Summary of Significant Accounting Policies and Estimates (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the U.S. (“U.S. GAAP”) requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the balance sheet date and the amounts of revenues and expenses recognized during the reporting period. Management analyzes the Company’s estimates based on historical experience and various other assumptions that are believed to be reasonable under the circumstances; however, actual results could differ from such estimates. The significant estimates made by management in the accompanying Consolidated Financial Statements relate to inventory market adjustments, reserves for future chargebacks on finance and vehicle service contract fees, self-insured property/casualty insurance exposure, the fair value of assets acquired and liabilities assumed in business combinations, the valuation of goodwill and intangible franchise rights, and reserves for potential litigation.
Basis of Presentation	Basis of Presentation All business acquisitions completed during the periods presented have been accounted by applying the aquisition method of accounting, and their results of operations are included from the effective dates of the closings of the acquisitions. The allocations of purchase price to the assets acquired and liabilities assumed are assigned and recorded based on estimates of fair value and are subject to change within the purchase price allocation period (generally one year from the respective acquisition date). All intercompany balances and transactions have been eliminated in consolidation.
Revenue Recognition	Revenue Recognition Revenues from vehicle sales, parts sales and vehicle service are recognized upon completion of the sale or service and delivery to the customer. Conditions to completing a sale entail having an agreement with the customer, including pricing, and having a reasonable expectation that the sales price will be collected. The Company includes revenues from its collision center operations in parts and services sales. Taxes collected from customers and remitted to governmental agencies are not included in total revenues. The Company records the profit it receives for arranging vehicle fleet transactions, net, in other finance and insurance revenues. Since all sales of new vehicles must occur through franchised new vehicle dealerships, the dealerships effectively act as agents for the automobile manufacturers in completing sales of vehicles to fleet customers. As these customers typically order the vehicles, the Company has no significant general inventory risk. Additionally, fleet customers generally receive special purchase incentives from the automobile manufacturers and the Company receives only a nominal fee for facilitating the transactions. The Company arranges financing for customers through various institutions and receives financing fees based on the difference between the loan rates charged to customers and wholesale financing rates set by the financing institution. In addition, the Company receives fees from the sale of insurance and vehicle service contracts to customers. Revenues from these fees are recorded at the time of the sale of the vehicles as finance and insurance revenue earned. Further, through agreements with certain vehicle service contract administrators, the Company earns volume incentive rebates and interest income on reserves, as well as participates in the underwriting profits of the products. These amounts earned are also recognized as finance and insurance revenue. The Company may be charged back for unearned financing, insurance contract or vehicle service contract fees in the event of early termination of the contracts by customers. A reserve for future amounts estimated to be charged back is recorded, as a reduction of Finance, insurance and other revenue, net in the accompanying Consolidated Statement of Operations, based on the Company’s historical chargeback results and the termination provisions of the applicable contracts. While chargeback results vary depending on the type of contract sold, a 10% increase in the historical chargeback experience used in determining estimates of future amounts that might be charged back would have increased the reserve at December 31, 2017 by $5.0 million.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include demand deposits and various other short-term investments with original maturities of three months or less at the date of purchase. As of December 31, 2017 and 2016, cash and cash equivalents excluded $109.0 million and $85.1 million, respectively, of immediately available funds used to pay down the Floorplan Line of the Revolving Credit Facility and the FMCC Facility (as defined in Note 11, “Credit Facilities”), which are the Company’s primary options for the short-term investment of excess cash. These amounts are reflected in the Company’s Consolidated Balance Sheets as the offset accounts related to Floorplan Notes Payable - Credit Facility and Floorplan Notes Payable - Manufacturer Affiliates.
Contracts-in-Transit and Vehicle Receivables	Contracts-in-Transit and Vehicle Receivables Contracts-in-transit and vehicle receivables consist primarily of amounts due from financing institutions on retail finance contracts from vehicle sales and dealer incentives due from manufacturers. Also included are amounts receivable from vehicle wholesale sales.
