Significant Accounting Policies and Practices (Policies)	12 Months Ended
Dec. 31, 2014
Significant Accounting Policies and Practices.
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.
Reclassification	Reclassifications Certain reclassifications, having no effect on the consolidated balance sheet, consolidated statements of income, consolidated statements of comprehensive income, consolidated statements of equity, consolidated statements of cash flows or earnings per share have been made to the previously issued notes to consolidated financial statements to conform to the current period's presentation. Specifically, prior year deferred tax assets and liabilities related to favorable and unfavorable acquired lease contracts were reclassified to conform to the Company's presentation of deferred tax assets and liabilities in the current period as presented in Note 13. Income Taxes.
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. Cash and cash equivalents that are restricted as to withdrawal or use under the terms of certain contractual agreements was $465 and $1,001 as of December 31, 2014 and 2013, respectively, and are included within Cash and Cash Equivalents within the Consolidated Balance Sheet.
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. As of December 31, 2014 and 2013, the Company's allowance for doubtful accounts was $952 and $695, respectively.
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 of approximately 8.3 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 that are consistent with underlying valuation analysis used in determining the fair value as of the date the contract is acquired.
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 the 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, which are comprised of its five operating regions. 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 units, 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. As part of the 2014 and 2013 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 underperformance 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 its 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. Debt issuance costs of $2,635 and $3,890 at December 31, 2014 and 2013, respectively, are included in Other assets, net within the Consolidated Balance Sheets and are reflected net of accumulated amortization of $7,333 and $6,078 respectively. Amortization expense related to debt issuance costs and included in Interest expense was $1,315, $1,484 and $1,211 for the years ended December 31, 2014, 2013 and 2012, respectively.
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 $30,782 and $29,310 are included within Accounts payable within the Consolidated Balance Sheets as of December 31, 2014, and 2013, 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, we are obligated to pay directly or reimburse the insurance carrier for the first $500 of each loss covered by our general/garage liability or automobile liability policies and $250 for each loss covered by our workers' compensation and garagekeepers 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 advisors 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 contingencies	Legal and Other 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. During the year ended December 31, 2014, we recorded $1,303, of costs (net of expected recovery of 80% of the total cost through the applicable indemnity discussed further below and in 2. Acquisitions) in Cost of Parking Services-Leases within the Consolidated Statement 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 have engaged a third-party general contractor to complete certain structural and other repair projects. The Company expects to incur substantial 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 estimates the additional Structural and Repair Costs to be between $7,000 and $22,000; however, the Company continues to assess and determine the full extent of the required repairs and estimated costs associated with the lease contracts acquired in the Central Merger. The Company currently expects to recover 80% of the Structural and Repair Costs incurred prior to October 1, 2015 through the applicable indemnity discussed further in 2. Acquisitions. While the Company is unable to estimate with certainty when such costs will be incurred, it is expected that all or a substantial majority of these costs will be incurred in early- to mid-calendar year 2015 and prior to October 1, 2015.
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. ("JPMorgan Chase Bank"), Bank of America, N.A. ("Bank of America") and PNC Bank, N.A. in an initial aggregate Notional Amount of $150,000 (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 Credit Agreement ("the Credit Agreement"), originally equal to the Notional Amount at 0.7525% per annum plus the applicable margin rate for LIBOR loans under the Credit Agreement 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 Agreement. 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 within interest expense. As of December 31, 2014, no ineffective portion of cash flow hedges has been recognized in interest expense. 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, 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 Principal 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. Advertising expenses aggregated $1,318, $971 and $796 for 2014, 2013 and 2012, respectively.
Stock-Based Compensation	Stock-Based Compensation Share based payments to employees including grants of employee stock options, restricted stock units and performance-based stock 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 forty six partnerships, joint ventures or similar arrangements which operate parking facilities, of which twenty-nine are VIEs and seventeen 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 Financial Statements of Financial Position. 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 Revenue within the Consolidated Financial Statements of Income. The equity earnings in these related investments was $1,945, $2,115 and $1,014 for the year ended December 31, 2014, 2013 and 2012, 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 will provide 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. The Company accounts for its investment in the joint venture with Parkmobile using the equity method of accounting. As a result of the deconsolidation, the Company recognized a pre-tax gain of $4,161, 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 Contribution of a Business to an Unconsolidated Entity within the Consolidated Statement of Income. The fair value of the investment in the joint venture with Parkmobile was determined using an income approach. The income approach required several assumptions including projected cash flows discounted using a rate approximating the cost of capital of the joint venture and is classified within level 3 of the fair value hierarchy. The equity earnings in the Parkmobile joint venture is 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 percent, ownership interest and the results of which are consolidated and included within in our consolidated financial statements.
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 settled. Income tax expense is the tax payable for the period plus the change during the period in deferred income taxes. We have certain state net operating loss carry forwards which expire in 2028. Our 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). We consider a number of factors in our assessment of the recoverability of our 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 our operating performance along with these considerations may significantly impact the amount of net operating losses ultimately recovered, and our assessment of their recoverability. When evaluating our tax positions, we account for uncertainty in income taxes in our consolidated financial statements. The evaluation of a tax position is a two-step process, the first step being recognition. We determine 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 December 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-11, Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities. This update requires additional disclosures about offsetting and related arrangements on assets and liabilities to enable users of financial statements to understand the effect of such arrangements on an entity's financial position as reported. This amendment is effective for fiscal 2014 and retrospective application is required. The adoption of this guidance on January 1, 2014 did not have an impact to the Company's financial position, results of operations or cash flows or financial statement disclosures. In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740), Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists to eliminate diversity in practice. Under this ASU, an unrecognized tax benefit, or a portion of an unrecognized tax benefit that exists at the reporting date, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if certain criteria are met. This amendment is effective for fiscal years and interim periods within those years beginning after December 15, 2013. The adoption of this guidance on January 1, 2014 did not have an impact to the Company's financial position, results of operations or cash flows or financial statement disclosures. Accounting Pronouncements to be Adopted In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The amendments in ASU No. 2014-09 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, 2016. 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. In June 2014, the FASB issued Accounting Standards Update (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 15 December 2015 and interim periods within those annual periods. Early adoption is permitted. The Company is currently assessing the impact on the Company's financial position, results of operations, cash flows and financial statement disclosures.

