 2015 goodwill assessment, the Company engaged a third-party to evaluate its reporting units' fair values. No impairment was recorded as a result of the goodwill impairment test performed. The reporting units are reported as Region One (North reporting unit), Region Two (South reporting unit), Region Three (New York Metropolitan tri-state area of New York, New Jersey and Connecticut reporting unit), Region Four (Airport transportation operations nationwide reporting unit) and Region Five (USA Parking reporting unit and event planning and transportation services reporting unit). For purposes of reportable segments, goodwill in Region Five is attributable to USA Parking and event planning and transportation services reporting units.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement Fair Value Measurements-Recurring Basis In determining fair value, the Company uses various valuation approaches within the fair value measurement framework. Fair value measurements are determined based on the assumptions that market participants would use in pricing an asset or liability. Applicable accounting literature establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. The fair value hierarchy is based on observable or unobservable inputs to valuation techniques that are used to measure fair value. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity's pricing based upon its own market assumptions. Applicable accounting literature defines levels within the hierarchy based on the reliability of inputs as follows: • Level 1: Inputs are quoted prices in active markets for identical assets or liabilities. • Level 2: Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs other than quoted prices that are observable and market-corroborated inputs, which are derived principally from or corroborated by observable market data. • Level 3: Inputs that are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable. The following table sets forth the Company's financial assets and liabilities measured at fair value on a recurring basis and the basis of measurement at December 31, 2015 and 2014 : Fair Value at Fair Value at (millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets Prepaid expenses and other Contingent consideration receivable $ — $ — $ 0.5 $ — $ — $ — Interest rate swap — 0.2 — — 0.6 — Total $ — $ 0.2 $ 0.5 $ — $ 0.6 $ — Liabilities Accrued expenses Contingent consideration obligation $ — $ — $ — $ — $ — $ 0.1 Other long term liabilities Contingent consideration obligation — — — — — 0.2 Total $ — $ — — $ — — $ 0.3 Interest Rate Swap The Company seeks to minimize risks from interest rate fluctuations through the use of interest rate swap contracts and hedge only exposures in the ordinary course of business. Interest rate swaps are used to manage interest rate risk associated with our floating rate debt. The Company accounts for its derivative instruments at fair value provided it meets certain documentary and analytical requirements to qualify for hedge accounting treatment. Hedge accounting creates the potential for a Consolidated Statements of Income match between the changes in fair values of derivatives and the changes in cost of the associated underlying transactions, in this case interest expense. Derivatives held by us are designated as hedges of specific exposures at inception, with an expectation that changes in the fair value will essentially offset the change in the underlying exposure. Discontinuance of hedge accounting is required whenever it is subsequently determined that an underlying transaction is not going to occur, with any gains or losses recognized in the Consolidated Statements of Income at such time, with any subsequent changes in fair value recognized currently in earnings. Fair values of derivatives are determined based on quoted prices for similar contracts. The effective portion of the change in fair value of the interest rate swap is reported in accumulated other comprehensive income, a component of stockholders' equity, and is being recognized as an adjustment to interest expense or other (expense) income, respectively, over the same period the related expenses are recognized in earnings. Ineffectiveness would occur when changes in the market value of the hedged transactions are not completely offset by changes in the market value of the derivative and those related gains and losses on derivatives representing hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized currently in earnings when incurred. No ineffectiveness was recognized during 2015 , 2014 or 2013 . Contingent Consideration Receivable During the third quarter of 2015, certain assets, which met the definition of a business, were sold to a third-party in an arms-length transaction (see also Note 1. Significant Accounting Policies and Practices for further detail on the sale of the business). Under the sales agreement, 40% of the sale proceeds from the buyer is contingent in nature and scheduled to be received by the Company in February 2017, or eighteen months from the date of the transaction. The contingent consideration amount expected to be received by the Company is based on the financial and operational performance of the business sold. The significant inputs used to derive the Level 3 fair value contingent consideration receivable is the probability of reaching certain revenue growth of the business and retention of current customers over the eighteen month period. The fair value of the contingent consideration receivable for the year ended December 31, 2015 was $0.5 million . Contingent Consideration Obligation The significant inputs used to derive the fair value of the contingent consideration obligation include financial forecasts of future operating results, the probability of reaching the forecast and the associated discount rate. The contingent acquisition obligation remaining for the year ended December 31, 2015 was not significant. The following table provides a reconciliation of the beginning and ending balances for the contingent consideration obligation measured at fair value using significant unobservable inputs (Level 3): (millions) Due to Seller Balance at December 31, 2012 $ (3.3 ) Increase related to new acquisitions — Payment of contingent consideration 0.9 Change in fair value 0.9 Balance at December 31, 2013 (1.5 ) Increase related to new acquisitions — Payment of contingent consideration 1.8 Change in fair value (0.5 ) Balance at December 31, 2014 (0.3 ) Increase related to new acquisitions — Payment of contingent consideration 0.1 Change in fair value 0.2 Balance at December 31, 2015 $ — Note: Amounts may not foot due to rounding. For the year ended December 31, 2015 , the Company recognized a benefit of $0.2 million in General and administrative expenses within the Consolidated Statement of Income due to the change in fair value measurements using a level three valuation technique. For the years ended December 31, 2014 and 2013 , the Company recognized an expense and benefit, respectively, of $0.5 million and $0.9 million in General and administrative expenses due to the change in fair value measurements using a level three valuation technique. These adjustments were the result of using revised forecasts to operating results, updates to the probability of achieving the revised forecasts and updated fair value measurements that revised the Company's contingent consideration obligations related to the purchase of these businesses. Nonrecurring Fair Value Measurements Certain assets are measured at fair value on a nonrecurring basis; that is, the assets are measured at fair value on an ongoing basis but are subject to fair value adjustments only in certain circumstances (for example, when there is evidence of impairment). Non-financial assets such as goodwill, intangible assets, and leasehold improvements, equipment land and construction in progress are subsequently measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment is recognized. The Company assesses the impairment of intangible assets annually or whenever events or changes in circumstances indicate that the carrying amount of an intangible asset may not be recoverable. The fair value of its goodwill and intangible assets is not estimated if there is no change in events or circumstances that indicate the carrying amount of an intangible asset may not be recoverable. The Company has not recorded impairment charges related to its business acquisitions. The purchase price of business acquisitions is primarily allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values on the acquisition dates, with the excess recorded as goodwill. The Company utilizes Level 3 inputs in the determination of the initial fair value. Financial Instruments not Measured at Fair Value The following table presents the carrying amounts and estimated fair values of financial instruments not measured at fair value in the Consolidated Balance Sheet at December 31, 2015 and 2014 : 2015 2014 (millions) Carrying Fair Carrying Fair Cash and cash equivalents $ 18.7 $ 18.7 $ 18.2 $ 18.2 Long-term borrowings Senior credit facility, net of original discount on borrowings and deferred financing costs 223.1 223.1 248.4 248.4 Other obligations $ 2.0 $ 2.0 $ 2.4 $ 2.4 The carrying value of cash and cash equivalents approximates their fair value due to the short-term nature of these financial instruments and would be classified as a Level 1. The fair value of the Senior Credit Facility and Other obligations were estimated to not be materially different from the carrying amount and are generally measured using a discounted cash flow analysis based on current market interest rates for similar types of financial instruments and would be classified as a Level 2.

Borrowing Arrangements

Borrowing Arrangements	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowing Arrangements	Borrowing Arrangements Long-term borrowings, in order of preference, consisted of the following: Amount Outstanding December 31, (millions) Maturity Date 2015 2014 Senior credit facility, net of original discount on borrowings and deferred financing costs (1) / (2) $ 223.1 $ 248.4 Other borrowings Various 2.0 2.4 Total obligations under credit facility and other borrowings 225.1 250.8 Less: Current portion of obligations under credit facility and other borrowings 15.2 14.5 Total long-term obligations under credit facility and other borrowings $ 209.9 $ 236.3 (1) Credit Agreement was due to mature October 2, 2017 (2) Restated Credit Agreement matures on February 20, 2020. Aggregate minimum principal maturities of long-term borrowings for the fiscal years following December 31, 2015 , are as follows: (millions) 2016 $ 16.5 2017 20.4 2018 20.1 2019 20.0 2020 152.3 Thereafter — Total debt 229.3 Less: Current portion, including debt discount 15.2 Less: Original discount on borrowings 1.8 Less: Deferred financing costs 2.4 Total long-term portion, obligations under credit facility and other borrowings $ 209.9 Senior Credit Facility On October 2, 2012, the Company entered into a credit agreement ("Credit Agreement") with Bank of America, N.A. ("Bank of America"), as administrative agent, Wells Fargo Bank, N.A. ("Wells Fargo Bank") and JPMorgan Chase Bank, as co-syndication agents, U.S. Bank National Association, First Hawaiian Bank and General Electric Capital Corporation, as co-documentation agents, Merrill Lynch, Pierce, Fenner & Smith Inc., Wells Fargo Securities, LLC and J.P. Morgan Securities LLC, as joint lead arrangers and joint book managers, and the lenders party thereto. Pursuant to the terms, and subject to the conditions, of the Credit Agreement, the Lenders made available to the Company a secured senior credit facility (the "Senior Credit Facility") that permitted aggregate borrowings of $450.0 million consisting of (i) a revolving credit facility of up to $200.0 million at any time outstanding, which includes a letter of credit facility that is limited to $100.0 million at any time outstanding, and (ii) a term loan facility of $250.0 million. The Senior Credit Facility was due to mature on October 2, 2017. Amended and Restated Credit Facility On February 20, 2015 (“Restatement Date”), the Company entered into an Amended and Restated Credit Agreement (the “Restated Credit Agreement”) with Bank of America, N.A. (“Bank of America”), as administrative agent, an issuing lender and swing-line lender; Wells Fargo Bank, N.A., as an issuing lender and syndication agent; U.S. Bank National Association, First Hawaiian Bank and BMO Harris Bank N.A., as co-documentation agents; Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, as joint lead arrangers and joint book managers; and the lenders party thereto (the “Lenders”). The Restated Credit Agreement reflects modifications to, and an extension of, the Senior Credit Agreement. Pursuant to the terms, and subject to the conditions, of the Restated Credit Agreement, the Lenders have made available to the Company a senior secured credit facility (the “Restated Credit Facility”) that permits aggregate borrowings of $400.0 million consisting of (i) a revolving credit facility of up to $200.0 million at any time outstanding, which includes a $100.0 million sublimit for letters of credit and a $20.0 million sublimit for swing-line loans, and (ii) a term loan facility of $200.0 million (reduced from $250.0 million under the Senior Credit Facility). The Company may request increases of the revolving credit facility in an aggregate additional principal amount of $100.0 million . The Restated Credit Facility matures on February 20, 2020. The entire amount of the term loan portion of the Restated Credit Facility had been drawn by the Company as of the Amended and Restatement Date (including approximately $10.4 million drawn on such date) and is subject to scheduled quarterly amortization of principal as follows: (i) $15.0 million in the first year, (ii) $15.0 million in the second year, (iii) $20.0 million in the third year, (iv) $20.0 million in the fourth year, (v) $20.0 million in the fifth year and (vi) $110.0 million in the sixth year. The Company also had outstanding borrowings of $147.3 million (including $53.4 million in letters of credit) under the revolving credit facility as of the Restatement Date. Borrowings under the Restated Credit Facility bear interest, at the Company’s option, (i) at a rate per annum based on the Company’s consolidated total debt to EBITDA ratio for the 12 -month period ending as of the last day of the immediately preceding fiscal quarter, determined in accordance with the pricing levels set forth in the Restated Credit Agreement (the “ Applicable Margin”), plus LIBOR or (ii) the Applicable Margin plus the highest of (x) the federal funds rate plus 0.5% , (y) the Bank of America prime rate and (z) a daily rate equal to LIBOR plus 1.0% (the highest of (x), (y) and (z), the “Base Rate”), except that all swing-line loans will bear interest at the Base Rate plus the Applicable Margin. Under the terms of the Restated Credit Agreement, the Company is required to maintain a maximum consolidated total debt to EBITDA ratio of not greater than 4.0 to 1.0 as of the end of any fiscal quarter ending during the period from the Amended and Restatement Date through September 30, 2015, (ii) 3.75 to 1.0 as of the end of any fiscal quarter ending during the period from October 1, 2015 through September 30, 2016, and (iii) 3.5 to 1.0 as of the end of any fiscal quarter ending thereafter. In addition, the Company is required to maintain a minimum consolidated fixed charge coverage ratio of not less than 1.25 :1.0. Events of default under the Restated Credit Agreement include failure to pay principal or interest when due, failure to comply with the financial and operational covenants, the occurrence of any cross default event, non-compliance with the other loan documents, the occurrence of a change of control event, and bankruptcy and other insolvency events. If an event of default occurs and is continuing, the Lenders holding a majority of the commitments and outstanding term loan under the Restated Credit Agreement have the right, among others, to (i) terminate the commitments under the Restated Credit Agreement, (ii) accelerate and require the Company to repay all the outstanding amounts owed under the Restated Credit Agreement and (iii) require the Company to cash collateralize any outstanding letters of credit. Each wholly owned domestic subsidiary of the Company (subject to certain exceptions set forth in the Restated Credit Agreement) has guaranteed all existing and future indebtedness and liabilities of the other guarantors and the Company arising under the Restated Credit Agreement. The Company’s obligations under the Restated Credit Agreement and such domestic subsidiaries’ guaranty obligations are secured by substantially all of their respective assets. The Company was in compliance with all of its covenants as of December 31, 2015 . The weighted average interest rate on our Senior Credit Facility and Restated Credit Facility was 2.6% and 3.2% for the years ended December 31, 2015 and 2014, respectively. The rate includes all outstanding LIBOR contracts, cash flow hedge effectiveness effect and letters of credit. The weighted average interest rate on outstanding borrowings, not including letters of credit, was 2.7% and 3.2% , respectively, at December 31, 2015 and December 31, 2014 . At December 31, 2015 , the Company had $105.3 million of borrowing availability under the Restated Credit Agreement, of which the Company could have borrowed $82.7 million on December 31, 2015 and remained in compliance with the above described covenants as of such date. The additional borrowing availability under the Restated Credit Agreement is limited only as of the Company's fiscal quarter end by the covenant restrictions described above. At December 31, 2015 , the Company had $52.4 million of letters of credit outstanding under the Restated Credit Agreement with aggregate borrowings against the Restated Credit Agreement of $227.3 million (excluding debt discount of $1.8 million and deferred financing cost of $2.4 million ). In connection with and effective upon the execution and delivery of the Restated Credit Agreement on February 20, 2015, the Company recorded losses on extinguishment of debt, relating to debt discount and debt issuance costs, of $0.6 million. See Note 1. Significant Accounting Policies and Practices for additional information regarding the treatment of debt issuance costs under ASU 2015-3, which requires such costs to be a direct deduction from the carrying amount of the related debt liability. Subordinated Convertible Debentures The Company acquired Subordinated Convertible Debentures ("Convertible Debentures") as a result of the acquisition of Central. The subordinated debenture holders have the right to redeem the Convertible Debentures for $19.18 per share upon their stated maturity (April 1, 2028) or upon acceleration or earlier repayment of the Convertible Debentures. There were $0.1 million and no significant redemptions during the years ended December 31, 2015 and 2014 , respectively. The approximate redemption value of the Convertible Debentures outstanding at December 31, 2015 and December 31, 2014 is $1.1 million and $1.2 million, respectively.