Inventories	Inventories New, used and demonstrator vehicle inventories are carried at the lower of specific cost or net realizable value and are removed from inventory using the specific identification method in the Consolidated Balance Sheets. Vehicle inventory cost consists of the amount paid to acquire the inventory, plus the cost of reconditioning, cost of equipment added and transportation cost. Additionally, the Company receives interest assistance from some of the automobile manufacturers. This assistance is accounted for as a vehicle purchase price discount and is reflected as a reduction to the inventory cost on the Company’s Consolidated Balance Sheets and as a reduction to cost of sales in its Statements of Operations as the vehicles are sold. At December 31, 2017 and 2016, inventory cost had been reduced by $9.1 million and $9.6 million, respectively, for interest assistance received from manufacturers. New vehicle cost of sales was reduced by $48.9 million, $49.2 million and $50.5 million for interest assistance received related to vehicles sold for the years ended December 31, 2017, 2016 and 2015, respectively. The interest assistance over the past three years has ranged from approximately 88.0% of the Company’s quarterly floorplan interest expense in the first quarter of 2017 to 139.9% for the third quarter of 2015. Since the market value of inventory typically declines over time, the Company establishes new and used vehicle reserves based on its historical loss experience and management’s considerations of current market trends. These reserves are charged to cost of sales and reduce the carrying value of inventory on hand. Used vehicles are complex to value as there is no standardized source for determining exact values and each vehicle and each market in which the Company operates is unique. As a result, the value of each used vehicle taken at trade-in, or purchased at auction, is determined based on industry data, primarily accessed via the Company’s used vehicle management software and the industry expertise of the responsible used vehicle manager. Valuation risk is partially mitigated by the speed at which the Company turns this inventory. At December 31, 2017, the Company’s used vehicle days’ supply was 39 days. Parts and accessories inventories are valued at lower of cost (determined on a first-in, first-out basis) or net realizable value in the Consolidated Balance Sheets. The Company incurs shipping costs in connection with selling parts to customers. The cost of shipping these parts is included in cost of sales on the Consolidated Statements of Operations.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost and depreciation is provided using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are capitalized and amortized over the lesser of the estimated term of the lease or the estimated useful life of the asset. The amortization of assets recorded under capital leases is included with depreciation and amortization expense in the Consolidated Statement of Operations. Expenditures for major additions or improvements, which extend the useful lives of assets, are capitalized. Minor replacements, maintenance and repairs, which do not improve or extend the lives of the assets, are expensed as incurred. Disposals are removed at cost less accumulated depreciation, and any resulting gain or loss is reflected in current operations. The Company reviews long-lived assets that are held-for-use for impairment at the lowest level of identifiable cash flows whenever there is evidence that the carrying value of these assets may not be recoverable (i.e., triggering events). This review consists of comparing the carrying amount of the asset with its expected future undiscounted cash flows without interest costs. If the asset’s carrying amount is greater than such cash flow estimate, then it is required to be written down to its fair value. Estimates of expected future cash flows represent management’s best estimate based on currently available information and reasonable and supportable assumptions. See Note 15, “Asset Impairments,” for additional details regarding the Company’s impairment of long-lived assets.
Goodwill	Goodwill Goodwill represents the excess, at the date of acquisition, of the purchase price of the business acquired over the fair value of the net tangible and intangible assets acquired. During 2016, the Company was organized into four geographic regions, East and West regions in the U.S., the U.K. region and the Brazil region. During 2017, the Company reorganized into three geographic regions, the U.S. region, the U.K. region and the Brazil region. The Company has determined that each region represents a reporting unit for the purpose of assessing goodwill for impairment. Annually in the fourth quarter, based on the carrying values of the Company’s regions as of October 31^st, the Company performs a fair value and potential impairment assessment of its goodwill. An impairment analysis is done more frequently if certain events or circumstances arise that would indicate a change in the fair value of the intangible asset has occurred (i.e., an impairment indicator). In evaluating its goodwill, the Company compares the carrying value of the net assets of each reporting unit to its respective fair value, which is calculated by using unobservable inputs based upon the Company’s internally developed assumptions. This represents the first step of the impairment test. If the fair value of a reporting unit is less than the carrying value of its net assets, the Company proceeds to step two of the impairment test. Step two involves allocating the calculated fair value to all of the tangible and identifiable intangible assets of the reporting unit as if the calculated fair value were the purchase price in a business combination. The Company then compares the value of the implied goodwill resulting from this second step to the carrying value of the goodwill in the reporting unit. To the extent the carrying value of the goodwill exceeds its implied fair value under step two of the impairment test, a non-cash impairment charge equal to the difference is recorded. The Company uses a combination of the discounted cash flow, or income approach (80% weighted), and the market approach (20% weighted) to determine the fair value of the Company’s reporting units. Included in the discounted cash flow approach are assumptions regarding revenue growth rates, future gross margins, future selling, general and administrative expenses (“SG&A”) and an estimated weighted average cost of capital (“WACC”). The Company also must estimate residual values at the end of the forecast period and future capital expenditure requirements. Specifically, with regard to the valuation assumptions utilized in the income approach for the U.S. reporting unit (which represents the Company’s largest reporting unit) as of October 31, 2017, the Company based its analysis on an estimate of industry sales of 16.9 million units in 2018, 16.7 million units in 2019, 16.5 million units in 2020 and remaining flat for the remainder of the forecasted years. For the market approach, the Company utilizes recent market multiples of guideline companies for both revenue and pretax net income weighted as appropriate by reporting unit. Each of these assumptions requires the Company to use its knowledge of (1) the industry, (2) recent transactions and (3) reasonable performance expectations for its operations. If any one of the above assumptions change or fails to materialize, the resulting decline in the estimated fair value could result in a material, non-cash impairment charge to the goodwill associated with the reporting unit(s). See Note 15, “Asset Impairments,” and Note 16, “Intangible Franchise Rights and Goodwill,” for additional details regarding the Company’s goodwill.