Significant Accounting Policies and Practices (Policies)

12 Months Ended

Dec. 31, 2014

Significant Accounting Policies and Practices.

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.

Reclassification

Reclassifications

Certain reclassifications, having no effect on the consolidated balance sheet, consolidated statements of income, consolidated statements of comprehensive income, consolidated statements of equity, consolidated statements of cash flows or earnings per share have been made to the previously issued notes to consolidated financial statements to conform to the current period's presentation. Specifically, prior year deferred tax assets and liabilities related to favorable and unfavorable acquired lease contracts were reclassified to conform to the Company's presentation of deferred tax assets and liabilities in the current period as presented in Note 13. Income Taxes.

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 $465 and $1,001 as of December 31, 2014 and 2013, 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, 2014 and 2013, the Company's allowance for doubtful accounts was $952 and $695, 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 of approximately 8.3 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 that are consistent with underlying valuation analysis used in determining the fair value as of the date the contract is acquired.

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 the 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, which are comprised of its five operating regions. 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 units, 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. As part of the 2014 and 2013 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 underperformance 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 its 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. Debt issuance costs of $2,635 and $3,890 at December 31, 2014 and 2013, respectively, are included in Other assets, net within the Consolidated Balance Sheets and are reflected net of accumulated amortization of $7,333 and $6,078 respectively. Amortization expense related to debt issuance costs and included in Interest expense was $1,315, $1,484 and $1,211 for the years ended December 31, 2014, 2013 and 2012, 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 $30,782 and $29,310 are included within Accounts payable within the Consolidated Balance Sheets as of December 31, 2014, and 2013, 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, we are obligated to pay directly or reimburse the insurance carrier for the first $500 of each loss covered by our general/garage liability or automobile liability policies and $250 for each loss covered by our workers' compensation and garagekeepers 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 advisors 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 contingencies