Leases and Contingencies

Leases and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Leases and Contingencies	Leases and Contingencies The Company operates parking facilities under operating leases expiring on various dates. Certain of the leases contain options to renew at the Company's discretion. Total future annual rent expense is not determinable as a portion of such future rent is contingent based on revenues of the parking facilities. At December 31, 2015 , the Company's minimum rental commitments, excluding contingent rent provisions and sublease income under all non-cancellable operating leases, are as follows: (millions) 2016 $ 222.0 2017 190.6 2018 158.7 2019 137.2 2020 70.4 2021 and thereafter 206.2 Total $ 985.1 (1) $18.6 is included in 2016 minimum commitments for leases that expire in less than one year. Rent expense, including contingent rents, was $400.3 million, $330.8 million and $326.8 million in 2015 , 2014 and 2013 , respectively. Contingent rent expense was $186.2 , $139.7 million and $133.9 million in 2015 , 2014 and 2013 , respectively. Contingent rent expense consists primarily of percentage rent payments, which will cease at various times as certain leases expire. Future sublease income under all non-cancellable operating leases was $29.8 million as of December 31, 2015 . The Company accrued no contingent payment obligations outstanding under the previous business combination accounting pronouncement for the year ended December 31, 2015 . The Company has recorded a contingency obligation for acquisitions subsequent to the adoption of the most recent guidance on business combinations, in the amount of $0.1 million and $0.3 million, as of December 31, 2015 and 2014 , respectively. The Company has contractual provisions under certain lease contracts to complete structural or other improvements to leased properties and incurs repair costs, including improvements and repairs arising as a result of ordinary wear and tear. The Company evaluates the nature of those costs when incurred and either capitalizes the costs as leasehold improvements, as applicable, or recognizes the costs as repair expenses within Cost of Parking Services-Leases within the Consolidated Statements of Income.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For financial reporting purposes, earnings before income taxes includes the following components: Year Ended December 31, (millions) 2015 2014 2013 United States $ 21.7 $ 23.5 $ 21.4 Foreign 3.4 2.4 2.2 Total $ 25.1 $ 25.9 $ 23.6 The components of income tax expense (benefit) are as follows: Year Ended December 31, (millions) 2015 2014 2013 Current provision U.S. federal $ 11.5 $ 9.5 $ 3.2 Foreign 1.2 0.8 0.7 State 1.8 1.6 2.2 Total current 14.5 11.9 6.1 Deferred provision U.S. federal (4.9 ) (1.5 ) 2.3 Foreign 0.1 0.1 (0.1 ) State (4.9 ) (10.7 ) 0.5 Total deferred (9.7 ) (12.1 ) 2.7 Income tax expense (benefit) $ 4.8 $ (0.2 ) $ 8.8 Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amount used for income tax purposes. Significant components of the Company's deferred tax assets and liabilities are as follows: December 31, (millions) 2015 2014 Deferred tax assets Net operating loss carry forwards $ 20.6 $ 22.0 Accrued expenses 34.1 34.3 Accrued compensation 12.1 12.0 Book over tax cost unfavorable acquired lease contracts 20.6 25.2 Other 0.7 0.4 Total gross deferred tax assets 88.1 93.9 Less: valuation allowance (6.8 ) (12.3 ) Total deferred tax assets 81.3 81.6 Deferred tax liabilities Prepaid expenses (0.4 ) (0.6 ) Undistributed foreign earnings (1.0 ) (0.8 ) Tax over book depreciation and amortization (11.0 ) (16.7 ) Tax over book goodwill amortization (28.7 ) (28.7 ) Tax over book cost favorable acquired lease contracts (15.6 ) (19.8 ) Equity investments in unconsolidated entities (8.8 ) (9.2 ) Other (0.1 ) (0.7 ) Total deferred tax liabilities (65.6 ) (76.5 ) Net deferred tax asset $ 15.7 $ 5.1 Amounts recognized on the balance sheet consist of: December 31, (millions) 2015 2014 Deferred tax asset, current $ 12.3 $ 10.9 Other assets, net / Deferred tax (liability) 3.4 (5.8 ) Net deferred tax asset $ 15.7 $ 5.1 The accounting guidance for accounting for income taxes requires that the Company assess the realisability of deferred tax assets at each reporting period. These assessments generally consider several factors including the reversal of existing temporary differences, projected future taxable income, and potential tax planning strategies. The Company has valuation allowances totaling $6.8 million and $12.3 million at December 31, 2015 and 2014 , respectively, primarily related to our state Net Operating Loss carryforwards ("NOLs") and state tax credit that the Company believes are not likely to be realized based on upon its estimates of future taxable income, limitations on the uses of its state NOLs, and the carryforward life over which the state tax benefit is realized. The Company recognized a $5.5 million benefit for the reversal of a valuation allowance for deferred tax assets established for the historical net operating losses. The valuation allowance was reversed primarily due to changes in the New York City tax laws enacted April 1, 2015 and an entity restructuring undertaken in the fourth quarter of 2015, which resulted in the Company determining that the future benefit of the net operating loss carryforwards were more likely than not to be realized. The Company has $19.7 million of tax-effected state net operating loss carryforwards as of December 31, 2015 , which will expire in years 2016 through 2035. As noted above, the utilization of the state net operating loss carryforwards of the Company are limited due to the ownership change in June 2004 and are also limited due to the Central Merger. Since 2005, the Company has treated its investment in its Canadian subsidiary as non-permanent in duration and provided taxes on the undistributed Canadian earnings. As of December 31, 2015 , the Company treats approximately $2.4 million of Canadian earnings as permanently reinvested to meet the Canadian subsidiary's working capital requirements. The amount of tax that may be payable on the distribution of such earnings to the United States is approximately $1.0 million. Generally, such amounts will become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. The Company has provided taxes for the remaining undistributed earnings of its Canadian subsidiary in excess of the permanently reinvested amount. The Company is treating its cumulative earnings of $5.6 million in its Puerto Rico subsidiary as permanent in duration to satisfy current working capital requirements. The amount of tax that may be payable on a distribution of such earnings to the United States is $2.5 million. A reconciliation of the Company's reported income tax provision (benefit) to the amount computed by multiplying book income before income taxes by the statutory United States federal income tax rate is as follows: Year Ended December 31, (millions) 2015 2014 2013 Tax at statutory rate $ 8.8 $ 9.1 $ 8.3 Permanent differences 1.4 1.0 0.8 State taxes, net of federal benefit 0.3 0.8 1.4 Effect of foreign tax rates (0.1 ) — — Minority interest (1.0 ) (1.1 ) (0.9 ) Equity investments in unconsolidated entities — 2.4 — Current year adjustment to deferred taxes 1.5 (1.3 ) 4.0 Recognition of tax credits (1.2 ) (1.5 ) (1.7 ) Other 0.6 (0.5 ) 0.9 10.3 8.9 12.8 Change in valuation allowance (5.5 ) (9.1 ) (4.0 ) Income tax (benefit) expense $ 4.8 $ (0.2 ) $ 8.8 Taxes paid, which are for United States federal income tax, certain state income taxes, and foreign income taxes were $18.1 million, $1.3 million, and $1.3 million in 2015 , 2014 and 2013 , respectively. As of December 31, 2015, 2014 and 2013 the Company had not identified any uncertain tax positions that would have a material impact on the Company's financial position. The Company recognizes potential interest and penalties related to uncertain tax positions, if any, in income tax expense. The tax years that remain subject to examination for the Company's major tax jurisdictions as of December 31, 2015 are shown below: 2011 - 2015 United States—federal income tax 2007 - 2015 United States—state and local income tax 2012 - 2015 Foreign—Canada and Puerto Rico

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	Benefit Plans Deferred Compensation Arrangements The Company offers deferred compensation arrangements for certain key executives. Subject to their continued employment by the Company, certain employees are offered supplemental pension arrangements in which the employees will receive a defined monthly benefit upon attaining age 65 . At December 31, 2015 and 2014 , the Company has accrued $3.7 million and $5.0 million, respectively, representing the present value of the future benefit payments. Expenses related to these plans amounted to $0.2 million, $0.4 million and $0.1 million in 2015 , 2014 and 2013 , respectively. The Company also has agreements with certain former key executives that provide for aggregate annual payments for periods ranging from 10 years to life, beginning when the executive retires or upon death or disability. Under certain conditions, the amount of deferred benefits can be reduced. Compensation costs for the years ended December 31, 2015 , 2014 and 2013 were $0.1 million, $1.0 million and $0.6 million , respectively. The Company had recorded a liability of $3.8 million and $4.2 million associated with these agreements as of December 31, 2015 and 2014 , respectively. Life insurance contracts with a face value of approximately $6.9 million and $10.8 million as of December 31, 2015 and 2014 have been purchased to fund, as necessary, the benefits under the Company's deferred compensation agreements. The cash surrender value of the life insurance contracts is approximately $3.9 million and $3.9 million as of December 31, 2015 and 2014 , respectively, and classified as non-current assets and included in Other assets, net within the Consolidated Balance Sheet. The plan is a non-qualified plan and is not subject to ERISA funding requirements. Defined Contribution Plans The Company sponsored two savings and retirement plans whereby the participants may elect to contribute a portion of their compensation to the plans. The two plans merged effective January 1, 2014 into a single plan. The plan is a qualified defined contribution plan 401(k). The Company contributes an amount in cash or other property as a Company match equal to 50% of the first 6% of contributions as they occur. Expenses related to the Company's 401(k) match amounted to $2.1 million, $1.8 million, and $1.8 million in 2015 , 2014 and 2013 , respectively. The Company also offers a non-qualified deferred compensation plan to those employees whose participation in its 401(k) plan is limited by statute or regulation. This plan allows certain employees to defer a portion of their compensation, limited to a maximum of $0.1 million per year, to be paid to the participants upon separation of employment or distribution date selected by employee. To support the non-qualified deferred compensation plan, the Company has elected to purchase Company Owned Life Insurance ("COLI") policies on certain plan participants. The cash surrender value of the COLI policies is designed to provide a source for funding the non-qualified deferred compensation liability. As of December 31, 2015 and 2014 , the cash surrender value of the COLI policies is $10.9 million and $9.9 million, respectively and classified as non-current assets in Other Assets, net within the Consolidated Balance Sheet. The liability for the non-qualified deferred compensation plan is included in Other long-term liabilities on the Consolidated Balance Sheet and was $12.5 million and $11.3 million as of December 31, 2015 and 2014 , respectively. Multi-Employer Defined Benefit and Contribution Plans The Company contributes to a number of multiemployer defined benefit plans under the terms of collective-bargaining agreements that cover its union-represented employees. The risks of participating in these multiemployer plans are different from single-employer plans in the following aspects: • Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers. • If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. • If the Company chooses to stop participating in one of its multiemployer plans, it may be required to pay the plan an amount based on the underfunded status of the plan, referred to as withdrawal liability. The Company's contributions represented more than 5% of total contributions to the Teamsters Local Union No. 727 and Local 272 Labor Management Benefit Funds for the plan year ending February 28, 2015 and November 30, 2015, respectively. The Company does not represent more than five percent to any other fund. The Company's participation in this plan for the annual periods ended December 31, 2015 , 2014 and 2013 , is outlined in the table below. The "EIN/Pension Plan Number" column provides the Employee Identification Number ("EIN") and the three-digit plan number, if applicable. The zone status is based on information that the Company received from the plan and is certified by the plan's actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded. The "FIP/RP Status Pending/Implemented" column indicates plans for which a Financial Improvement Plan ("FIP") or a Rehabilitation Plan ("RP") is either pending or has been implemented. The " Expiration Date of Collective Bargaining Agreement " column lists the expiration dates of the agreements to which the plans are subject. EIN/ Pension Protection FIP/FR Contributions (millions) Zone Expiration Pension 2015 2014 2013 2015 2014 2013 Surcharge Teamsters Local Union 727 36-61023973 Green Green Green N/A $ 3.5 $ 3.3 $ 3.4 No 2015 10/31/2016 Local 272 Labor Management 13-5673836 Green N/A Green N/A $ 2.2 $ 2.0 $ 2.4 No 2015 3/5/2021 Local 911 (Los Angeles Airport) 216271 Green N/A N/A N/A $ 2.2 $ — $ — No 2015 6/30/2016 Net expenses for contributions not reimbursed by clients and related to multiemployer defined benefit and defined contribution benefit plans were $4.6 million, $2.7 million and $0.6 million in 2015 , 2014 and 2013 , respectively. In the event that the Company decides to cease participating in these plans, the Company could be assessed a withdrawal liability. The Company currently does not have any intentions to cease participating in these multiemployer pension plans and therefore would not trigger the withdrawal liability.

Management Contracts and Relate

Management Contracts and Related Arrangements with Affiliates	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Management Contracts and Related Arrangements with Affiliates	Management Contracts and Related Arrangements with Affiliates Closing Agreements In connection with the Central Merger, on February 28, 2012, the Company entered into initial Closing Agreements (the "Initial Closing Agreements") with each of Lubert-Adler Real Estate Fund V, L.P. and Lubert-Adler Real Estate Parallel Fund V, L.P. (collectively, "Lubert-Adler Entities"); each of Kohlberg Investors V, L.P., Kohlberg TE Investors V, L.P., Kohlberg Partners V, L.P., Kohlberg Offshore Investors V, L.P., and KOCO Investors V, L.P. (collectively, the "Kohlberg Entities"); and each of Versa Capital Fund I, L.P. and Versa Capital Fund I Parallel, L.P. (collectively, the "Versa Entities"). As of the most recent filings with the Securities and Exchange Commission, the Lubert-Adler Entities collectively own approximately 6.0% of our common stock, the Kohlberg Entities collectively own approximately 16.2% of our common stock, and the Versa Entities collectively own approximately 3.7% of our common stock. In addition, Paul Halpern, one of the Company's directors, is affiliated with the Versa Entities; and Jonathan P. Ward and Gordon H. Woodward, both directors, are affiliated with the Kohlberg Entities. Under the Initial Closing Agreements, the Lubert-Adler, Kohlberg and Versa Entities (collectively, the "Central Stockholders") agreed, among other things, to vote their shares of our common stock in accordance with the Board's recommendations or, in specified cases, in proportion to the votes made by the Company's other stockholders, until October 2, 2015. Additionally, the Initial Closing Agreements provide that each Central Stockholder will be subject to a four -year "standstill period" following the closing of the Merger, during which each such Central Stockholder will not, among other things, (i) acquire any additional voting securities of the Company, (ii) seek or propose a merger, acquisition, tender offer or other extraordinary transaction with respect to the Company, (iii) call a meeting of Company stockholders or initiate a stockholder proposal, or (iv) form a "group" with any person with respect to Company securities. The Initial Closing Agreements also impose certain restrictive covenants on some of the Central Stockholders, including, among others, (i) non-compete covenants, (ii) non-solicitation covenants, (iii) confidentiality obligations and (iv) non-disparagement requirements. The foregoing description of the Initial Closing Agreements does not purport to be complete and is qualified in its entirety by reference to the Closing Agreements, copies of which are attached to the Company's Current Report on Form 8-K filed on February 29, 2012 as Exhibits 10.2 through 10.4 and incorporated by reference herein. In connection with the Central Merger, on October 2, 2012, the Company entered into Additional Closing Agreements (the "Additional Closing Agreements") with the Central Stockholders. Pursuant to the terms of the Additional Closing Agreements, the Kohlberg, Lubert-Adler and Versa Entities have each agreed that, until October 2, 2015 and for so long as it owns in the aggregate (together with its affiliates, all other Central stockholders and their respective affiliates and any other persons with which any of the foregoing form a "group") beneficially or of record more than 10% of Company issued and outstanding common stock, to cause the shares of our common stock held by them to be counted as present at any meeting of Company stockholders and to vote, in person or by proxy, all of such shares of Company common stock as follows: From October 2, 2013 until October 2, 2014: • with respect to the election of directors to the Company's Board, "for" any nominees recommended by the Board; and • with respect to all other matters submitted for a vote of Company stockholders, in accordance with the recommendation of the Board with respect to such matters. From October 2, 2014 until October 2, 2015: • with respect to the election of directors to the Board, "for" any nominees recommended by our Board; and • with respect to all other matters submitted for a vote of Company stockholders, in proportion to the votes cast by all of the Company's other stockholders. The Additional Closing Agreements also provide that the Kohlberg, Lubert-Adler and Versa Entities will be subject to a four -year standstill period following the Closing Date, during which time, such Central Stockholder will not, among other things, (i) acquire or agree to acquire any additional voting securities of the Company, (ii) seek or propose a merger, acquisition, tender offer or other extraordinary transaction with or involving the Company or any of its subsidiaries or their respective securities or assets, (iii) call a meeting of the stockholders of the Company or initiate a stockholder proposal or (iv) form a "group" (as defined in Section 13(d)(3) of the Securities Exchange Act of 1934) with any person (other than an affiliate of such Central Stockholder) with respect to the acquisition or voting of any of the Company's voting securities. The Additional Closing Agreements impose certain restrictive covenants on the Kohlberg and Versa Entities, including (i) confidentiality obligations with respect to the Company confidential information and (ii) non- disparagement requirements. The Lubert-Adler Entity is subject to confidentiality obligations with respect to its confidential information pursuant to the terms of its Additional Closing Agreement. The foregoing description of the Additional Closing Agreements does not purport to be complete and is qualified in its entirety by reference to the Additional Closing Agreements, copies of which are attached as Exhibits 10.2 through 10.8 to the Company's Current Report on Form 8-K filed with the SEC on October 2, 2012. Agreements Related to Myron C. Warshauer Myron C. Warshauer was a director from April 2013 to April 2015 and our chief executive officer until October 15, 2001, when his employment period terminated under the employment agreement with him dated as of March 30, 1998. This agreement, which was amended on July 7, 2003 and May 10, 2004, requires the Company to pay Mr. Warshauer various post-employment benefits. For the years ended December 31, 2014 and 2013, Mr. Warshauer received payments of $0.5 million and $0.5 million, respectively, which included payments for health and dental insurance, office space and secretarial coverage. No post-employment benefits were made for the year ended 2015. In addition, the Company entered into a consulting agreement with Shoreline Enterprises, LLC, which is solely owned by Myron C. Warshauer, dated October 16, 2001, as amended on May 10, 2004. Pursuant to this agreement, Mr. Warshauer provided consulting services under the title of Vice Chairman (Emeritus), which title and role is not that of an officer, director, employee or agent of the Company. Under this agreement, the Company paid Shoreline $0.2 million and $0.2 million for the years ended December 31, 2014 and 2013, respectively. No payments were made to Shoreline for the year ended December 31, 2015. Both of these agreements terminated on December 5, 2014. Related Arrangements with Affiliates In 2013 the Company provided property management services for twelve separate retail shopping centers and commercial office buildings in which D&E Parking, Inc. has an ownership interest. Edward Simmons, a former executive officer of the Company, has an ownership interest in D&E. In consideration of the property management services the Company provided for these twelve properties, the Company recorded net management fees totaling $0.3 million for the year ended December 31, 2013. No such management fee was recognized during 2015 and 2014.

Bradley Agreement

Bradley Agreement	12 Months Ended
	Dec. 31, 2015
Contractors [Abstract]
Bradley Agreement	Bradley Agreement The Company entered into a 25 -year agreement with the State of Connecticut ("State") that expires on April 6, 2025, under which it operates the surface parking and 3,500 garage parking spaces at Bradley International Airport ("Bradley") located in the Hartford, Connecticut metropolitan area. The parking garage was financed through the issuance of State of Connecticut special facility revenue bonds and provides that the Company deposits, with the trustee for the bondholders, all gross revenues collected from operations of the surface and garage parking. From these gross revenues, the trustee pays debt service on the special facility revenue bonds outstanding, operating and capital maintenance expense of the surface and garage parking facilities, and specific annual guaranteed minimum payments to the state. Principal and interest on the Bradley special facility revenue bonds increase from approximately $3.6 million in contract year 2002 to approximately $4.5 million in contract year 2025. Annual guaranteed minimum payments to the State increase from approximately $8.3 million contract year 2002 to approximately $13.2 million in contract year 2024. The annual minimum guaranteed payment to the State by the trustee for the twelve months ended December 31, 2015 and 2014 was $11.0 million and $10.8 million, respectively. All of the cash flow from the parking facilities are pledged to the security of the special facility revenue bonds and are collected and deposited with the bond trustee. Each month the bond trustee makes certain required monthly distributions, which are characterized as "Guaranteed Payments." To the extent the monthly gross receipts generated by the parking facilities are not sufficient for the trustee to make the required Guaranteed Payments, the Company is obligated to deliver the deficiency amount to the trustee, with such deficiency payments representing interest bearing advances to the trustee. The Company does not directly guarantee the payment of any principal or interest on any debt obligations of the State of Connecticut or the trustee. The following is the list of Guaranteed Payments: • Garage and surface operating expenses, • Principal and interest on the special facility revenue bonds, • Trustee expenses, • Major maintenance and capital improvement deposits; and • State minimum guarantee. To the extent sufficient funds exist, the trustee is then directed to reimburse the Company for deficiency payments up to the amount of the calculated surplus, with the Company having the right to be repaid the principal amount of any and all deficiency payments, together with actual interest and premium, not to exceed 10% of the initial deficiency payment. The Company calculates and records interest and premium income along with deficiency principal repayments as a reduction of cost of parking services in the period the associated deficiency repayment is received from the trustee. The Company believes these advances to be fully recoverable as the Bradley Agreement places no time restriction on the Company's right to reimbursement. The reimbursement of principal, interest and premium will be recognized when received. The total deficiency payments, net of reimbursements, as of December 31, 2015 and 2014 are as follows: December 31, (millions) 2015 2014 Balance at beginning of year $ 13.3 $ 14.6 Deficiency payments made 0.1 — Deficiency repayment received (1.8 ) (1.3 ) Balance at end of year $ 11.6 $ 13.3 For the year ended December 31, 2015 , the Company received deficiency repayments (net of deficiency payments made) of $1.7 million and received interest of $0.4 million and premium of $0.2 million, with the net of these amounts recorded as reduction in Cost of parking services within the Consolidated Statements of Income. For the year ended December 31, 2014 , the Company received deficiency payments (net of deficiency payments made) of $1.3 million and received interest of $0.5 million and premium of $0.1 million, with the net of these amounts recorded as additional cost of parking services within the Consolidated Statements of Income. There were no amounts of estimated deficiency payments accrued as of December 31, 2015 , as the Company concluded that the potential for future deficiency payments did not meet the criteria of both probable and estimable. In addition to the recovery of certain general and administrative expenses incurred, the Bradley Agreement provides for an annual management fee payment, which is based on operating profit tiers. The annual management fee is further apportioned 60% to the Company and 40% to an un-affiliated entity and the annual management fee will be paid to the extent funds are available for the trustee to make distribution, and are paid after Guaranteed Payments (as defined in the Bradley Agreement) repayment of all deficiency payments, including interest and premium. Cumulative management fees of approximately $15.7 million and $14.7 million have not been recognized as of December 31, 2015 and 2014 , respectively, and no management fees were recognized as revenue during 2015 , 2014 or 2013 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The components of accumulated other comprehensive income (loss) is comprised of unrealized gains (losses) on cash flow hedges and foreign currency translation adjustments. The components of changes in accumulated comprehensive income (loss), net of taxes, were as follows: (millions) Foreign Effective Portion Total Balance as of December 31, 2012 $ 0.1 $ (0.5 ) $ (0.4 ) Change in other comprehensive income (loss) (0.5 ) 1.0 0.5 Balance as of December 31, 2013 (0.4 ) 0.5 0.1 Change in other comprehensive income (loss) (0.2 ) (0.2 ) (0.3 ) Balance as of December 31, 2014 (0.5 ) 0.3 (0.2 ) Change in other comprehensive income (loss) (0.7 ) (0.2 ) (0.9 ) Balance as of December 31, 2015 $ (1.2 ) $ 0.1 $ (1.1 ) Note: Amounts may not foot due to rounding.