Intangible Franchise Rights	Intangible Franchise Rights The Company’s only significant identifiable intangible assets, other than goodwill, are rights under franchise agreements with manufacturers, which are recorded at an individual dealership level. The Company expects these franchise agreements to continue for an indefinite period and, for agreements that do not have indefinite terms, the Company believes that renewal of these agreements can be obtained without substantial cost, based on the history with the manufacturer. As such, the Company believes that its franchise agreements will contribute to cash flows for an indefinite period and, therefore, the carrying amounts of the franchise rights are not amortized. Franchise rights acquired in business acquisitions prior to July 1, 2001, were recorded and amortized as part of goodwill in the U.S. reporting unit and remain as part of goodwill in the U.S. reporting unit at December 31, 2017 and 2016 in the accompanying Consolidated Balance Sheets. Since July 1, 2001, intangible franchise rights acquired in business combinations have been recorded as distinctly separate intangible assets. In accordance with guidance primarily codified within Accounting Standards Codification (“ASC”) 350, Intangibles-Goodwill and Other, the Company evaluates these franchise rights for impairment annually in the fourth quarter, based on the carrying values of the Company’s individual dealerships as of October 31^st, or more frequently if events or circumstances indicate possible impairment has occurred. In performing its impairment assessments, the Company tests the carrying value of each individual franchise right that was recorded by using a direct value method discounted cash flow model, or income approach, specifically the excess earnings method. Included in this analysis are assumptions, at a dealership level, regarding the cash flows directly attributable to the franchise rights, revenue growth rates, future gross margins and future SG&A expenses. Using an estimated WACC, estimated residual values at the end of the forecast period and estimated future capital expenditure requirements, the Company calculates the fair value of each dealership’s franchise rights. See Note 15, “Asset Impairments,” and Note 16, “Intangible Franchise Rights and Goodwill,” for additional details regarding the Company’s intangible franchise rights.
Income Taxes	Income Taxes Currently, the Company operates in 15 different states in the U.S., in the U.K. and in Brazil, each of which has unique tax rates and payment calculations. As the amount of income generated in each jurisdiction varies from period to period, the Company’s estimated effective tax rate can vary based on the proportion of taxable income generated in each jurisdiction. The Company follows the liability method of accounting for income taxes in accordance with ASC 740, Income Taxes. Under this method, deferred income taxes are recorded based on differences between the financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the underlying assets are realized or liabilities are settled. A valuation allowance reduces deferred tax assets when it is more likely than not that some or all of the deferred tax assets will not be realized. The Company has recognized deferred tax assets, net of valuation allowances, that it believes will be realized, based primarily on the assumption of future taxable income. As it relates to U.S. state net operating losses, as well as deferred tax assets primarily relating to net operating losses and goodwill for certain Brazil subsidiaries, a corresponding valuation allowance has been established to the extent that the Company has determined that net income attributable to certain jurisdictions may not be sufficient to realize the benefit.
Fair Value of Financial Assets and Liabilities	Fair Value of Financial Assets and Liabilities The Company’s financial instruments consist primarily of cash and cash equivalents, contracts-in-transit and vehicle receivables, accounts and notes receivable, accounts payable, credit facilities, long-term debt and interest rate derivative instruments. The fair values of cash and cash equivalents, contracts-in-transit and vehicle receivables, accounts and notes receivable, accounts payable, credit facilities and variable-rate long-term debt approximate their carrying values due to the short-term nature of these instruments and/or the existence of variable interest rates. However, the carrying value of the Company’s fixed-rate long-term debt differs from fair value. For discussion on the fair value of the Company’s interest rate derivative instruments and fixed-rate long-term debt, refer to “Derivative Financial Instruments” and Note 12, “Long-Term Debt” below, respectively.