Legal and Other 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. During the year ended December 31, 2014, we recorded $1,303, of costs (net of expected recovery of 80% of the total cost through the applicable indemnity discussed further below and in 2. Acquisitions) in Cost of Parking Services-Leases within the Consolidated Statement 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 have engaged a third-party general contractor to complete certain structural and other repair projects. The Company expects to incur substantial 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 estimates the additional Structural and Repair Costs to be between $7,000 and $22,000; however, the Company continues to assess and determine the full extent of the required repairs and estimated costs associated with the lease contracts acquired in the Central Merger. The Company currently expects to recover 80% of the Structural and Repair Costs incurred prior to October 1, 2015 through the applicable indemnity discussed further in 2. Acquisitions. While the Company is unable to estimate with certainty when such costs will be incurred, it is expected that all or a substantial majority of these costs will be incurred in early- to mid-calendar year 2015 and prior to October 1, 2015.

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. ("JPMorgan Chase Bank"), Bank of America, N.A. ("Bank of America") and PNC Bank, N.A. in an initial aggregate Notional Amount of $150,000 (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 Credit Agreement ("the Credit Agreement"), originally equal to the Notional Amount at 0.7525% per annum plus the applicable margin rate for LIBOR loans under the Credit Agreement 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 Agreement. 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 within interest expense. As of December 31, 2014, no ineffective portion of cash flow hedges has been recognized in interest expense.

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, 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 Principal 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. Advertising expenses aggregated $1,318, $971 and $796 for 2014, 2013 and 2012, respectively.

Stock-Based Compensation

Share based payments to employees including grants of employee stock options, restricted stock units and performance-based stock 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 forty six partnerships, joint ventures or similar arrangements which operate parking facilities, of which twenty-nine are VIEs and seventeen 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 Financial Statements of Financial Position. 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 Revenue within the Consolidated Financial Statements of Income. The equity earnings in these related investments was $1,945, $2,115 and $1,014 for the year ended December 31, 2014, 2013 and 2012, 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 will provide 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. The Company accounts for its investment in the joint venture with Parkmobile using the equity method of accounting. As a result of the deconsolidation, the Company recognized a pre-tax gain of $4,161, 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 Contribution of a Business to an Unconsolidated Entity within the Consolidated Statement of Income. The fair value of the investment in the joint venture with Parkmobile was determined using an income approach. The income approach required several assumptions including projected cash flows discounted using a rate approximating the cost of capital of the joint venture and is classified within level 3 of the fair value hierarchy. The equity earnings in the Parkmobile joint venture is 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 percent, ownership interest and the results of which are consolidated and included within in our consolidated financial statements.

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 settled. Income tax expense is the tax payable for the period plus the change during the period in deferred income taxes. We have certain state net operating loss carry forwards which expire in 2028. Our 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). We consider a number of factors in our assessment of the recoverability of our 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 our operating performance along with these considerations may significantly impact the amount of net operating losses ultimately recovered, and our assessment of their recoverability.

When evaluating our tax positions, we account for uncertainty in income taxes in our consolidated financial statements. The evaluation of a tax position is a two-step process, the first step being recognition. We determine 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 December 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-11, Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities. This update requires additional disclosures about offsetting and related arrangements on assets and liabilities to enable users of financial statements to understand the effect of such arrangements on an entity's financial position as reported. This amendment is effective for fiscal 2014 and retrospective application is required. The adoption of this guidance on January 1, 2014 did not have an impact to the Company's financial position, results of operations or cash flows or financial statement disclosures.

In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740), Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists to eliminate diversity in practice. Under this ASU, an unrecognized tax benefit, or a portion of an unrecognized tax benefit that exists at the reporting date, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if certain criteria are met. This amendment is effective for fiscal years and interim periods within those years beginning after December 15, 2013. The adoption of this guidance on January 1, 2014 did not have an impact to the Company's financial position, results of operations or cash flows or financial statement disclosures.

Accounting Pronouncements to be Adopted

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The amendments in ASU No. 2014-09 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, 2016. 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.

In June 2014, the FASB issued Accounting Standards Update (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 15 December 2015 and interim periods within those annual periods. Early adoption is permitted. The Company is currently assessing the impact on the Company's financial position, results of operations, cash flows and financial statement disclosures.