Legal Proceedings

Legal Proceedings	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings	Legal Proceedings The Company is subject to litigation in the normal course of its business. The outcomes of legal proceedings and claims brought against it and other loss contingencies are subject to significant uncertainty. The Company accrues a charge against income when its management determines that it is probable that an asset has been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. In addition, the Company accrues for the authoritative judgments or assertions made against it by government agencies at the time of their rendering regardless of its intent to appeal. In addition, the Company is from time-to-time party to litigation administrative proceedings and union grievances that arise in the normal course of business, and occasionally pays non-material amounts to resolve claims or alleged violations of regulatory requirements. There are no "normal course" matters that separately or in the aggregate, would, in the opinion of management, have a material adverse effect on its operation, financial condition or cash flow. In determining the appropriate accounting for loss contingencies, the Company considers the likelihood of loss or impairment of an asset or the incurrence of a liability, as well as its ability to reasonably estimate the amount of loss. The Company regularly evaluates current information available to determine whether an accrual should be established or adjusted. Estimating the probability that a loss will occur and estimating the amount of a loss or a range of loss involves significant judgment.

Domestic and Foreign Operations

Domestic and Foreign Operations	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Domestic and Foreign Operations	Domestic and Foreign Operations Business Unit Segment Information Segment information is presented in accordance with a "management approach," which designates the internal reporting used by the chief operating decision maker for making decisions and assessing performance as the source of the Company's reportable segments. The Company's segments are organized in a manner consistent with which separate financial information is available and evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing the Company's overall performance. An operating segment is defined as a component of an enterprise that engages in business activities from which it may earn revenue and incur expenses, and about which separate financial information is regularly evaluated by the chief operating decision maker. The chief operating decision maker is the Company's president and chief executive officer. The business is managed based on regions administered by executive vice presidents. Each of the operating segments is directly responsible for revenue and expenses related to their operations including direct regional administrative costs. Finance, information technology, human resources, and legal are shared functions that are not allocated back to the four operating segments. The chief operating decision maker assesses the performance of each operating segment using information about its revenue and operating income (loss) before interest, taxes, and depreciation and amortization, but does not evaluate operating segments using discrete asset information. There are no inter-segment transactions and the Company does not allocate interest and other income, interest expense, depreciation and amortization or taxes to operating segments. The accounting policies for segment reporting are the same as for the Company as a whole. On January 1, 2015, the Company changed its internal reporting segment information reported to its CODM. All periods presented have been restated to reflect the new internal reporting to the CODM. The following includes the current internal reporting: • Region One encompasses operations in Delaware, District of Columbia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Northern California, Ohio, Oregon, Pennsylvania, Rhode Island, Virginia, Washington, West Virginia, Wisconsin and three Canadian provinces of Alberta, Ontario and Quebec. • Region Two encompasses operations in Alabama, Arizona, Colorado, Florida, Georgia, Hawaii, Kansas, Louisiana, Mississippi, Missouri, Nebraska, New Mexico, North Carolina, Oklahoma, South Carolina, Southern California, Tennessee, Texas, Utah and Puerto Rico. • Region Three encompasses operations in the New York metropolitan tri-state area of New York, New Jersey and Connecticut. • Region Four encompasses all major airport and transportation operations nationwide. • Region Five encompasses other reporting units of USA Parking and event planning and transportation services. • Other consists of ancillary revenue that is not specifically identifiable to a region and insurance reserve adjustments related to prior years. The following is a summary of revenues (excluding reimbursed management contract revenue) and gross profit by operating segment for the years ended December 31, 2015 , 2014 and 2013 : Year Ended December 31, (millions) 2015 Gross 2014 Gross Margin 2013 Gross Parking services revenue (a) Region One Lease contracts $ 208.1 $ 206.0 $ 199.1 Management contracts 84.7 84.0 95.3 Total Region One 292.8 290.0 294.4 Region Two Lease contracts 125.7 119.9 124.0 Management contracts 79.6 83.2 87.0 Total Region Two 205.3 203.1 211.0 Region Three Lease contracts 108.8 117.8 120.6 Management contracts 27.8 25.8 23.4 Total Region Three 136.6 143.6 144.0 Region Four Lease contracts 123.8 48.5 43.7 Management contracts 100.6 103.3 96.6 Total Region Four 224.4 151.8 140.3 Region Five Lease contracts 4.4 2.7 2.6 Management contracts 43.8 29.8 33.7 Total Region Five 48.2 32.5 36.3 Other Lease contracts — 1.7 (0.4 ) Management contracts 13.9 12.2 11.3 Total Other 13.9 13.9 10.9 Reimbursed management contract revenue 694.7 679.8 629.9 Total revenues $ 1,615.9 $ 1,514.7 $ 1,466.8 Gross Profit Region One Lease contracts 12.5 6 % 12.4 6 % $ 10.6 5 % Management contracts 38.0 45 % 36.0 43 % 42.8 45 % Total Region One 50.5 48.4 53.4 Year Ended December 31, (millions) 2015 Gross 2014 Gross Margin 2013 Gross Region Two Lease contracts 21.1 17 % 19.8 17 % 18.9 15 % Management contracts 32.9 41 % 35.8 43 % 38.8 45 % Total Region Two 54.0 55.6 57.7 Region Three Lease contracts 2.2 2 % 4.7 4 % (0.1 ) — % Management contracts 14.2 51 % 14.3 55 % 12.6 54 % Total Region Three 16.4 19.0 12.5 Region Four Lease contracts 5.5 4 % 3.6 7 % 3.2 7 % Management contracts 24.5 24 % 26.4 26 % 24.6 25 % Total Region Four 30.0 30.0 27.8 Region Five Lease contracts 0.3 7 % 0.2 8 % — (2 )% Management contracts 11.4 26 % 11.7 39 % 11.3 34 % Total Region Five 11.7 11.9 11.3 Other Lease contracts (3.5 ) N/A 0.2 N/A 0.9 N/A Management contracts 11.0 N/A 6.2 N/A 8.5 N/A Total Other 7.5 6.4 9.4 Total gross profit 170.1 171.3 172.1 General and administrative expenses 97.3 101.5 98.9 General and administrative 57 % 59 % 57 % Depreciation and amortization 34.0 30.3 31.2 Operating income 38.8 39.5 42.0 Other expenses (income): Interest expense 12.7 17.8 19.0 Interest income (0.2 ) (0.4 ) (0.6 ) Gain on sale of business (0.5 ) — — Gain on contribution of a — (4.1 ) — Equity in losses from 1.7 0.3 — 13.7 13.6 18.4 Income before income taxes 25.1 25.9 23.6 Income tax (benefit) expense 4.8 (0.2 ) 8.8 Net income 20.3 26.1 14.8 Less: Net income attributable 2.9 3.0 2.7 Net income attributable $ 17.4 $ 23.1 $ 12.1 On January 1, 2016, the Company changed its internal reporting segment information reported to its CODM. The Company will prospectively report on the following regions beginning in 2016 and restate prior periods presented to reflect the internal reporting to the CODM: • Region One (Urban) encompasses operations in Alabama, Arizona, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Mexico, North Carolina, Northern California, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Southern California, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Puerto Rico, and three Canadian provinces of Alberta, Ontario and Quebec. • Region Two (Airport transportation) encompasses all major airport and transportation operations nationwide. • Region Three encompasses other reporting units of USA Parking and event planning and transportation services. • Other consists of ancillary revenue that is not specifically identifiable to a region and certain unallocated insurance reserve adjustments.

Unaudited Quarterly Results

Unaudited Quarterly Results	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Results	Unaudited Quarterly Results The following table sets forth the Company's unaudited quarterly consolidated statement of income data for the years ended December 31, 2015 and December 31, 2014 . The unaudited quarterly information has been prepared on the same basis as the annual financial information and, in management's opinion, includes all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the information for the quarters presented. Historically, the Company's operating results have varied from quarter to quarter and are expected to continue to fluctuate in the future. These fluctuations have been due to a number of factors, including: general economic conditions in its markets; acquisitions; additions of contracts; expiration and termination of contracts; conversion of lease contracts to management contracts; conversion of management contracts to lease contracts and changes in terms of contracts that are retained and timing of general and administrative expenditures. The operating results for any historical quarter are not necessarily indicative of results for any future period. 2015 2014 (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 $ 135.8 $ 146.4 $ 146.6 $ 142.1 $ 116.6 $ 125.0 $ 129.0 $ 126.0 Management contracts 94.1 88.3 85.8 82.1 90.0 84.9 77.9 85.5 Reimbursed management contract revenue 174.3 170.9 168.3 181.2 169.2 164.5 173.4 172.7 Total revenue 404.2 405.6 400.7 405.4 375.8 374.4 380.3 384.2 Cost of parking services Lease contracts 128.7 134.5 136.0 133.6 112.1 112.0 116.5 115.1 Management contracts 60.0 53.8 53.6 50.9 59.2 50.0 46.8 51.9 Reimbursed management contract expense 174.3 170.9 168.3 181.2 169.2 164.5 173.4 172.7 Total cost of parking services 363.0 359.2 357.9 365.7 340.5 326.5 336.7 339.7 Gross profit Lease contracts 7.1 11.9 10.6 8.5 4.5 13.0 12.5 10.9 Management contracts 34.1 34.5 32.2 31.2 30.8 34.9 31.1 33.6 Total gross profit 41.2 46.4 42.8 39.7 35.3 47.9 43.6 44.5 General and administrative expenses 25.7 24.7 23.8 23.1 26.1 25.0 24.1 26.3 Depreciation and amortization 7.9 8.2 8.2 9.7 7.2 7.7 7.6 7.8 Operating income 7.6 13.5 10.8 6.9 2.0 15.2 11.9 10.4 Other expense (income) Interest expense 4.0 3.0 3.0 2.7 4.8 4.8 4.2 4.0 Interest income (0.1 ) — — (0.1 ) (0.1 ) (0.1 ) (0.1 ) (0.1 ) Gain on sale of business — — (0.5 ) — — — — — Gain on contribution of a business to an unconsolidated entity — — — — — — — (4.1 ) Equity in losses from investment in unconsolidated entity 0.5 0.3 0.4 0.5 — — — 0.3 Total other expenses (income) 4.4 3.3 2.9 3.1 4.7 4.7 4.1 0.1 Earnings (loss) before income taxes 3.2 10.2 7.9 3.8 (2.7 ) 10.5 7.8 10.3 Income tax expense (benefit) 1.3 (0.4 ) 3.5 0.4 (7.4 ) 4.2 2.8 0.2 Net income 1.9 10.6 4.4 3.4 4.7 6.3 5.0 10.1 Less: Net income attributable to noncontrolling interest 0.5 0.8 0.8 0.8 0.5 0.9 0.8 0.8 Net income attributable to SP Plus Corporation $ 1.4 $ 9.8 $ 3.6 $ 2.6 $ 4.2 $ 5.4 $ 4.2 $ 9.3 Common stock data Net income per share Basic $ 0.06 $ 0.44 $ 0.17 $ 0.11 $ 0.20 $ 0.24 $ 0.20 $ 0.42 Diluted $ 0.06 $ 0.43 $ 0.16 $ 0.11 $ 0.19 $ 0.24 $ 0.19 $ 0.41 Weighted average shares outstanding Basic 22,127,725 22,145,190 22,205,707 22,276,763 21,977,836 21,991,965 21,997,394 22,071,706 Diluted 22,528,608 22,521,832 22,548,166 22,486,888 22,351,845 22,398,886 22,426,787 22,451,557

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 19, 2016, the Company and Central’s former stockholders received a non-appealable and binding decision from an independent public accounting firm indicating that Net Debt Working Capital as of September 30, 2012 was $291.6 million , or $6.6 million above the Upper Threshold. Therefore, the Company recognized an expense of $1.6 million ( $0.9 million , net of tax) in General and administrative expenses for certain of the other amounts disallowed under the Net Debt Working Capital calculation as of and for the year ended December 31, 2015, respectively. See Note 2. Acquisition for disclosure regarding the non-appealable and binding decision by the independent public accounting firm on Net Debt Working Capital, including impacts to our Consolidated Financial Statements, and the Company's indemnification from Central's former stockholders for for certain defined adverse consequences as set forth in the Merger Agreement (including with respect to Structural and Repair Costs).

Schedule II-Valuation and Quali

Schedule II-Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	VALUATION AND QUALIFYING ACCOUNTS Description Balance at Additions Reductions (1) Balance at (millions) Allowance for doubtful accounts Year ended December 31, 2015 $ 1.0 $ 0.7 $ (0.8 ) $ 0.9 Year ended December 31, 2014 0.7 0.7 (0.5 ) 1.0 Year ended December 31, 2013 $ 0.5 $ 0.6 $ (0.4 ) $ 0.7 Tax valuation account Year ended December 31, 2015 $ 12.3 — (5.5 ) $ 6.8 Year ended December 31, 2014 21.3 — (9.0 ) $ 12.3 Year ended December 31, 2013 $ 25.3 2.1 (6.0 ) $ 21.3 (1) Represents uncollectible accounts written off and reversal of provision.

Significant Accounting Polici30

Significant Accounting Policies and Practices (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly owned subsidiaries, and Variable Interest Entities ("VIEs") in which the Company is the primary beneficiary. All significant intercompany profits, transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current environment.
Foreign Currency Translation	Foreign Currency Translation The functional currency of the Company's foreign operations is the local currency. Accordingly, assets and liabilities of the Company's foreign operations are translated from foreign currencies into U.S. dollars at the rates in effect on the balance sheet date while income and expenses are translated at the weighted-average exchange rates for the year. Adjustments resulting from the translations of foreign currency financial statements are accumulated and classified as a separate component of stockholders' equity.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents represent funds temporarily invested in money market instruments with maturities of three months or less. Cash equivalents are stated at cost, which approximates fair value.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts Accounts receivable, net of the allowance for doubtful accounts, represents the Company's estimate of the amount that ultimately will be realized in cash. Management reviews the adequacy of its allowance for doubtful accounts on an ongoing basis, using historical collection trends, aging of receivables, and a review of specific accounts, and makes adjustments in the allowance as necessary. Changes in economic conditions or other circumstances could have an impact on the collection of existing receivable balances or future allowance considerations.
Leasehold Improvements, Equipment, Land and Construction in Progress, net	Leasehold Improvements, Equipment, Land and Construction in Progress, net Leasehold improvements, equipment, software, vehicles, and other fixed assets are stated at cost less accumulated depreciation and amortization. Equipment is depreciated on the straight-line basis over the estimated useful lives ranging from 2 to 10 years. Expenditures for major renewals and improvements that extend the useful life of property and equipment are capitalized. Leasehold improvements are amortized on the straight-line basis over the terms of the respective leases or the service lives of the improvements, whichever is shorter (weighted average remaining life of approximately 8.2 years). Certain costs associated with directly obtaining, developing or upgrading internal-use software are capitalized and amortized over the estimated useful life of software.
Cost of Contracts	Cost of Contracts Cost of contracts represents the cost of obtaining contractual rights associated with providing parking services at a managed or leased facility. Cost of parking contracts are amortized over the estimated life of the contracts, including anticipated renewals and terminations. Estimated lives are based on the contract life or anticipated lives of the contract.
Goodwill and Other Intangibles	Goodwill and Other Intangibles Goodwill represents the excess of purchase price paid over the fair value of net assets acquired. In accordance with the Financial Accounting Standards Board's ("FASB") authoritative accounting guidance on goodwill, the Company does not amortize goodwill but rather evaluates it for impairment on an annual basis, or more often if events or circumstances change that could cause goodwill to become impaired. The Company has elected to assess the impairment of goodwill annually on the first day of its fiscal fourth quarter, or at an interim date if there is an event or change in circumstances indicate the carrying value may not be recoverable. Factors that could trigger an impairment review include significant under-performance relative to expected historical or projected future operating results, significant changes in the use of acquired assets or its business strategy, and significant negative industry or economic trends. A multi-step impairment test is performed on goodwill. The Company has the option to evaluate various qualitative factors to determine the likelihood of impairment. If determined that it is more likely than not the fair value is less than the carrying value of a reporting unit, then the Company is required to perform Step 1. If the Company does not elect to perform a qualitative assessment, it can voluntarily proceed directly to Step 1. In Step 1, the Company performs a quantitative analysis to compare the fair value of the reporting unit to its carrying value including goodwill. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not considered impaired, and the Company's is not required to perform further testing. If the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, then the Company must perform Step 2 of t he impairment test in order to determine the implied fair value of the reporting unit's goodwill. If the carrying value of a reporting unit's goodwill exceeds its implied fair value, then the Company would record an impairment loss equal to the difference. The goodwill impairment test is performed at the reporting unit level; the Company's reporting units represent its operating segments, consisting of the North reporting unit, South reporting unit, NY Metropolitan tri-state area of New York, New Jersey and Connecticut reporting unit, Airport transportation services reporting unit, USA Parking reporting unit and event planning and transportation services reporting unit. The December 31, 2015 goodwill balances by reportable segment are presented in detail in Note. 9 Goodwill. Management determines the fair value of each of its reporting units by using a discounted cash flow approach and a market approach using multiples of EBITDA of comparable companies to estimate market value. In addition, the Company compares its derived enterprise value on a consolidated basis to the Company's market capitalization as of its test date to ensure its derived value approximates the market value of the Company when taken as a whole. In conducting its goodwill impairment quantitative assessment, the Company analyzed actual and projected growth trends of the reporting unit, gross margin, operating expenses and EBITDA (which also includes forecasted five -year income statement and working capital projections, a market-based weighted average cost of capital and terminal values after five years). The Company also assesses critical areas that may impact its business including economic conditions, market related exposures, competition, changes in product offerings and changes in key personnel for each of its reporting unit's. As part of the 2015 and 2014 annual goodwill assessments, the Company engaged a third party to evaluate its reporting unit's fair values. The Company will continue to perform a goodwill impairment test as required on an annual basis and on an interim basis, if certain conditions exist. Factors the Company considers important, which could result in changes to its estimates, include under-performance relative to historical or projected future operating results and declines in acquisitions and trading multiples. Due to the broad customer base, the Company does not believe its future operating results will vary significantly relative to its historical and projected future operating results. However, future events may indicate differences from its judgments and estimates which could, in turn, result in impairment charges in the future. Future events that may result in impairment charges include increases in interest rates, which would impact discount rates, unfavorable economic conditions or other factors which could decrease revenues and profitability of existing locations and changes in the cost structure of existing facilities. Factors that could potentially have an unfavorable economic effect on management's judgments and estimates include, among others: changes imposed by governmental and regulatory agencies, such as property condemnations and assessment of parking-related taxes; construction or other events that could change traffic patterns; and terrorism or other catastrophic events. Intangible assets with finite lives are amortized over their estimated useful lives and reviewed for impairment when circumstances change that would create a triggering event. Intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives. The Company evaluates the remaining useful life of the other intangible assets on a periodic basis to determine whether events or circumstances warrant a revision to the remaining useful life. Assumptions and estimates about future values and remaining useful lives of its intangible and other long-lived assets are complex and subjective. They can be affected by a variety of factors, including external factors such as industry and economic trends, and internal factors, such as changes in its business strategy and internal forecasts. Although management believes the historical assumptions and estimates are reasonable and appropriate, different assumptions and estimates could materially impact its reported financial results.
Long-Lived Assets	Long-Lived Assets The Company evaluates long-lived asset groups whenever events or circumstances indicate that the carrying value of an asset or asset group may not be recoverable. Events or circumstances that would result in an impairment review primarily include a significant change in the use of an asset, or the planned sale or disposal of an asset. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the asset to future undiscounted cash flows expected to be generated by the asset group. If it is determined to be impaired, the impairment recognized is measured by the amount by which the carrying value of the asset exceeds its fair value. The Company's estimates of future cash flows from such assets could be impacted if it underperforms relative to historical or projected future operating results. Assumptions and estimates used to determine cash flows in the evaluation of impairment and the fair values used to determine the impairment are subject to a degree of judgment and complexity. Any changes to the assumptions and estimates resulting from changes in actual results or market conditions from those anticipated may affect the carrying value of long-lived assets and could result in an impairment charge.
Debt Issuance Costs	Debt Issuance Costs The costs of obtaining financing are capitalized and amortized as interest expense over the term of the respective financing using the effective interest method.
Financial Instruments	Financial Instruments The carrying values of cash, accounts receivable and accounts payable approximate their fair value due to the short-term nature of these financial instruments. Book overdrafts of $25.8 million and $30.8 million are included within Accounts payable within the Consolidated Balance Sheets as of December 31, 2015 , and 2014 , respectively. Long-term debt has a carrying value that approximates fair value because these instruments bear interest at variable market rates.
Insurance Reserves	Insurance Reserves The Company purchases comprehensive casualty insurance covering certain claims that arise in connection with its operations. In addition, the Company purchases umbrella/excess liability coverage. Under our various liability and workers' compensation insurance policies, the Company is obligated to pay directly or reimburse the insurance carrier for the first $0.5 million of each loss covered by its general/garage liability or automobile liability policies and $0.3 million for each loss covered by its workers' compensation and garage keepers legal liability policies. As a result, the Company is, in effect, self-insured for all claims up to these levels. The Company applies the provisions as defined in the guidance related to accounting for contingencies, in determining the timing and amount of expense recognition associated with claims against the Company. The expense recognition is based upon the Company's determination of an unfavorable outcome of a claim being deemed as probable and capable of being reasonably estimated, as defined in the guidance related to accounting for contingencies. This determination requires the use of judgment in both the estimation of probability and the amount to be recognized as an expense. The Company utilizes historical claims experience along with regular input from third party insurance advisers in determining the required level of insurance reserves. Future information regarding historical loss experience may require changes to the level of insurance reserves and could result in increased expense recognition in the future.
Legal and Other Commitments and Contingencies	Legal and Other Commitments and Contingencies The Company is subject to litigation in the normal course of its business. The Company applies the provisions as defined in the guidance related to accounting for contingencies in determining the recognition and measurement of expense recognition associated with legal claims against the Company. Management uses guidance from internal and external legal counsel on the potential outcome of litigation in determining the need to record liabilities for potential losses and the disclosure of pending legal claims. Certain lease contracts acquired in the Central Merger include provisions allocating to the Company responsibility for the cost of certain structural and other repairs required to be made to the leased property, including improvement and repair costs arising as a result of ordinary wear and tear. The Company recorded $4.6 million , $1.3 million and $nil for the year ended December 31, 2015, 2014 and 2013, respectively, of costs (net of expected recoveries of the total cost recognized by the Company through the applicable indemnity discussed further in Note 2. Acquisition ) in Cost of parking services-Lease contracts within the Consolidated Statements of Income for structural and other repair costs related to certain lease contracts acquired in the Central Merger, whereby the Company has expensed repair costs for certain leases and engaged third-party general contractors to complete certain structural and other repair projects, and other indemnity related costs. The Company expects to incur additional costs for certain structural and other repair costs pursuant to the contractual requirements of certain lease contracts acquired in the Central Merger ("Structural and Repair Costs"). Based on information available at this time, the Company currently expects to incur additional Structural and Repair Costs of $1.5 million . While the Company is unable to estimate with certainty when such remaining costs will be incurred, it is expected that a substantial majority of these costs will be incurred in early- to mid-calendar year 2016. The Company currently expects to recover 80% of the Structural and Repair Costs incurred and related to certain lease contracts acquired in the Central Merger through the applicable indemnity discussed further in Note 2. Acquisition.
Interest Rate Swaps	Interest Rate Swaps In October 2012, the Company entered into Interest Rate Swap transactions (collectively, the "Interest Rate Swaps") with each of JPMorgan Chase Bank, N.A., Bank of America, N.A. and PNC Bank, N.A. in an initial aggregate Notional Amount of $150.0 million (the "Notional Amount"). The Interest Rate Swaps have a termination date of September 30, 2017. The Interest Rate Swaps effectively fix the interest rate on an amount of variable interest rate borrowings under the Company's credit agreements, originally equal to the Notional Amount at 0.7525% per annum plus the applicable margin rate for LIBOR loans under the Company's credit agreements determined based upon the Company's consolidated total debt to EBITDA ratio. The Notional Amount is subject to scheduled quarterly amortization that coincides with quarterly prepayments of principal under the credit agreements. These Interest Rate Swaps are classified as cash flow hedges, and the Company calculates the effectiveness of the hedge on a monthly basis. The ineffective portion of the cash flow hedge is recognized in earnings as an increase to interest expense. As of December 31, 2015 , no ineffective portion of cash flow hedges has been recognized in interest expense. See Note 10. Fair Value Measurement for the fair value of the interest rate swap for the year ended December 31, 2015 and 2014 . The Company does not enter into derivative instruments for any purpose other than cash flow hedging purposes.
Parking Services Revenue	Parking Services Revenue The Company's revenues are primarily derived from leased locations, managed properties and the providing of ancillary services, such as accounting, payments received for exercising termination rights, consulting development fees, gains on sales of contracts, insurance (general, workers' compensation and health care) and other value-added services. In accordance with the guidance related to revenue recognition, revenue is recognized when persuasive evidence of an arrangement exists, the fees are fixed or determinable, and collectability is reasonably assured and as services are provided. The Company recognizes gross receipts (net of taxes collected from customers) as revenue from leased locations, and management fees for parking services, as the related services are provided. Ancillary services are earned from management contract properties and are recognized as revenue as those services are provided.
Cost of Parking Services	Cost of Parking Services The Company recognizes costs for leases, non-reimbursed costs from managed facilities and reimbursed expense as cost of parking services. Cost of parking services consists primarily of rent and payroll related costs.
Reimbursed Management Contract Revenue and Expense	Reimbursed Management Contract Revenue and Expense The Company recognizes as both revenues and expenses, in equal amounts, costs incurred by the Company that are directly reimbursed from its management clients. The Company has determined it is the principal in these transactions, as defined in Accounting Standard Codification (ASC) 605-45 P rincipal Agent Considerations , based on the indicators of gross revenue reporting. As the principal, the Company is the primary obligor in the arrangement, has latitude in establishing price, discretion in supplier selection, and the Company assumes credit risk.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and are included in General and administrative expenses within the Consolidated Statements of Income.
Stock-Based Compensation	Stock-Based Compensation Share based payments to employees including grants of employee stock options, restricted stock units and performance-based share units are measured at the grant date, based on the estimated fair value of the award, and the related expense is recognized over the requisite employee service period or performance period (generally the vesting period) for awards expected to vest (considering estimated forfeitures).
Equity Investment in Unconsolidated Entities	Equity Investment in Unconsolidated Entities The Company has ownership interests in 38 partnerships, joint ventures or similar arrangements which operate parking facilities, of which 27 are VIEs and 11 are voting interest model entities where the Company's ownership interests range from 30 - 50 percent and for which there are no indicators of control. The Company accounts for such investments under the equity method of accounting, and its underlying share of each investee's equity is included in Equity Investment in Unconsolidated Entities within the Consolidated Balance Sheets. As the operations of these entities are consistent with the Company's underlying core business operations, the equity in earnings of these investments are included in Parking Services Revenue - Lease Contracts within the Consolidated Statements of Income. The equity earnings in these related investments were $2.0 million, $1.9 million, and $2.1 million for the year ended December 31, 2015 , 2014 and 2013 , respectively. In October 2014, the Company entered into an agreement to establish a joint venture with Parkmobile USA, Inc. ("Parkmobile USA") and contributed all of the assets and liabilities of its proprietary Click and Park parking prepayment business in exchange for a 30 percent interest in the newly formed legal entity called Parkmobile, LLC ("Parkmobile"). The joint venture of Parkmobile provides on-demand and prepaid transaction processing for on- and off-street parking and transportation services. The contribution of the Click and Park business in the joint venture resulted in a loss of control of the business, and therefore it was deconsolidated from the Company's financial statements. As a result of the deconsolidation, the Company recognized a pre-tax gain of $4.1 million, which was measured as the fair value of the consideration received in the form of a 30 percent interest in Parkmobile less the carrying amount of the former business' net assets, including goodwill. The pre-tax gain is reflected in Gain on a sale of business within the Consolidated Statements of Income. The Company accounts for its investment in the joint venture with Parkmobile using the equity method of accounting, and its underlying share of equity in Parkmobile is included in Equity investments in unconsolidated entities within the Consolidated Balance Sheets. The equity earnings in the Parkmobile joint venture are included in Equity Investments in Unconsolidated Entities within the Consolidated Statements of Income.
Non-Controlling Interests	Non-Controlling Interests Noncontrolling interests represent the noncontrolling holders' percentage share of income or losses from the subsidiaries in which the Company holds a majority, but less than 100 percen t, ownership interest and the results of which are consolidated and included within in our consolidated financial statements.
Sale of Business	Sale of Business During the third quarter 2015, the Company signed an agreement to sell and subsequently sold portions of the Company’s security business primarily operating in the Southern California market to a third-party for a gross sales price of $1.8 million , which resulted in a gain on sale of business of $0.5 million , net of legal and other expenses. The pre-tax gain is reflected in Gain on sale of a business within the Consolidated Statements of Income. The assets under the sale agreement met the definition of a business as defined by ASU 805-10-55-4. Cash consideration received during the third quarter 2015, net of legal and other expenses, was $1.0 million with the remaining consideration for the sale of the business being classified as contingent consideration, which per the sale agreement is based on the performance of the business and retention of current customers over an eighteen -month period, and due from the buyer in February 2017. The contingent consideration was valued at fair value as of the date of sale of the business and resulted in the Company recognizing a contingent consideration receivable from the buyer in the amount of $0.5 million . The pre-tax profit for the operations of the sold business was not significant to prior periods presented. See Note 10. Fair Value Measurement for the fair value of the contingent consideration receivable as of December 31, 2015
Income Taxes	Income Taxes Income tax expense involves management judgment as to the ultimate resolution of any tax issues. Historically, our assessments of the ultimate resolution of tax issues have been reasonably accurate. The current open issues are not dissimilar from historical items. Deferred income taxes are computed using the asset and liability method, such that deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between financial reporting amounts and the tax bases of existing assets and liabilities based on currently enacted tax laws and tax rates in effect for the periods in which these temporary differences are expected to reverse or settle. Income tax expense is the tax payable for the period plus the change during the period in deferred income taxes. The Company has certain state net operating loss carry forwards which expire in 2035. The Company's ability to fully utilize these net operating losses to offset state taxable income is limited due to the change in ownership resulting from the initial public offering of our stock in 2004 (Internal Revenue Code, Section 382). The Company considers a number of factors in its assessment of the recoverability of its net operating loss carryforwards including their expiration dates, the limitations imposed due to the change in ownership as well as future projections of income. Future changes in the Company's operating performance along with these considerations may significantly impact the amount of net operating losses ultimately recovered, and its assessment of their recoverability. When evaluating our tax positions, the Company accounts for uncertainty in income taxes in its consolidated financial statements. The evaluation of a tax position is a two-step process, the first step being recognition. The Company determines whether it is more-likely-than-not that a tax position will be sustained upon tax examination, including resolution of any related appeals or litigation, based on only the technical merits of the position. If a tax position does not meet the more-likely-than-not threshold, the benefit of that position is not recognized in our financial statements. The second step is measurement. The tax position is measured as the largest amount of benefit that is more-likely-than-not of being realized upon ultimate resolution with a taxing authority.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted Accounting Pronouncements In April 2015, the Financial Accounting Standards Board ("the FASB") issued Accounting Standards Update ("ASU") No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs . ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. ASU 2015-03 requires retrospective application and represents a change in accounting principle. ASU 2015-03 is effective for fiscal years beginning after December 15, 2015 with early adoption being permitted for financial statements that have not been previously issued. The Company adopted ASU 2015-03 in December 2015 on a retrospective basis and reclassified debt issuance costs from Other assets to a direct reduction from the carrying amount of the (i) Current portion of obligations under the Restated Senior Credit Facility borrowings and (ii) Long-term obligations under the Restated Credit Facility borrowings within the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014. See Note 11. Borrowing Arrangements for further detail on the Company's debt instruments. Accounting Pronouncements to be Adopted In February 2016, the FASB issued ASU No. 2016-2, Leases (Topic 842). ASU 2016-2 requires lessees to move most leases to the balance sheet and recognize expense, similar to current accounting guidance, on the income statement. Additionally, the classification criteria and the accounting for sales-type and direct financing leases is modified for lessors. Under ASU 2016-2, all entities will classify leases to determine: (i) lease-related revenue and expense and (ii) for lessors, amount recorded on the balance sheet. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, with full retrospective application being prohibited. ASU 2016-2 is effective for interim and annual reporting periods beginning after December 15, 2018. These and other changes to accounting for leases under ASU 2016-2 are currently being evaluated by the Company for impacts to the Company's financial position, results of operations, cash flows and financial statement disclosures. In January 2016, the FASB issued ASU No. 2016-1, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-1 amends various areas of the accounting for financial instruments. Key provisions of the amendment currently being evaluated by the Company requires (i) equity investments to be measured at fair value (except those accounted for under the equity method), (ii) the simplification of equity investment impairment determination, (iii) certain changes to the fair value measurement of financial instruments measured at amortized cost, (iv) the separate presentation, in other comprehensive income, the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (given certain conditions), and (v) the evaluation for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the Company's other deferred tax assets. ASU 2016-1 is effective for interim and annual reporting periods beginning after December 15, 2017. These provisions and others of ASU 2016-1 are currently being assessed by the Company for impacts on the Company's financial position, results of operations, cash flows and financial statement disclosures. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments . ASU 2015-16 requires that an acquirer in a business combination recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendment requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The ASU also requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. ASU 2015-16 is effective for interim and annual reporting periods beginning after December 15, 2015. The Company is currently assessing the impact of adopting the standard on the Company's financial position, results of operations, cash flows and financial statement disclosures. In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement . This ASU provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The new guidance does not change the accounting for a customer’s accounting for service contracts. ASU 2015-05 is effective for interim and annual reporting periods beginning after December 15, 2015. The Company is currently assessing the impact of adopting this standard on the Company’s financial position, results of operations, cash flows and financial statement disclosures. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis . ASU 2015- 02 amends certain aspects of the consolidation guidance in U.S. GAAP. In particular, it will modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities and also eliminates the presumption that a general partner should consolidate a limited partnership. The new guidance will also affect the consolidation analysis of the Company’s interests in VIEs, particularly those that have fee arrangements and related party relationships. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015 and retrospective adoption is required either through a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the year of adoption or retrospectively for all comparative periods. Early adoption is permitted. The Company is currently assessing the impact of adopting this standard on the Company’s financial position, results of operations, cash flows and financial statement disclosures. In January 2015, the FASB issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items . This Update eliminates from GAAP the concept of extraordinary items. The amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The Company does not expect the adoption of ASU 2015-01 to have material impact of adopting this standard on the Company’s financial statements. In June 2014, the FASB issued ASU No. 2014-12 Compensation-Stock Compensation (Topic 718), Accounting for Share Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period . A performance target in a share-based payment that affects vesting and that could be achieved after the requisite service period should be accounted for as a performance condition under Accounting Standards Codification (ASC) 718, Compensation-Stock Compensation. As a result, the target is not reflected in the estimation of the award’s grant date fair value. Compensation cost would be recognized over the required service period, if it is probable that the performance condition will be achieved. The guidance is effective for annual periods beginning after December 15, 2015 and interim periods within those annual periods. Early adoption is permitted. The Company is currently assessing the impact of adopting this standard on the Company’s financial position, results of operations, cash flows and financial statement disclosures. In May 2014, the FASB issued ASU No. 2014-9, Revenue from Contracts with Customers . The amendments in ASU No. 2014-9 create Topic 606, Revenue from Contracts with Customers , and supersede the revenue recognition requirements in Topic 605, Revenue Recognition , including most industry specific revenue recognition guidance. In addition, the amendments supersede the cost guidance in Subtopic 605-35, Revenue Recognition—Construction-Type and Production-Type Contract , and create a new Subtopic 340-40, Other Assets and Deferred Costs—Contracts with Customers . The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The amendments are effective for fiscal years and interim periods within those fiscal years beginning on or after December 15, 2017. Early adoption is not permitted. The Company is currently assessing the impact on the Company's financial position, results of operations, cash flows and financial statement disclosures.

Net Income per Common Share (Ta

Net Income per Common Share (Tables)	12 Months Ended
	Dec. 31, 2015
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 basic weighted average common shares outstanding to diluted weighted average common shares outstanding is as follows: Year Ended December 31, (millions, except share and per share data) 2015 2014 2013 Net income attributable to SP Plus Corporation $ 17.4 $ 23.1 $ 12.1 Basic weighted average common shares outstanding 22,189,140 22,009,800 21,902,870 Dilutive impact of share-based awards 322,619 397,543 346,714 Diluted weighted average common shares outstanding 22,511,759 22,407,343 22,249,584 Net income per common share Basic $ 0.78 $ 1.05 $ 0.55 Diluted $ 0.77 $ 1.03 $ 0.54

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of the transactions pursuant to the stock option plans	A summary of the status of the stock option plans as of December 31, 2015 , and changes during the years ended December 31, 2015 , 2014 and 2013 , are presented below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at December 31, 2012 7,101 $ 5.75 Granted — n/a Exercised — n/a Expired — n/a Outstanding at December 31, 2013 7,101 $ 5.75 Granted — n/a Exercised — n/a Expired — n/a Outstanding at December 31, 2014 7,101 $ 5.75 Granted — n/a Exercised (7,101 ) 5.75 Expired — n/a Vested and Exercisable at December 31, 2015 — $ — — $ —
Summary of the status of the restricted stock units and changes during the period	A summary of the status of the restricted stock units as of December 31, 2015 , and changes during the year ended December 31, 2015 , 2014 and 2013 , are presented below: Shares Weighted Nonvested at December 31, 2012 723,425 $ 19.78 Issued 72,291 20.40 Vested (90,965 ) 21.84 Forfeited — n/a Nonvested at December 31, 2013 704,751 $ 20.00 Issued 31,099 22.20 Vested (145,421 ) 22.41 Forfeited (34,729 ) 23.88 Nonvested at December 31, 2014 555,700 $ 19.57 Issued 12,589 23.65 Vested (150,073 ) 20.77 Forfeited (16,500 ) 19.45 Nonvested at December 31, 2015 401,716 $ 19.25
Summary of the status of the performance stock units and changes during the period	A summary of the status of the performance share units as of December 31, 2015 , and changes during the year ended December 31, 2015 and 2014 are presented below: Shares Weighted Nonvested at December 31, 2013 — n/a Issued 89,117 18.96 Vested (9,687 ) 18.96 Forfeited — n/a Nonvested at December 31, 2014 79,430 18.96 Issued 125,392 21.64 Vested (6,915 ) 19.91 Forfeited (24,056 ) 20.60 Nonvested at December 31, 2015 173,851 $ 20.63

Leasehold Improvements, Equip33

Leasehold Improvements, Equipment, Land and Construction in Progress, net (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Summary of leasehold improvements, equipment, and construction in progress and related accumulated depreciation and amortization	Leasehold improvements, equipment, and construction in progress and related accumulated depreciation and amortization is as follows: December 31 (millions) Ranges of Estimated Useful Life 2015 2014 Equipment 2 - 10 Years $ 34.5 $ 33.6 Software 3 - 10 Years 27.0 24.1 Vehicles 4 Years 8.7 8.6 Other 10 Years 0.4 0.3 Leasehold improvements Shorter of lease term or economic life up to 10 years 20.2 20.4 Construction in progress 3.6 2.1 94.4 89.1 Less accumulated depreciation and amortization (59.8 ) (47.6 ) 34.6 41.5 Land — 1.3 Leasehold improvements, equipment, land and construction in progress, net $ 34.6 $ 42.8

Cost of Contracts, net (Tables)

Cost of Contracts, net (Tables)	12 Months Ended
	Dec. 31, 2015
Other Deferred Costs, Net [Abstract]
Schedule of cost of contracts, net	Cost of contracts, net is comprised of the following: December 31, (millions) 2015 2014 Cost of contracts $ 31.3 $ 28.3 Accumulated amortization (19.4 ) (17.8 ) Cost of contracts, net $ 11.9 $ 10.5
Schedule of expected future amortization of cost of contracts	The expected future amortization of cost of contracts is as follows: (millions) Cost of 2016 $ 3.2 2017 3.0 2018 2.5 2019 1.6 2020 0.6 2021 and Thereafter 1.0 Total $ 11.9

Other Intangible Assets, Net (T

Other Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of intangible assets, net	The following presents a summary of other intangible assets: December 31, 2015 2014 (millions) Weighted Acquired Accumulated Acquired Acquired Accumulated Acquired Covenant not to compete 3.0 $ 0.9 $ (0.9 ) $ — $ 0.9 $ (0.9 ) $ — Trade names and trademarks 1.1 9.8 (7.8 ) 2.0 9.8 (5.5 ) 4.3 Proprietary know how 1.3 34.7 (25.0 ) 9.7 34.7 (17.4 ) 17.3 Management contract rights 12.8 81.0 (16.8 ) 64.2 81.0 (11.6 ) 69.4 Acquired intangible assets, net (2) 11.1 $ 126.4 $ (50.5 ) $ 75.9 $ 126.4 $ (35.4 ) $ 91.0 (1) Excludes the original cost and accumulated amortization on fully amortized intangible assets. (2) Intangible assets have estimated remaining lives between one and 16 years.
Schedule of expected future amortization of intangible assets	The expected future amortization of intangible assets as of December 31, 2015 is as follows: (millions) Intangible asset 2016 $ 14.6 2017 7.2 2018 5.3 2019 5.2 2020 5.2 2021 and Thereafter 38.4 Total $ 75.9

Favorable and Unfavorable Acq36

Favorable and Unfavorable Acquired Lease Contracts, net (Tables)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Schedule of favorable and unfavorable lease contracts	The following presents a summary of favorable and unfavorable lease contracts: Favorable (Unfavorable) December 31, December 31, (millions) 2015 2014 2015 2014 Acquired fair value of lease contracts $ 74.0 $ 77.0 $ (88.2 ) $ (90.1 ) Accumulated (amortization) accretion (35.9 ) (28.7 ) 37.9 28.7 Total acquired fair value of lease contracts, net $ 38.1 $ 48.3 $ (50.3 ) $ (61.4 )
Schedule of expected future amortization (accretion) of lease contract rights	The expected future amortization (accretion) of lease contract rights is as follows: (millions) Favorable (Unfavorable) Favorable / 2016 $ 8.2 $ (10.1 ) $ (1.9 ) 2017 6.4 (9.0 ) (2.6 ) 2018 4.0 (7.3 ) (3.3 ) 2019 3.6 (4.8 ) (1.2 ) 2020 3.1 (3.7 ) (0.6 ) 2021 and Thereafter 12.8 (15.4 ) (2.6 ) Total $ 38.1 $ (50.3 ) $ (12.2 )

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of amounts for goodwill and changes to carrying value by operating segment	The amounts for goodwill and changes to carrying value by reportable segment are as follows: (millions) Region Region Region Region Region Total Balance as of December 31, 2013 $ 163.8 $ 143.8 $ 37.0 $ 62.6 $ 32.2 $ 439.4 Goodwill acquired — — — 0.2 — 0.2 Foreign currency translation (0.5 ) — — — (0.5 ) Disposals (1) (2.1 ) (2.3 ) (0.6 ) (0.1 ) (1.1 ) (6.2 ) Balance as of December 31, 2014 $ 161.2 $ 141.5 $ 36.4 $ 62.7 $ 31.1 $ 432.9 Foreign currency translation (0.7 ) — — — — (0.7 ) Disposals (2) — (0.9 ) — — — (0.9 ) Balance as of December 31, 2015 $ 160.5 $ 140.6 $ 36.4 $ 62.7 $ 31.1 $ 431.3 (1) In October 2014, the Company contributed all of the assets and liabilities of its proprietary Click and Park parking prepayment business in exchange for a 30 percent interest in the newly formed legal entity called Parkmobile, LLC. The contribution of the Click and Park business to the joint venture resulted in a loss of control of the subsidiary and therefore it was deconsolidated from the Company's financial statements. As a result of the deconsolidation, the Company was required to allocate $6.2 million of goodwill to the net carrying amount of the subsidiary's net assets contributed to the Parkmobile joint venture. The pro-rata allocation on the disposal of goodwill at the operating segment level was based on a relative fair value approach. (2) In August 2015, certain assets, which met the definition of a business, were sold to a third-party in an arms-length transaction (see also Note 1. Significant Accounting Policies and Practices and Note 10. Fair Value for further detail on the sale of the business). The sale resulted in the disposal of specifically identifiable goodwill associated with the business of $0.9 million from Region Two.

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities measured at fair value on a recurring basis and basis of measurement	The following table sets forth the Company's financial assets and liabilities measured at fair value on a recurring basis and the basis of measurement at December 31, 2015 and 2014 : Fair Value at Fair Value at (millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets Prepaid expenses and other Contingent consideration receivable $ — $ — $ 0.5 $ — $ — $ — Interest rate swap — 0.2 — — 0.6 — Total $ — $ 0.2 $ 0.5 $ — $ 0.6 $ — Liabilities Accrued expenses Contingent consideration obligation $ — $ — $ — $ — $ — $ 0.1 Other long term liabilities Contingent consideration obligation — — — — — 0.2 Total $ — $ — — $ — — $ 0.3
Schedule of reconciliation of the beginning and ending balances for liabilities measured at fair value using significant unobservable inputs (level 3)	The following table provides a reconciliation of the beginning and ending balances for the contingent consideration obligation measured at fair value using significant unobservable inputs (Level 3): (millions) Due to Seller Balance at December 31, 2012 $ (3.3 ) Increase related to new acquisitions — Payment of contingent consideration 0.9 Change in fair value 0.9 Balance at December 31, 2013 (1.5 ) Increase related to new acquisitions — Payment of contingent consideration 1.8 Change in fair value (0.5 ) Balance at December 31, 2014 (0.3 ) Increase related to new acquisitions — Payment of contingent consideration 0.1 Change in fair value 0.2 Balance at December 31, 2015 $ — Note: Amounts may not foot due to rounding.
Schedule of carrying and estimated fair values of the Company's financial instruments	The following table presents the carrying amounts and estimated fair values of financial instruments not measured at fair value in the Consolidated Balance Sheet at December 31, 2015 and 2014 : 2015 2014 (millions) Carrying Fair Carrying Fair Cash and cash equivalents $ 18.7 $ 18.7 $ 18.2 $ 18.2 Long-term borrowings Senior credit facility, net of original discount on borrowings and deferred financing costs 223.1 223.1 248.4 248.4 Other obligations $ 2.0 $ 2.0 $ 2.4 $ 2.4

Borrowing Arrangements (Tables)

Borrowing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of long-term borrowings	Long-term borrowings, in order of preference, consisted of the following: Amount Outstanding December 31, (millions) Maturity Date 2015 2014 Senior credit facility, net of original discount on borrowings and deferred financing costs (1) / (2) $ 223.1 $ 248.4 Other borrowings Various 2.0 2.4 Total obligations under credit facility and other borrowings 225.1 250.8 Less: Current portion of obligations under credit facility and other borrowings 15.2 14.5 Total long-term obligations under credit facility and other borrowings $ 209.9 $ 236.3 (1) Credit Agreement was due to mature October 2, 2017 (2) Restated Credit Agreement matures on February 20, 2020.
Aggregate minimum principal maturities of long-term debt	Aggregate minimum principal maturities of long-term borrowings for the fiscal years following December 31, 2015 , are as follows: (millions) 2016 $ 16.5 2017 20.4 2018 20.1 2019 20.0 2020 152.3 Thereafter — Total debt 229.3 Less: Current portion, including debt discount 15.2 Less: Original discount on borrowings 1.8 Less: Deferred financing costs 2.4 Total long-term portion, obligations under credit facility and other borrowings $ 209.9

Leases and Contingencies (Table

Leases and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of minimum rental commitments, excluding contingent rent provisions and sublease income under all non-cancelable operating leases	At December 31, 2015 , the Company's minimum rental commitments, excluding contingent rent provisions and sublease income under all non-cancellable operating leases, are as follows: (millions) 2016 $ 222.0 2017 190.6 2018 158.7 2019 137.2 2020 70.4 2021 and thereafter 206.2 Total $ 985.1 (1) $18.6 is included in 2016 minimum commitments for leases that expire in less than one year.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of components income before income taxes	For financial reporting purposes, earnings before income taxes includes the following components: Year Ended December 31, (millions) 2015 2014 2013 United States $ 21.7 $ 23.5 $ 21.4 Foreign 3.4 2.4 2.2 Total $ 25.1 $ 25.9 $ 23.6
Schedule of components of income tax expense (benefit)	The components of income tax expense (benefit) are as follows: Year Ended December 31, (millions) 2015 2014 2013 Current provision U.S. federal $ 11.5 $ 9.5 $ 3.2 Foreign 1.2 0.8 0.7 State 1.8 1.6 2.2 Total current 14.5 11.9 6.1 Deferred provision U.S. federal (4.9 ) (1.5 ) 2.3 Foreign 0.1 0.1 (0.1 ) State (4.9 ) (10.7 ) 0.5 Total deferred (9.7 ) (12.1 ) 2.7 Income tax expense (benefit) $ 4.8 $ (0.2 ) $ 8.8
Schedule of significant components of the Company's deferred tax assets and liabilities	Significant components of the Company's deferred tax assets and liabilities are as follows: December 31, (millions) 2015 2014 Deferred tax assets Net operating loss carry forwards $ 20.6 $ 22.0 Accrued expenses 34.1 34.3 Accrued compensation 12.1 12.0 Book over tax cost unfavorable acquired lease contracts 20.6 25.2 Other 0.7 0.4 Total gross deferred tax assets 88.1 93.9 Less: valuation allowance (6.8 ) (12.3 ) Total deferred tax assets 81.3 81.6 Deferred tax liabilities Prepaid expenses (0.4 ) (0.6 ) Undistributed foreign earnings (1.0 ) (0.8 ) Tax over book depreciation and amortization (11.0 ) (16.7 ) Tax over book goodwill amortization (28.7 ) (28.7 ) Tax over book cost favorable acquired lease contracts (15.6 ) (19.8 ) Equity investments in unconsolidated entities (8.8 ) (9.2 ) Other (0.1 ) (0.7 ) Total deferred tax liabilities (65.6 ) (76.5 ) Net deferred tax asset $ 15.7 $ 5.1 Amounts recognized on the balance sheet consist of: December 31, (millions) 2015 2014 Deferred tax asset, current $ 12.3 $ 10.9 Other assets, net / Deferred tax (liability) 3.4 (5.8 ) Net deferred tax asset $ 15.7 $ 5.1
Schedule of reconciliation of the Company's reported income tax provision (benefit) to the amount computed by multiplying book income/(loss) before income taxes by the statutory United States federal income tax rate	A reconciliation of the Company's reported income tax provision (benefit) to the amount computed by multiplying book income before income taxes by the statutory United States federal income tax rate is as follows: Year Ended December 31, (millions) 2015 2014 2013 Tax at statutory rate $ 8.8 $ 9.1 $ 8.3 Permanent differences 1.4 1.0 0.8 State taxes, net of federal benefit 0.3 0.8 1.4 Effect of foreign tax rates (0.1 ) — — Minority interest (1.0 ) (1.1 ) (0.9 ) Equity investments in unconsolidated entities — 2.4 — Current year adjustment to deferred taxes 1.5 (1.3 ) 4.0 Recognition of tax credits (1.2 ) (1.5 ) (1.7 ) Other 0.6 (0.5 ) 0.9 10.3 8.9 12.8 Change in valuation allowance (5.5 ) (9.1 ) (4.0 ) Income tax (benefit) expense $ 4.8 $ (0.2 ) $ 8.8
Schedule of tax years that remain subject to examination for the Company's major tax jurisdictions	The tax years that remain subject to examination for the Company's major tax jurisdictions as of December 31, 2015 are shown below: 2011 - 2015 United States—federal income tax 2007 - 2015 United States—state and local income tax 2012 - 2015 Foreign—Canada and Puerto Rico

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of participation in multiemployer defined benefit pension plans	The " Expiration Date of Collective Bargaining Agreement " column lists the expiration dates of the agreements to which the plans are subject. EIN/ Pension Protection FIP/FR Contributions (millions) Zone Expiration Pension 2015 2014 2013 2015 2014 2013 Surcharge Teamsters Local Union 727 36-61023973 Green Green Green N/A $ 3.5 $ 3.3 $ 3.4 No 2015 10/31/2016 Local 272 Labor Management 13-5673836 Green N/A Green N/A $ 2.2 $ 2.0 $ 2.4 No 2015 3/5/2021 Local 911 (Los Angeles Airport) 216271 Green N/A N/A N/A $ 2.2 $ — $ — No 2015 6/30/2016

Bradley Agreement (Tables)

Bradley Agreement (Tables)	12 Months Ended
	Dec. 31, 2015
Contractors [Abstract]
Schedule of deficiency payments made, net of reimbursements	The total deficiency payments, net of reimbursements, as of December 31, 2015 and 2014 are as follows: December 31, (millions) 2015 2014 Balance at beginning of year $ 13.3 $ 14.6 Deficiency payments made 0.1 — Deficiency repayment received (1.8 ) (1.3 ) Balance at end of year $ 11.6 $ 13.3

Accumulated Other Comprehensi44

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Components of accumulated other comprehensive income (loss), net of tax	The components of changes in accumulated comprehensive income (loss), net of taxes, were as follows: (millions) Foreign Effective Portion Total Balance as of December 31, 2012 $ 0.1 $ (0.5 ) $ (0.4 ) Change in other comprehensive income (loss) (0.5 ) 1.0 0.5 Balance as of December 31, 2013 (0.4 ) 0.5 0.1 Change in other comprehensive income (loss) (0.2 ) (0.2 ) (0.3 ) Balance as of December 31, 2014 (0.5 ) 0.3 (0.2 ) Change in other comprehensive income (loss) (0.7 ) (0.2 ) (0.9 ) Balance as of December 31, 2015 $ (1.2 ) $ 0.1 $ (1.1 ) Note: Amounts may not foot due to rounding.

Domestic and Foreign Operatio45

Domestic and Foreign Operations (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 , 2014 and 2013 : Year Ended December 31, (millions) 2015 Gross 2014 Gross Margin 2013 Gross Parking services revenue (a) Region One Lease contracts $ 208.1 $ 206.0 $ 199.1 Management contracts 84.7 84.0 95.3 Total Region One 292.8 290.0 294.4 Region Two Lease contracts 125.7 119.9 124.0 Management contracts 79.6 83.2 87.0 Total Region Two 205.3 203.1 211.0 Region Three Lease contracts 108.8 117.8 120.6 Management contracts 27.8 25.8 23.4 Total Region Three 136.6 143.6 144.0 Region Four Lease contracts 123.8 48.5 43.7 Management contracts 100.6 103.3 96.6 Total Region Four 224.4 151.8 140.3 Region Five Lease contracts 4.4 2.7 2.6 Management contracts 43.8 29.8 33.7 Total Region Five 48.2 32.5 36.3 Other Lease contracts — 1.7 (0.4 ) Management contracts 13.9 12.2 11.3 Total Other 13.9 13.9 10.9 Reimbursed management contract revenue 694.7 679.8 629.9 Total revenues $ 1,615.9 $ 1,514.7 $ 1,466.8 Gross Profit Region One Lease contracts 12.5 6 % 12.4 6 % $ 10.6 5 % Management contracts 38.0 45 % 36.0 43 % 42.8 45 % Total Region One 50.5 48.4 53.4 Year Ended December 31, (millions) 2015 Gross 2014 Gross Margin 2013 Gross Region Two Lease contracts 21.1 17 % 19.8 17 % 18.9 15 % Management contracts 32.9 41 % 35.8 43 % 38.8 45 % Total Region Two 54.0 55.6 57.7 Region Three Lease contracts 2.2 2 % 4.7 4 % (0.1 ) — % Management contracts 14.2 51 % 14.3 55 % 12.6 54 % Total Region Three 16.4 19.0 12.5 Region Four Lease contracts 5.5 4 % 3.6 7 % 3.2 7 % Management contracts 24.5 24 % 26.4 26 % 24.6 25 % Total Region Four 30.0 30.0 27.8 Region Five Lease contracts 0.3 7 % 0.2 8 % — (2 )% Management contracts 11.4 26 % 11.7 39 % 11.3 34 % Total Region Five 11.7 11.9 11.3 Other Lease contracts (3.5 ) N/A 0.2 N/A 0.9 N/A Management contracts 11.0 N/A 6.2 N/A 8.5 N/A Total Other 7.5 6.4 9.4 Total gross profit 170.1 171.3 172.1 General and administrative expenses 97.3 101.5 98.9 General and administrative 57 % 59 % 57 % Depreciation and amortization 34.0 30.3 31.2 Operating income 38.8 39.5 42.0 Other expenses (income): Interest expense 12.7 17.8 19.0 Interest income (0.2 ) (0.4 ) (0.6 ) Gain on sale of business (0.5 ) — — Gain on contribution of a — (4.1 ) — Equity in losses from 1.7 0.3 — 13.7 13.6 18.4 Income before income taxes 25.1 25.9 23.6 Income tax (benefit) expense 4.8 (0.2 ) 8.8 Net income 20.3 26.1 14.8 Less: Net income attributable 2.9 3.0 2.7 Net income attributable $ 17.4 $ 23.1 $ 12.1

Unaudited Quarterly Results (Ta

Unaudited Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of unaudited quarterly results	The operating results for any historical quarter are not necessarily indicative of results for any future period. 2015 2014 (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 $ 135.8 $ 146.4 $ 146.6 $ 142.1 $ 116.6 $ 125.0 $ 129.0 $ 126.0 Management contracts 94.1 88.3 85.8 82.1 90.0 84.9 77.9 85.5 Reimbursed management contract revenue 174.3 170.9 168.3 181.2 169.2 164.5 173.4 172.7 Total revenue 404.2 405.6 400.7 405.4 375.8 374.4 380.3 384.2 Cost of parking services Lease contracts 128.7 134.5 136.0 133.6 112.1 112.0 116.5 115.1 Management contracts 60.0 53.8 53.6 50.9 59.2 50.0 46.8 51.9 Reimbursed management contract expense 174.3 170.9 168.3 181.2 169.2 164.5 173.4 172.7 Total cost of parking services 363.0 359.2 357.9 365.7 340.5 326.5 336.7 339.7 Gross profit Lease contracts 7.1 11.9 10.6 8.5 4.5 13.0 12.5 10.9 Management contracts 34.1 34.5 32.2 31.2 30.8 34.9 31.1 33.6 Total gross profit 41.2 46.4 42.8 39.7 35.3 47.9 43.6 44.5 General and administrative expenses 25.7 24.7 23.8 23.1 26.1 25.0 24.1 26.3 Depreciation and amortization 7.9 8.2 8.2 9.7 7.2 7.7 7.6 7.8 Operating income 7.6 13.5 10.8 6.9 2.0 15.2 11.9 10.4 Other expense (income) Interest expense 4.0 3.0 3.0 2.7 4.8 4.8 4.2 4.0 Interest income (0.1 ) — — (0.1 ) (0.1 ) (0.1 ) (0.1 ) (0.1 ) Gain on sale of business — — (0.5 ) — — — — — Gain on contribution of a business to an unconsolidated entity — — — — — — — (4.1 ) Equity in losses from investment in unconsolidated entity 0.5 0.3 0.4 0.5 — — — 0.3 Total other expenses (income) 4.4 3.3 2.9 3.1 4.7 4.7 4.1 0.1 Earnings (loss) before income taxes 3.2 10.2 7.9 3.8 (2.7 ) 10.5 7.8 10.3 Income tax expense (benefit) 1.3 (0.4 ) 3.5 0.4 (7.4 ) 4.2 2.8 0.2 Net income 1.9 10.6 4.4 3.4 4.7 6.3 5.0 10.1 Less: Net income attributable to noncontrolling interest 0.5 0.8 0.8 0.8 0.5 0.9 0.8 0.8 Net income attributable to SP Plus Corporation $ 1.4 $ 9.8 $ 3.6 $ 2.6 $ 4.2 $ 5.4 $ 4.2 $ 9.3 Common stock data Net income per share Basic $ 0.06 $ 0.44 $ 0.17 $ 0.11 $ 0.20 $ 0.24 $ 0.20 $ 0.42 Diluted $ 0.06 $ 0.43 $ 0.16 $ 0.11 $ 0.19 $ 0.24 $ 0.19 $ 0.41 Weighted average shares outstanding Basic 22,127,725 22,145,190 22,205,707 22,276,763 21,977,836 21,991,965 21,997,394 22,071,706 Diluted 22,528,608 22,521,832 22,548,166 22,486,888 22,351,845 22,398,886 22,426,787 22,451,557

Significant Accounting Polici47

Significant Accounting Policies and Practices (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2014USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)voting_interest_model_entityvariable_interest_entitypartnership	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Oct. 31, 2012USD ($)
Cash and Cash Equivalents
Restricted Cash and Cash Equivalents			$ 900,000	$ 500,000
Allowance for Doubtful Accounts
Allowance for Doubtful Accounts			$ 900,000	1,000,000
Goodwill and Other Intangibles
Forecasted period for income statement and working capital projections to assess goodwill impairment			5 years
Debt Issuance Costs
Debt issuance costs			$ 2,400,000	2,600,000
Accumulated amortization of debt issuance costs			8,200,000	7,300,000
Amortization expense			900,000	1,300,000	$ 1,500,000
Financial Instruments
Book overdrafts			25,800,000	30,800,000
Advertising Costs
Advertising expenses			1,600,000	1,300,000	1,000,000
Equity investment in unconsolidated subsidiaries.
Equity earnings in related investments			2,000,000	1,900,000	2,100,000
Ownership percentage	30.00%
Recognition of pre-tax gain	$ 4,100,000
Sale of Business
Cash received from sale of business, net			$ 1,000,000	0	0
Discontinued Operations, Disposed of by Sale | Security Business
Sale of Business
Sale price of business		$ 1,800,000
Gain on sale of business		500,000
Cash received from sale of business, net		$ 1,000,000
Period of cash consideration to be received		18 months
Contingent consideration receivable from sale of business		$ 500,000
Minimum
Equity investment in unconsolidated subsidiaries.
Voting interest ownership percentage			30.00%
Maximum
Equity investment in unconsolidated subsidiaries.
Voting interest ownership percentage			50.00%
Equipment | Minimum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life			2 years
Equipment | Maximum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life			10 years
Leasehold improvements | Maximum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life			10 years
Leasehold improvements | Average
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life			8 years 2 months 12 days
Partnerships and joint ventures
Equity investment in unconsolidated subsidiaries.
Number of ownership interest entities | partnership			38
VIEs
Equity investment in unconsolidated subsidiaries.
Number of ownership interest entities | variable_interest_entity			27
Voting interest model entities
Equity investment in unconsolidated subsidiaries.
Number of ownership interest entities | voting_interest_model_entity			11
General Liability
Insurance Reserves
Liability insurance policies, maximum deductibles or a self-insured retention limit			$ 500,000
Garage Liability Or Automobile Liability
Insurance Reserves
Liability insurance policies, maximum deductibles or a self-insured retention limit			500,000
Workers' compensation and garagekeepers legal liability
Insurance Reserves
Liability insurance policies, maximum deductibles or a self-insured retention limit			$ 300,000
Interest rate swaps | Cash flow hedges
Interest rate swaps
Aggregate starting notional amount						$ 150,000,000
Fixed rate (as a percent)						0.7525%
Variable rate basis			LIBOR
Ineffective portion of cash flow hedges recognized			$ 0
Central Merger
Significant Accounting Policies [Line Items]
Cost of Property Repairs and Maintenance			4,600,000	$ 1,300,000	$ 0
Legal and Other Contingencies
Structural and repair costs incurred			$ 1,500,000
Indemnification of cost pursuant to merger agreement			80.00%

Acquisition (Details)

Acquisition (Details) - USD ($)	Feb. 19, 2016	Sep. 21, 2015	Apr. 30, 2015	Oct. 02, 2012	Sep. 30, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2014
Business Acquisition [Line Items]
Interest acquired (as a percent)									30.00%
Expense of net debt working capital disallowed						$ 1,600,000
Expense disallowed under net debt working capital, net of tax						900,000
Acquisition and integration related costs included in depreciation and amortization expense						34,100,000	$ 30,400,000	$ 29,500,000
Central Merger
Business Acquisition [Line Items]
Interest acquired (as a percent)				100.00%
Common stock issued (in shares)				6,161,332
Assumption of debt, net of cash acquired				$ 217,700,000
Cash consideration payable in three years from the acquisition date, pursuant to the Merger Agreement and prior to Central Net Debt Working Capital				27,000,000	$ 27,000,000
Maximum Net Debt Working Capital Threshold				$ 275,000,000
Period after which contingent cash consideration to be paid				3 years
Threshold of Net Debt Working Capital, pursuant to the Merger Agreement					$ (285,000,000)
Price of share at which former stockholders of acquiree can elect to pay applicable amount (in dollars per share)					$ 23.64
Minimum cash consideration to cover capped indemnities (greater than)					$ 17,000,000
Net Debt Working Capital as defined in the Merger Agreement					(296,300,000)
Estimated amount for structural and repair cost with respect to indemnification claims						$ 1,200,000
Percentage of indemnification of cost pursuant to merger agreement						80.00%
Total amount before estimation of additional indemnification claims						$ 1,500,000
Net debt working capital above the upper threshold amount						6,600,000
Expense of net debt working capital disallowed						1,600,000
Expense disallowed under net debt working capital, net of tax						900,000
Amount in excess of upper threshold					11,300,000
Business Combination, Contingent Consideration, Indemnity Claims					23,400,000
Payment for adverse consequences not limited to structural and repair cost						18,800,000
Acquisition and integration related costs included in general and administrative expenses						6,200,000	8,500,000	10,900,000
Acquisition and integration related costs included in depreciation and amortization expense						1,000,000	$ 0	$ 0
General and administrative expense recognized						$ 1,600,000
April 30, 2015 | Central Merger
Business Acquisition [Line Items]
Net Debt Working Capital as defined in the Merger Agreement					(270,800,000)
Net debt working capital below lower threshold			$ 4,200,000
September 21, 2015 | Central Merger
Business Acquisition [Line Items]
Net Debt Working Capital as defined in the Merger Agreement					(278,000,000)
Net debt working capital above lower threshold		$ 3,000,000
October 1, 2015 | Central Merger
Business Acquisition [Line Items]
Net Debt Working Capital as defined in the Merger Agreement					(11,300,000)
February 19, 2016 | Central Merger
Business Acquisition [Line Items]
Net Debt Working Capital as defined in the Merger Agreement					(291,600,000)
Amount in excess of upper threshold					$ 6,600,000
Subsequent Event | Central Merger
Business Acquisition [Line Items]
Indemnification claims for Net Debt Working Capital and certain defined adverse consequences not recognized due to the contingent nature of these claims	$ 1,500,000
Business Combination, Contingent Consideration, Indemnity Claims	24,900,000
Net Debt Working Capital Allowable Claims	1,500,000
Additional amount disallowed determined by independent public accounting firm	1,600,000
Additional indemnification claims with respect to structural and repair costs	$ 6,100,000

Net Income per Common Share (De

Net Income per Common Share (Details) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)$ / sharesshares	Sep. 30, 2015USD ($)$ / sharesshares	Jun. 30, 2015USD ($)$ / sharesshares	Mar. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Sep. 30, 2014USD ($)$ / sharesshares	Jun. 30, 2014USD ($)$ / sharesshares	Mar. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)incentive_program$ / sharesshares
Earnings Per Share [Abstract]
Net income attributable to SP Plus Corporation | $	$ 2.6	$ 3.6	$ 9.8	$ 1.4	$ 9.3	$ 4.2	$ 5.4	$ 4.2	$ 17.4	$ 23.1	$ 12.1
Basic (in shares)	22,276,763	22,205,707	22,145,190	22,127,725	22,071,706	21,997,394	21,991,965	21,977,836	22,189,140	22,009,800	21,902,870
Dilutive impact of share-based awards (in shares)									300,000	400,000	300,000
Diluted (in shares)	22,486,888	22,548,166	22,521,832	22,528,608	22,451,557	22,426,787	22,398,886	22,351,845	22,511,759	22,407,343	22,249,584
Net income per common share
Basic (in dollars per share) | $ / shares	$ 0.11	$ 0.17	$ 0.44	$ 0.06	$ 0.42	$ 0.20	$ 0.24	$ 0.20	$ 0.78	$ 1.05	$ 0.55
Diluted (in dollars per share) | $ / shares	$ 0.11	$ 0.16	$ 0.43	$ 0.06	$ 0.41	$ 0.19	$ 0.24	$ 0.19	$ 0.77	$ 1.03	$ 0.54
Performance-based incentive programs | incentive_program											0
Antidilutive securities excluded from computation of earnings per share, amount									0	0	0

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Rollforward (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Granted (in shares)		0	0
Expired (in shares)	0	0	0
Weighted Average Remaining Contractual Term
Vested (in years)	0 years
Employee Stock Option
Number of Shares
Outstanding at the beginning of the period (in shares)	7,101	7,101	7,101
Granted (in shares)	0	0	0
Exercised (in shares)	(7,101)	0	0
Outstanding at the end of the period (in shares)	0	7,101	7,101
Options exercisable at the end of the period (in shares)	0
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 5.75	$ 5.75	$ 5.75
Exercised (in dollars per share)	5.75
Outstanding at the end of the period (in dollars per share)	0	$ 5.75	$ 5.75
Options exercisable at the end of the period (in dollars per share)	$ 0
Weighted Average Remaining Contractual Term
Exercisable (in years)	0 years
Aggregate Intrinsic Value
Vested	$ 0
Exercisable	$ 0

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Units Rollforward (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units
Nonvested Shares
Nonvested at the beginning of the period (in shares)	555,700	704,751	723,425
Issued (in shares)	12,589	31,099	72,291
Vested (in shares)	(150,073)	(145,421)	(90,965)
Forfeited (in shares)	(16,500)	(34,729)	0
Nonvested at the end of the period (in shares)	401,716	555,700	704,751
Weighted Average Grant-Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 19.57	$ 20	$ 19.78
Issued (in dollars per share)	23.65	22.20	20.40
Vested (in dollars per share)	20.77	22.41	21.84
Forfeited (in dollars per share)	19.45	23.88
Nonvested at the end of the period (in dollars per share)	$ 19.25	$ 19.57	$ 20
Performance Shares
Nonvested Shares
Nonvested at the beginning of the period (in shares)	79,430	0
Issued (in shares)	125,392	89,117
Vested (in shares)		(9,687)
Forfeited (in shares)	(24,056)	0
Nonvested at the end of the period (in shares)	173,851	79,430	0
Weighted Average Grant-Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 18.96
Issued (in dollars per share)	21.64	$ 18.96
Vested (in dollars per share)	19.91	18.96
Forfeited (in dollars per share)	20.60
Nonvested at the end of the period (in dollars per share)	$ 20.63	$ 18.96

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($)	Apr. 21, 2015	Apr. 22, 2014	Apr. 24, 2013	Apr. 22, 2008	Apr. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 13, 2013	Mar. 12, 2013	Feb. 27, 2008	Feb. 26, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							0	0
Stock-based compensation expense not recognized by employer							$ 0	$ 0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)						0	0	0
Intrinsic value of options exercised								$ 100,000
Unvested Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of nonvested stock options						0	0	0
Unrecognized compensation costs related to unvested options						$ 0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense						$ 1,600,000	$ 2,400,000	$ 3,800,000
Restricted stock units awarded (in shares)						12,589	31,099	72,291
Vesting period								3 years
Unrecognized stock-based compensation costs						$ 2,700,000	$ 4,400,000	$ 7,300,000
Vested (in shares)						(150,073)	(145,421)	(90,965)
Number of performance-based shares forfeited (in shares)						16,500	34,729	0
Weighted average remaining recognition period of unrecognized stock-based compensation costs						3 years 9 months 18 days	4 years	4 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense						$ 1,300,000	$ 300,000
Restricted stock units awarded (in shares)						125,392	89,117
Vesting period					3 years	3 years
Vested (in shares)							(9,687)
Number of performance-based shares forfeited (in shares)						24,056	0
Weighted average remaining recognition period of unrecognized stock-based compensation costs						1 year 7 months 6 days
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs related to unvested options						$ 5,400,000	$ 5,638,000
Long-term incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock available for awards before amendment										2,175,000		2,000,000
Maximum number of shares of common stock available for awards									2,975,000		2,175,000
Plan expiration period				20 years
Shares remaining available for awards						370,420
Granted (in shares)						0
Stock-based compensation expense not recognized by employer						$ 0
Long-term incentive plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Historical volatility period of common stock used to estimate the fair value of each option grant						90 days
Directors | Long-term incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested stock grants to directors (in shares)	32,357	19,336	21,949
Directors | Long-term incentive plan | Vested stock grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 700,000	$ 500,000	$ 500,000			$ 700,000	$ 500,000	$ 500,000
Executive Officer | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units awarded (in shares)						3,963	31,099	68,044
Vesting period						3 years	5 years	5 years
Additional restricted stock units authorized (in shares)								4,247
Executive Officer | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense						$ 100,000	$ 200,000
Vesting period						3 years	3 years
Vested (in shares)						(6,915)	(9,687)

Leasehold Improvements, Equip53

Leasehold Improvements, Equipment, Land and Construction in Progress, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 94.4	$ 89.1
Less accumulated depreciation and amortization	(59.8)	(47.6)
Leasehold improvements, equipment and construction in progress, net	34.6	41.5
Land	0	1.3
Leasehold improvements, equipment, land and construction in progress, net	34.6	42.8
Depreciation expense	15.9	12	$ 10.4
Proceeds from sale of equity interest in land	0	0	2.3
Gain on sale of equity interest in land	0	0	$ 1.2
Equipment
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 34.5	33.6
Equipment | Minimum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	2 years
Equipment | Maximum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	10 years
Software
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 27	24.1
Software | Minimum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	3 years
Software | Maximum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	10 years
Vehicles
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	4 years
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 8.7	8.6
Other
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	10 years
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 0.4	0.3
Leasehold improvements
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 20.2	20.4
Leasehold improvements | Maximum
Leasehold Improvements, Equipment, Land and Construction in Progress, net
Ranges of Estimated useful life	10 years
Construction in progress
Leasehold Improvements, Equipment, Land and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 3.6	$ 2.1

Cost of Contracts, net Cost of

Cost of Contracts, net Cost of Contracts, net - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Deferred Costs, Net [Abstract]
Cost of contracts	$ 31.3	$ 28.3
Accumulated amortization	(19.4)	(17.8)
Cost of contracts, net	$ 11.9	$ 10.5

Cost of Contracts, net - Future

Cost of Contracts, net - Future Amoritization and Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Expected future amortization of cost of contracts
2,016	$ 3.2
2,017	3
2,018	2.5
2,019	1.6
2,020	0.6
2021 and Thereafter	1
Cost of contracts, net	11.9	$ 10.5
Amortization expense, cost of contracts	$ 3.1	$ 3.2	$ 2.8
Weighted average useful life	9 years	9 years 6 months	9 years 7 months 6 days

Other Intangible Assets, Net -

Other Intangible Assets, Net - Summary of Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	11 years 1 month 6 days
Acquired Intangible Assets, Gross	$ 126.4	$ 126.4
Accumulated Amortization	(50.5)	(35.4)
Acquired Intangible Assets, Net	$ 75.9	91
Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	3 years
Acquired Intangible Assets, Gross	$ 0.9	0.9
Accumulated Amortization	(0.9)	(0.9)
Acquired Intangible Assets, Net	$ 0	0
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	1 year 1 month 6 days
Acquired Intangible Assets, Gross	$ 9.8	9.8
Accumulated Amortization	(7.8)	(5.5)
Acquired Intangible Assets, Net	$ 2	4.3
Proprietary know how
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	1 year 3 months 18 days
Acquired Intangible Assets, Gross	$ 34.7	34.7
Accumulated Amortization	(25)	(17.4)
Acquired Intangible Assets, Net	$ 9.7	17.3
Management contract rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	12 years 9 months 18 days
Acquired Intangible Assets, Gross	$ 81	81
Accumulated Amortization	(16.8)	(11.6)
Acquired Intangible Assets, Net	$ 64.2	$ 69.4
Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	16 years

Other Intangible Assets, Net 57

Other Intangible Assets, Net - Future Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 15.1	$ 15.2	$ 16.8
Expected future amortization of intangible assets
2,016	14.6
2,017	7.2
2,018	5.3
2,019	5.2
2,020	5.2
2021 and Thereafter	38.4
Acquired Intangible Assets, Net	$ 75.9	$ 91

Favorable and Unfavorable Acq58

Favorable and Unfavorable Acquired Lease Contracts, net - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Favorable
Acquired fair value of lease contracts	$ 126.4	$ 126.4
Accumulated Amortization	(50.5)	(35.4)
Acquired Intangible Assets, Net	75.9	91
Unfavorable
Acquired fair value of lease contracts	(88.2)	(90.1)
Accumulated (amortization ) accretion	37.9	28.7
Total acquired fair value of lease contracts, net	(50.3)	(61.4)
Favorable
Favorable
Acquired fair value of lease contracts	74	77
Accumulated Amortization	(35.9)	(28.7)
Acquired Intangible Assets, Net	$ 38.1	$ 48.3

Favorable and Unfavorable Acq59

Favorable and Unfavorable Acquired Lease Contracts, net - Future Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 15.1	$ 15.2	$ 16.8
Weighted Average Life (Years)	11 years 1 month 6 days
Expected future amortization of lease contract rights
2,016	$ 14.6
2,017	7.2
2,018	5.3
2,019	5.2
2,020	5.2
2021 and Thereafter	38.4
Acquired Intangible Assets, Net	75.9	91
Expected future (accretion) of lease contract rights
2,016	(10.1)
2,017	(9)
2,018	(7.3)
2,019	(4.8)
2,020	(3.7)
2021 and Thereafter	(15.4)
Total acquired fair value of lease contracts, net	(50.3)	$ (61.4)
Expected future amortization (accretion) of lease contract rights
2,016	(1.9)
2,017	(2.6)
2,018	(3.3)
2,019	(1.2)
2,020	(0.6)
2021 and Thereafter	(2.6)
Total	$ (12.2)
Favorable
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	11 years 1 month 6 days	10 years 9 months 18 days	10 years 1 month 6 days
Expected future amortization of lease contract rights
2,016	$ 8.2
2,017	6.4
2,018	4
2,019	3.6
2,020	3.1
2021 and Thereafter	12.8
Acquired Intangible Assets, Net	38.1	$ 48.3
(Unfavorable)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 0.9	$ 1	$ 4.3
Weighted Average Life (Years)	10 years 1 month 6 days	9 years 9 months 18 days	8 years 10 months 24 days

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Oct. 31, 2014
Changes in carrying amounts of goodwill
Balance at the beginning of the period		$ 432.9	$ 439.4
Goodwill acquired			0.2
Foreign currency translation		(0.7)	(0.5)
Disposals		(0.9)	(6.2)
Balance at the end of the period		431.3	432.9
Interest acquired (as a percent)				30.00%
Region Two
Changes in carrying amounts of goodwill
Disposals	$ 0.9
Operating segment | Region One
Changes in carrying amounts of goodwill
Balance at the beginning of the period		161.2	163.8
Goodwill acquired			0
Foreign currency translation		(0.7)	(0.5)
Disposals		0	(2.1)
Balance at the end of the period		160.5	161.2
Operating segment | Region Two
Changes in carrying amounts of goodwill
Balance at the beginning of the period		141.5	143.8
Goodwill acquired			0
Foreign currency translation		0	0
Disposals		(0.9)	(2.3)
Balance at the end of the period		140.6	141.5
Operating segment | Region Three
Changes in carrying amounts of goodwill
Balance at the beginning of the period		36.4	37
Goodwill acquired			$ 0
Foreign currency translation		0
Disposals		0	$ (0.6)
Balance at the end of the period		36.4	36.4
Operating segment | Region Four
Changes in carrying amounts of goodwill
Balance at the beginning of the period		62.7	62.6
Goodwill acquired			0.2
Foreign currency translation		0	0
Disposals		0	(0.1)
Balance at the end of the period		62.7	62.7
Operating segment | Region Five
Changes in carrying amounts of goodwill
Balance at the beginning of the period		31.1	32.2
Goodwill acquired			0
Foreign currency translation		0	0
Disposals		0	(1.1)
Balance at the end of the period		$ 31.1	$ 31.1

Goodwill - Additional Informat

Goodwill - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Forecasted period for income statement and working capital projections to assess goodwill impairment	5 years
Impairment loss as a result of goodwill	$ 0

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured on Recurring Basis (Details) - Recurring basis - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Level 1
Assets
Assets measured at fair value	$ 0	$ 0
Liabilities
Liabilities measured at fair value	0	0
Level 1 | Contingent acquisition consideration | Accrued expenses
Liabilities
Liabilities measured at fair value	0	0
Level 1 | Contingent acquisition consideration | Other long term liabilities
Liabilities
Liabilities measured at fair value	0	0
Level 2
Assets
Assets measured at fair value	0.2	0.6
Liabilities
Liabilities measured at fair value	0	0
Level 2 | Contingent acquisition consideration | Accrued expenses
Liabilities
Liabilities measured at fair value	0	0
Level 2 | Contingent acquisition consideration | Other long term liabilities
Liabilities
Liabilities measured at fair value	0	0
Level 3
Assets
Assets measured at fair value	0.5	0
Liabilities
Liabilities measured at fair value	0	0.3
Level 3 | Contingent acquisition consideration | Accrued expenses
Liabilities
Liabilities measured at fair value	0	0.1
Level 3 | Contingent acquisition consideration | Other long term liabilities
Liabilities
Liabilities measured at fair value	0	0.2
Interest rate swap | Level 1 | Prepaid expenses and other
Assets
Assets measured at fair value	0	0
Interest rate swap | Level 2 | Prepaid expenses and other
Assets
Assets measured at fair value	0.2	0.6
Interest rate swap | Level 3 | Prepaid expenses and other
Assets
Assets measured at fair value	0	0
Contingent consideration receivable | Level 1 | Prepaid expenses and other
Assets
Assets measured at fair value	0	0
Contingent consideration receivable | Level 2 | Prepaid expenses and other
Assets
Assets measured at fair value	0	0
Contingent consideration receivable | Level 3
Assets
Assets measured at fair value	0.5
Contingent consideration receivable | Level 3 | Prepaid expenses and other
Assets
Assets measured at fair value	$ 0.5	$ 0

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Recurring basis | Level 3
Fair Value Measurement
Assets measured at fair value		$ 0.5	$ 0
Contingent consideration receivable
Fair Value Measurement
Consideration in contingent nature (as a percent)	40.00%
Contingent consideration receivable | Level 3
Fair Value Measurement
Period of contingent consideration receivable	18 months
Contingent consideration receivable | Recurring basis | Level 3
Fair Value Measurement
Assets measured at fair value		$ 0.5
Security Business | Discontinued Operations, Disposed of by Sale
Fair Value Measurement
Period of cash consideration to be received	18 months

Fair Value Measurement - Contin

Fair Value Measurement - Contingent Liability Rollforward (Details) - Level 3 - Contingent acquisition consideration - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of the beginning and ending balances for the liabilities measured at fair value using significant unobservable inputs (Level 3)
Balance at the beginning of the period	$ (0.3)	$ (1.5)	$ (3.3)
Increase related to new acquisitions	0	0	0
Payment of contingent consideration	0.1	1.8	0.9
Change in fair value	0.2	(0.5)	0.9
Balance at the end of the period	$ 0	$ (0.3)	$ (1.5)

Fair Value Measurement - Carryi

Fair Value Measurement - Carrying Value and Estimated Fair Value Table (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair Value Measurement
Long-term borrowings	$ 225.1	$ 250.8
Carrying Amount
Fair Value Measurement
Cash and cash equivalents	18.7	18.2
Total Fair Value
Fair Value Measurement
Cash and cash equivalents	18.7	18.2
Senior credit facility, net of original discount on borrowings and deferred financing costs
Fair Value Measurement
Long-term borrowings	223.1	248.4
Senior credit facility, net of original discount on borrowings and deferred financing costs | Carrying Amount
Fair Value Measurement
Long-term borrowings	223.1	248.4
Senior credit facility, net of original discount on borrowings and deferred financing costs | Total Fair Value
Fair Value Measurement
Long-term borrowings	223.1	248.4
Other borrowings
Fair Value Measurement
Long-term borrowings	2	2.4
Other borrowings | Carrying Amount
Fair Value Measurement
Long-term borrowings	2	2.4
Other borrowings | Total Fair Value
Fair Value Measurement
Long-term borrowings	$ 2	$ 2.4

Borrowing Arrangements (Long-Te

Borrowing Arrangements (Long-Term Borrowings Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total obligations under credit facility and other borrowings	$ 225.1	$ 250.8
Less: Current portion of obligations under credit facility and other borrowings	15.2	14.5
Total long-term obligations under credit facility and other borrowings	209.9	236.3
Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Total obligations under credit facility and other borrowings	223.1	248.4
Other borrowings
Debt Instrument [Line Items]
Total obligations under credit facility and other borrowings	$ 2	$ 2.4

Borrowing Arrangements (Princip

Borrowing Arrangements (Principal Maturities of Long-Term Debt) (Details ) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Future minimum payments of total long-term debt
2,016	$ 16.5
2,017	20.4
2,018	20.1
2,019	20
2,020	152.3
Thereafter	0
Total debt	229.3
Current portion of long-term obligations under credit facility and other long-term borrowings	15.2	$ 14.5
Less: Original discount on borrowings	1.8
Less: Deferred financing costs	2.4
Total long-term obligations under credit facility and other borrowings	$ 209.9	$ 236.3

Borrowing Arrangements - Additi

Borrowing Arrangements - Additional Information (Details)	Feb. 20, 2015USD ($)	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015USD ($)$ / shares	Dec. 31, 2014USD ($)	Feb. 20, 2020	Oct. 02, 2012USD ($)
Debt Instrument [Line Items]
Discount on debt				$ (1,800,000)
Redemption value of convertible debentures outstanding				$ 1,100,000	$ 1,200,000
Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Weighted average interest rate on senior credit facility (as a percent)				2.70%	3.20%
Convertible Debentures
Debt Instrument [Line Items]
Redemption price (in dollars per share) | $ / shares				$ 19.18
Debt redemptions				$ 100,000	$ 0
Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
Losses on the extinguishment of debt related to debt discount and debt issuance costs	600,000
Restated Credit Agreement | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Maximum borrowing capacity	200,000,000
Current borrowing capacity				82,700,000
Letters of credit outstanding				52,400,000
Borrowings excluding debt discount				227,300,000
Discount on debt				1,800,000
Deferred financing cost				2,400,000
Restated Credit Agreement | Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	100,000,000
Outstanding borrowing	147,300,000
Restated Credit Agreement | Letter of credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	100,000,000
Outstanding borrowing	53,400,000
Restated Credit Agreement | Swingline Loans
Debt Instrument [Line Items]
Maximum borrowing capacity	20,000,000
Restated Credit Agreement | Term loan facility
Debt Instrument [Line Items]
Maximum borrowing capacity	200,000,000
Amount drawn	10,400,000
Year one amortization of principal	15,000,000
Year two amortization of principal	15,000,000
Year three amortization of principal	20,000,000
Year four amortization of principal	20,000,000
Year five amortization of principal	20,000,000
Year six amortization of principal	$ 110,000,000
Restated Credit Agreement | Maximum | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Total debt to EBITDA ratio that is required to be maintained (less than)		4
Restated Credit Agreement | Maximum | Senior credit facility, net of original discount on borrowings and deferred financing costs | Forecast
Debt Instrument [Line Items]
Total debt to EBITDA ratio that is required to be maintained (less than)			3.75			3.5
Restated Credit Agreement | Minimum | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Fixed charge coverage ratio that is required to be maintained	1.25
Restated Credit Agreement | LIBOR Loans | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Period of total debt to EBITDA ratio	12 months
Restated Credit Agreement | Base rate loans | Senior credit facility, net of original discount on borrowings and deferred financing costs | Base Rate
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	0.50%
Restated Credit Agreement | Base rate loans | Senior credit facility, net of original discount on borrowings and deferred financing costs | LIBOR
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	1.00%
Restated Credit Agreement | Credit Agreement | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 105,300,000
Senior Credit Facility | Senior credit facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 450,000,000
Weighted average interest rate on senior credit facility (as a percent)				2.60%	3.20%
Senior Credit Facility | Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity							200,000,000
Senior Credit Facility | Letter of credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity							100,000,000
Senior Credit Facility | Term loan facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 250,000,000						$ 250,000,000

Leases and Contingencies (Minim

Leases and Contingencies (Minimum Rental Commitments) (Details) $ in Millions	Dec. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,016	$ 222
2,017	190.6
2,018	158.7
2,019	137.2
2,020	70.4
2021 and thereafter	206.2
Total future minimum payments due	985.1
Minimum commitments for leases that expire in less than one year	$ 18.6

Leases and Contingencies - Addi

Leases and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense, including contingent rents	$ 400.3	$ 330.8	$ 326.8
Contingent rent expense	186.2	139.7	$ 133.9
Future sublease income under non-cancellable operating leases	29.8
Recent guidance on business combinations
Business combinations
Contingent payment obligations accrued	$ 0.1	$ 0.3

Income Taxes - Income Tax Compo

Income Taxes - Income Tax Components (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of income before taxes
United States									$ 21.7	$ 23.5	$ 21.4
Foreign									3.4	2.4	2.2
Earnings before income taxes	$ 3.8	$ 7.9	$ 10.2	$ 3.2	$ 10.3	$ 7.8	$ 10.5	$ (2.7)	25.1	25.9	23.6
Current provision:
U.S. federal									11.5	9.5	3.2
Foreign									1.2	0.8	0.7
State									1.8	1.6	2.2
Total current									14.5	11.9	6.1
Deferred provision:
U.S. federal									(4.9)	(1.5)	2.3
Foreign									0.1	0.1	(0.1)
State									(4.9)	(10.7)	0.5
Total deferred									(9.7)	(12.1)	2.7
Income tax (benefit) expense	$ 0.4	$ 3.5	$ (0.4)	$ 1.3	$ 0.2	$ 2.8	$ 4.2	$ (7.4)	$ 4.8	$ (0.2)	$ 8.8

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Net operating loss carry forwards	$ 20.6	$ 22
Accrued expenses	34.1	34.3
Accrued compensation	12.1	12
Book over tax cost unfavorable acquired lease contracts	20.6	25.2
Other	0.7	0.4
Total gross deferred tax assets	88.1	93.9
Less: valuation allowance	(6.8)	(12.3)
Total deferred tax assets	81.3	81.6
Deferred tax liabilities
Prepaid expenses	(0.4)	(0.6)
Undistributed foreign earnings	(1)	(0.8)
Tax over book depreciation and amortization	(11)	(16.7)
Tax over book goodwill amortization	(28.7)	(28.7)
Tax over book cost favorable acquired lease contracts	(15.6)	(19.8)
Equity investments in unconsolidated entities	(8.8)	(9.2)
Other	(0.1)	(0.7)
Total deferred tax liabilities	(65.6)	(76.5)
Net deferred tax asset	$ 15.7	$ 5.1

Income Taxes - Balance Sheet Am

Income Taxes - Balance Sheet Amounts (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Deferred tax asset, current	$ 12.3	$ 10.9
Deferred tax asset noncurrent	3.4
Deferred tax liability	0	(5.8)
Net deferred tax asset	$ 15.7	$ 5.1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes
Valuation allowances attributable to state net operating loss carryforwards and other state deferred tax assets of Central Parking	$ 6.8	$ 12.3
Change in valuation allowance	5.5	9.1	$ 4
Taxes paid for United States federal, state and foreign income taxes	18.1	$ 1.3	$ 1.3
State
Income Taxes
Operating loss carryforwards, amount	19.7
Canada
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	2.4
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	1
Puerto Rico
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	5.6
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	$ 2.5

Income Taxes - Effective Tax Re

Income Taxes - Effective Tax Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of income tax provision (benefit) to the amount computed by multiplying book income/(loss) before income taxes by federal income tax rate
Tax at statutory rate									$ 8.8	$ 9.1	$ 8.3
Permanent differences									1.4	1	0.8
State taxes, net of federal benefit									0.3	0.8	1.4
Effect of foreign tax rates									(0.1)	0	0
Minority interest									(1)	(1.1)	(0.9)
Equity investments in unconsolidated entities									0	2.4	0
Current year adjustment to deferred taxes									1.5	(1.3)	4
Recognition of tax credits									(1.2)	(1.5)	(1.7)
Other									0.6	(0.5)	0.9
Income tax expense before change in valuation allowance									10.3	8.9	12.8
Change in valuation allowance									(5.5)	(9.1)	(4)
Income tax (benefit) expense	$ 0.4	$ 3.5	$ (0.4)	$ 1.3	$ 0.2	$ 2.8	$ 4.2	$ (7.4)	$ 4.8	$ (0.2)	$ 8.8

Benefit Plans - Deferred Compen

Benefit Plans - Deferred Compensation Arrangements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental pension arrangements for key executives
Benefit Plans
Employee's eligibility age to receive a defined monthly benefit	65 years
Accrual for present value of future benefit payments	$ 3.7	$ 5
Expenses related to the plan	0.2	0.4	$ 0.1
Deferred benefits for certain former key executives | Central
Benefit Plans
Accrual for present value of future benefit payments	3.8	4.2
Expenses related to the plan	$ 0.1	1	$ 0.6
Minimum period over which the annual payments will be made when the executives retire or upon death or disability	10 years
Face value of life insurance contracts	$ 6.9	10.8
Cash surrender value of life insurance contracts	$ 3.9	$ 3.9

Benefit Plans - Savings and Rei

Benefit Plans - Savings and Reitirement Plans (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)saving_retirement_plan	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Benefit Plans
Number of plans sponsored by the company | saving_retirement_plan	2
Expenses related to the savings and retirement plan | $	$ 2.1	$ 1.8	$ 1.8
Savings and retirement plan
Benefit Plans
Employer match of first tier of employee contributions (as a percent)	50.00%
First tier percentage of compensation eligible for match by employer	6.00%

Benefit Plans - Non-qualified D

Benefit Plans - Non-qualified Deferred Compensation Plans (Details) - Non-qualified deferred compensation plan - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Benefit Plans
Maximum annual contribution an employee is permitted to defer	$ 100,000
Cash surrender value of the Company owned life insurance ("COLI") policies	10,900,000	$ 9,900,000
Deferred compensation liability	$ 12,500,000	$ 11,300,000

Benefit Plans - Multiemployer D

Benefit Plans - Multiemployer Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Multiemployer plans
Expenses for contributions not reimbursed by clients and related to multiemployer defined benefit and defined contribution plans	$ 4.6	$ 2.7	$ 0.6
Red Zone | Maximum
Multiemployer plans
Multiemployer plans funded status (as a percent)	65.00%
Yellow Zone | Maximum
Multiemployer plans
Multiemployer plans funded status (as a percent)	80.00%
Green Zone | Minimum
Multiemployer plans
Multiemployer plans funded status (as a percent)	80.00%
Teamsters Local Union 727 | Minimum
Multiemployer plans
Entity's contributions as a percentage of total contributions	5.00%
Multiemployer defined benefit pension plans | Teamsters Local Union 727 | Green Zone
Multiemployer plans
Contributions	$ 3.5	3.3	3.4
Multiemployer defined benefit pension plans | Local 272 Labor Management | Green Zone
Multiemployer plans
Contributions	2.2	2	2.4
Multiemployer defined benefit pension plans | Local 911 (Los Angeles Airport) | Green Zone
Multiemployer plans
Contributions	$ 2.2	$ 0	$ 0

Management Contracts and Rela80

Management Contracts and Related Arrangements with Affiliates (Details)

Oct. 02, 2012

Dec. 31, 2015USD ($)

Sep. 30, 2015USD ($)

Jun. 30, 2015USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Sep. 30, 2014USD ($)

Jun. 30, 2014USD ($)

Mar. 31, 2014USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Dec. 31, 2013USD ($)building

Management Contracts and Related Arrangements with Affiliates

Net management fees

$ 82,100,000

$ 85,800,000

$ 88,300,000

$ 94,100,000

$ 85,500,000

$ 77,900,000

$ 84,900,000

$ 90,000,000

$ 350,300,000

$ 338,300,000

$ 347,300,000

Myron C. Warshauer | Employment agreement

Management Contracts and Related Arrangements with Affiliates

Post-employment benefit payments received by related party

0

500,000

500,000

Myron C. Warshauer | Consulting agreement

Management Contracts and Related Arrangements with Affiliates

Amount paid under arrangement

0

200,000

$ 200,000

D&E Parking, Inc. | Property management services

Management Contracts and Related Arrangements with Affiliates

Number of facilities services are provided for | building

12

Net management fees

$ 0

$ 0

$ 300,000

Central

Management Contracts and Related Arrangements with Affiliates

Standstill period for Central stockholders under the Initial Closing Agreements

4 years

Central | Kohlberg, Lubert-Adler and Versa

Management Contracts and Related Arrangements with Affiliates

Standstill period for related party under the Additional Closing Agreements

4 years

Central | Kohlberg, Lubert-Adler and Versa | Maximum

Management Contracts and Related Arrangements with Affiliates

Percentage of stock ownership for third party shares to be counted as present and vote as agreed at any meeting of stockholders

10.00%

Central | Lubert-Adler Entities

Management Contracts and Related Arrangements with Affiliates

Common stock held (as a percent)

6.00%

6.00%

Central | Kohlberg Entities

Management Contracts and Related Arrangements with Affiliates

Common stock held (as a percent)

16.00%

16.00%

Central | Versa Entities

Management Contracts and Related Arrangements with Affiliates

Common stock held (as a percent)

4.00%

4.00%

Bradley Agreement (Details)

Bradley Agreement (Details)	12 Months Ended
	Dec. 31, 2015USD ($)parking_space	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2002USD ($)
Deficiency payments:
Balance at the beginning of the year	$ 13,300,000	$ 14,600,000
Deficiency payments made	100,000	0
Deficiency repayment received	(1,800,000)	(1,300,000)
Balance at the end of the year	11,600,000	13,300,000	$ 14,600,000
Compensation
Management fees	$ 0	0	$ 0
Bradley International Airport parking facilities operating agreement
Agreement
Agreement period with the State of Connecticut for operation of parking spaces	25 years
Number of garage parking spaces at Bradley International Airport operated | parking_space	3,500
Annual minimum guaranteed payment to the State by the trustee	$ 11,000,000	10,800,000
Maximum premium percentage on initial deficiency payment	10.00%
Deficiency payments:
Net deficiency payments received (paid)	$ 1,700,000	(1,300,000)
Interest income on deficiency payment received from trustee	400,000	500,000
Premium income on deficiency payment received from trustee	200,000	100,000
Estimated accrued deficiency payments	$ 0
Compensation
Management fee apportioned to the entity (as a percent)	60.00%
Management fee apportioned to an un-affiliated entity (as a percent)	40.00%
Unrecognized cumulative management fees	$ 15,700,000	$ 14,700,000
Bradley International Airport parking facilities operating agreement | Minimum
Agreement
Annual minimum guaranteed payment to the State by the trustee				$ 8,300,000
Bradley International Airport parking facilities operating agreement | Maximum
Agreement
Annual minimum guaranteed payment to the State by the trustee	13,200,000
Bradley International Airport parking facilities operating agreement | State of Connecticut special facility revenue bonds | Minimum
Agreement
Annual principal and interest on revenue bonds				$ 3,600,000
Bradley International Airport parking facilities operating agreement | State of Connecticut special facility revenue bonds | Maximum
Agreement
Annual principal and interest on revenue bonds	$ 4,500,000

Accumulated Other Comprehensi82

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ (0.2)	$ 0.1	$ (0.4)
Change in other comprehensive income (loss)	(0.9)	(0.3)	0.5
Balance at the end of the period	(1.1)	(0.2)	0.1
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(0.5)	(0.4)	0.1
Change in other comprehensive income (loss)	(0.7)	(0.2)	(0.5)
Balance at the end of the period	(1.2)	(0.5)	(0.4)
Effective Portion of Unrealized Gain (Loss) on Derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	0.3	0.5	(0.5)
Change in other comprehensive income (loss)	(0.2)	(0.2)	1
Balance at the end of the period	$ 0.1	$ 0.3	$ 0.5

Domestic and Foreign Operatio83

Domestic and Foreign Operations (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)segmentprovince	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Business Unit Segment Information
Number of operating segments | segment									4
Revenues:
Lease contracts	$ 142.1	$ 146.6	$ 146.4	$ 135.8	$ 126	$ 129	$ 125	$ 116.6	$ 570.9	$ 496.6	$ 489.6
Management contracts	82.1	85.8	88.3	94.1	85.5	77.9	84.9	90	350.3	338.3	347.3
Total parking services revenue									921.2	834.9	836.9
Reimbursed management contract revenue	181.2	168.3	170.9	174.3	172.7	173.4	164.5	169.2	694.7	679.8	629.9
Total revenue	405.4	400.7	405.6	404.2	384.2	380.3	374.4	375.8	1,615.9	1,514.7	1,466.8
Gross profit
Lease contracts	8.5	10.6	11.9	7.1	10.9	12.5	13	4.5	38.1	40.9	33.5
Management contracts	31.2	32.2	34.5	34.1	33.6	31.1	34.9	30.8	132	130.4	138.6
Total gross profit	39.7	42.8	46.4	41.2	44.5	43.6	47.9	35.3	170.1	171.3	172.1
Gross Margin
General and administrative expenses	23.1	23.8	24.7	25.7	26.3	24.1	25	26.1	$ 97.3	$ 101.5	$ 98.9
General and administrative expense percentage of gross profit									57.00%	59.00%	57.00%
Depreciation and amortization	9.7	8.2	8.2	7.9	7.8	7.6	7.7	7.2	$ 34	$ 30.3	$ 31.2
Operating income	6.9	10.8	13.5	7.6	10.4	11.9	15.2	2	38.8	39.5	42
Other expense (income)
Interest expense	2.7	3	3	4	4	4.2	4.8	4.8	12.7	17.8	19
Interest income	(0.1)	0	0	(0.1)	(0.1)	(0.1)	(0.1)	(0.1)	(0.2)	(0.4)	(0.6)
(Gain) loss on sale of business	0	(0.5)	0	0	0	0	0	0	(0.5)	0	0
Gain on contribution of a business to an unconsolidated entity	0	0	0	0	(4.1)	0	0	0	0	(4.1)	0
Equity in losses from investment in unconsolidated entity	0.5	0.4	0.3	0.5	0.3	0	0	0	1.7	0.3	0
Total other expenses (income)	3.1	2.9	3.3	4.4	0.1	4.1	4.7	4.7	13.7	13.6	18.4
Earnings before income taxes	3.8	7.9	10.2	3.2	10.3	7.8	10.5	(2.7)	25.1	25.9	23.6
Income tax (benefit) expense	0.4	3.5	(0.4)	1.3	0.2	2.8	4.2	(7.4)	4.8	(0.2)	8.8
Net income	3.4	4.4	10.6	1.9	10.1	5	6.3	4.7	20.3	26.1	14.8
Less: Net income attributable to noncontrolling interest	0.8	0.8	0.8	0.5	0.8	0.8	0.9	0.5	2.9	3	2.7
Net income attributable to SP Plus Corporation	$ 2.6	$ 3.6	$ 9.8	$ 1.4	$ 9.3	$ 4.2	$ 5.4	$ 4.2	$ 17.4	23.1	12.1
Region One
Business Unit Segment Information
Number of Canadian provinces included in region one | province									3
Operating segment | Region One
Revenues:
Lease contracts									$ 208.1	206	199.1
Management contracts									84.7	84	95.3
Total parking services revenue									292.8	290	294.4
Gross profit
Lease contracts									12.5	12.4	10.6
Management contracts									38	36	42.8
Total gross profit									$ 50.5	$ 48.4	$ 53.4
Gross Margin
Lease contracts (as a percent)									6.00%	6.00%	5.00%
Management contracts (as a percent)									45.00%	43.00%	45.00%
Operating segment | Region Two
Revenues:
Lease contracts									$ 125.7	$ 119.9	$ 124
Management contracts									79.6	83.2	87
Total parking services revenue									205.3	203.1	211
Gross profit
Lease contracts									21.1	19.8	18.9
Management contracts									32.9	35.8	38.8
Total gross profit									$ 54	$ 55.6	$ 57.7
Gross Margin
Lease contracts (as a percent)									17.00%	17.00%	15.00%
Management contracts (as a percent)									41.00%	43.00%	45.00%
Operating segment | Region Three
Revenues:
Lease contracts									$ 108.8	$ 117.8	$ 120.6
Management contracts									27.8	25.8	23.4
Total parking services revenue									136.6	143.6	144
Gross profit
Lease contracts									2.2	4.7	(0.1)
Management contracts									14.2	14.3	12.6
Total gross profit									$ 16.4	$ 19	$ 12.5
Gross Margin
Lease contracts (as a percent)									2.00%	4.00%	0.00%
Management contracts (as a percent)									51.00%	55.00%	54.00%
Operating segment | Region Four
Revenues:
Lease contracts									$ 123.8	$ 48.5	$ 43.7
Management contracts									100.6	103.3	96.6
Total parking services revenue									224.4	151.8	140.3
Gross profit
Lease contracts									5.5	3.6	3.2
Management contracts									24.5	26.4	24.6
Total gross profit									$ 30	$ 30	$ 27.8
Gross Margin
Lease contracts (as a percent)									4.00%	7.00%	7.00%
Management contracts (as a percent)									24.00%	26.00%	25.00%
Operating segment | Region Five
Revenues:
Lease contracts									$ 4.4	$ 2.7	$ 2.6
Management contracts									43.8	29.8	33.7
Total parking services revenue									48.2	32.5	36.3
Gross profit
Lease contracts									0.3	0.2	0
Management contracts									11.4	11.7	11.3
Total gross profit									$ 11.7	$ 11.9	$ 11.3
Gross Margin
Lease contracts (as a percent)									7.00%	8.00%	(2.00%)
Management contracts (as a percent)									26.00%	39.00%	34.00%
Operating segment | Other
Revenues:
Lease contracts									$ 0	$ 1.7	$ (0.4)
Management contracts									13.9	12.2	11.3
Total parking services revenue									13.9	13.9	10.9
Gross profit
Lease contracts									(3.5)	0.2	0.9
Management contracts									11	6.2	8.5
Total gross profit									$ 7.5	$ 6.4	$ 9.4

Unaudited Quarterly Results (De

Unaudited Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Parking services revenue
Lease contracts	$ 142.1	$ 146.6	$ 146.4	$ 135.8	$ 126	$ 129	$ 125	$ 116.6	$ 570.9	$ 496.6	$ 489.6
Management contracts	82.1	85.8	88.3	94.1	85.5	77.9	84.9	90	350.3	338.3	347.3
Reimbursed management contract revenue	181.2	168.3	170.9	174.3	172.7	173.4	164.5	169.2	694.7	679.8	629.9
Total revenue	405.4	400.7	405.6	404.2	384.2	380.3	374.4	375.8	1,615.9	1,514.7	1,466.8
Cost of parking services
Lease contracts	133.6	136	134.5	128.7	115.1	116.5	112	112.1	532.8	455.7	456.1
Management contracts	50.9	53.6	53.8	60	51.9	46.8	50	59.2	218.3	207.9	208.7
Reimbursed management contract expense	181.2	168.3	170.9	174.3	172.7	173.4	164.5	169.2	694.7	679.8	629.9
Total cost of parking services	365.7	357.9	359.2	363	339.7	336.7	326.5	340.5	1,445.8	1,343.4	1,294.7
Gross profit
Lease contracts	8.5	10.6	11.9	7.1	10.9	12.5	13	4.5	38.1	40.9	33.5
Management contracts	31.2	32.2	34.5	34.1	33.6	31.1	34.9	30.8	132	130.4	138.6
Total gross profit	39.7	42.8	46.4	41.2	44.5	43.6	47.9	35.3	170.1	171.3	172.1
General and administrative expenses	23.1	23.8	24.7	25.7	26.3	24.1	25	26.1	97.3	101.5	98.9
Depreciation and amortization	9.7	8.2	8.2	7.9	7.8	7.6	7.7	7.2	34	30.3	31.2
Operating income	6.9	10.8	13.5	7.6	10.4	11.9	15.2	2	38.8	39.5	42
Other expense (income):
Interest expense	2.7	3	3	4	4	4.2	4.8	4.8	12.7	17.8	19
Interest income	(0.1)	0	0	(0.1)	(0.1)	(0.1)	(0.1)	(0.1)	(0.2)	(0.4)	(0.6)
(Gain) loss on sale of business	0	(0.5)	0	0	0	0	0	0	(0.5)	0	0
Gain on contribution of a business to an unconsolidated entity	0	0	0	0	(4.1)	0	0	0	0	(4.1)	0
Equity in losses from investment in unconsolidated entity	0.5	0.4	0.3	0.5	0.3	0	0	0	1.7	0.3	0
Total other expenses (income)	3.1	2.9	3.3	4.4	0.1	4.1	4.7	4.7	13.7	13.6	18.4
Earnings before income taxes	3.8	7.9	10.2	3.2	10.3	7.8	10.5	(2.7)	25.1	25.9	23.6
Income tax expense (reversal)	0.4	3.5	(0.4)	1.3	0.2	2.8	4.2	(7.4)	4.8	(0.2)	8.8
Net income	3.4	4.4	10.6	1.9	10.1	5	6.3	4.7	20.3	26.1	14.8
Less: Net income attributable to noncontrolling interest	0.8	0.8	0.8	0.5	0.8	0.8	0.9	0.5	2.9	3	2.7
Net income attributable to SP Plus Corporation	$ 2.6	$ 3.6	$ 9.8	$ 1.4	$ 9.3	$ 4.2	$ 5.4	$ 4.2	$ 17.4	$ 23.1	$ 12.1
Net income per share
Basic (in dollars per share)	$ 0.11	$ 0.17	$ 0.44	$ 0.06	$ 0.42	$ 0.20	$ 0.24	$ 0.20	$ 0.78	$ 1.05	$ 0.55
Diluted (in dollars per share)	$ 0.11	$ 0.16	$ 0.43	$ 0.06	$ 0.41	$ 0.19	$ 0.24	$ 0.19	$ 0.77	$ 1.03	$ 0.54
Weighted average shares outstanding
Basic (in shares)	22,276,763	22,205,707	22,145,190	22,127,725	22,071,706	21,997,394	21,991,965	21,977,836	22,189,140	22,009,800	21,902,870
Diluted (in shares)	22,486,888	22,548,166	22,521,832	22,528,608	22,451,557	22,426,787	22,398,886	22,351,845	22,511,759	22,407,343	22,249,584

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2012
Subsequent Event [Line Items]
Expense of net debt working capital disallowed	$ 1.6
Expense disallowed under net debt working capital, net of tax	0.9
Central Merger
Subsequent Event [Line Items]
Net debt working capital		$ 296.3
Amount in excess of upper threshold		11.3
Expense of net debt working capital disallowed	1.6
Expense disallowed under net debt working capital, net of tax	$ 0.9
February 19, 2016 | Central Merger
Subsequent Event [Line Items]
Net debt working capital		291.6
Amount in excess of upper threshold		$ 6.6

Schedule II-Valuation and Qua86

Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts
Changes in valuation and qualifying accounts
Balance at Beginning of Year	$ 1	$ 0.7	$ 0.5
Additions Charged to Costs and Expenses	0.7	0.7	0.6
Reductions	(0.8)	(0.5)	(0.4)
Balance at End of Year	0.9	1	0.7
Tax valuation account
Changes in valuation and qualifying accounts
Balance at Beginning of Year	12.3	21.3	25.3
Additions Charged to Costs and Expenses	0	0	2.1
Reductions	(5.5)	(9)	(6)
Balance at End of Year	$ 6.8	$ 12.3	$ 21.3