Fair Value of Assets Acquired and Liabilities Assumed	Fair Value of Assets Acquired and Liabilities Assumed in Business Combinations The fair values of assets acquired and liabilities assumed in business combinations are estimated using various assumptions. The most significant assumptions, and those requiring the most judgment, involve the estimated fair values of property and equipment and intangible franchise rights. The Company utilizes third-party experts to determine the fair values of property and equipment purchased, including real estate, and utilizes its fair value model as discussed under “Intangible Franchise Rights” above, supplemented with assistance from third-party experts, to determine the fair value of intangible franchise rights acquired.
Foreign Currency Translation	Foreign Currency Translation The functional currency for the Company’s U.K. subsidiaries is the British pound sterling (£) and of the Company’s Brazil subsidiaries is the Brazilian real (R$). The financial statements of all the Company’s foreign subsidiaries have been translated into U.S. dollars. All assets and liabilities of foreign subsidiaries are translated into U.S. dollars using period-end exchange rates and all revenues and expenses are translated at average rates during the respective period. The difference in the U.S. dollar results that arise from the translation of all assets and liabilities are included in the cumulative currency translation adjustments in accumulated other comprehensive income/loss in stockholders’ equity and in other income/expense, when applicable. Upon disposition of the Company’s investment in a foreign subsidiary, the Company removes the accumulated translation adjustment attributable to that subsidiary from equity and recognizes it through earnings as a part of the gain or loss on the disposition transaction.
Derivative Financial Instruments	Derivative Financial Instruments One of the Company’s primary market risk exposures is increasing interest rates. Interest rate derivatives, designated as cash flow hedges, are used to adjust interest rate exposures, when determined appropriate based on current and forecasted future market conditions. The Company follows the requirements of guidance primarily codified within ASC 815, Derivatives and Hedging (“ASC 815”) pertaining to the accounting for derivatives and hedging activities. ASC 815 requires the Company to recognize all cash flow hedges on its balance sheet at fair value. The related gains or losses on these interest rate derivatives are deferred in stockholders’ equity as a component of accumulated other comprehensive loss. These deferred gains and losses are recognized in income in the period in which the related items being hedged are recognized in expense. Monthly contractual settlements of these swap positions are recognized as floorplan or other interest expense in the Company’s accompanying Consolidated Statements of Operations. However, to the extent that the change in value of a derivative contract does not perfectly offset the change in the value of the items being hedged, that ineffective portion is immediately recognized in other income or expense. All of the Company’s interest rate hedges were designated as cash flow hedges and were deemed to be effective at December 31, 2017, 2016 and 2015. The Company measures the fair value of its interest rate derivative instruments utilizing an income approach valuation technique, converting estimated future amounts of cash flows to a single present value in order to obtain a transfer exit price within the bid and ask spread that is most representative of the fair value of its derivative instruments. In measuring fair value, the Company utilizes the option-pricing Black-Scholes present value technique for all of its derivative instruments. This option-pricing technique utilizes a one-month London Interbank Offered Rate (“LIBOR”) forward yield curve, obtained from an independent external service provider, matched to the identical maturity term of the instrument being measured. Observable inputs utilized in the income approach valuation technique incorporate identical contractual notional amounts, fixed coupon rates, periodic terms for interest payments and contract maturity. The fair value estimate of the interest rate derivative instruments also considers the credit risk of the Company for instruments in a liability position or the counterparty for instruments in an asset position. The credit risk is calculated by using the spread between the one-month LIBOR yield curve and the relevant average 10 and 20-year rate according to Standard and Poor’s. The Company has determined the valuation measurement inputs of these derivative instruments to maximize the use of observable inputs that market participants would use in pricing similar or identical instruments and market data obtained from independent sources, which is readily observable or can be corroborated by observable market data for substantially the full term of the derivative instrument. Further, the valuation measurement inputs minimize the use of unobservable inputs. Accordingly, the Company has classified the derivatives within Level 2 of the ASC 820, Fair Value Measurement and Disclosures (“ASC 820”), hierarchy framework in Note 13, “Fair Value Measurements.” The Company validates the outputs of its valuation technique by comparison to valuations from the respective counterparties. See Note 4, “Derivative Instruments and Risk Management Activities,” and Note 13, “Fair Value Measurements,” for further details regarding the Company’s derivative financial instruments and fair value measurements.
Factory Incentives	Factory Incentives In addition to the interest assistance discussed above, the Company receives various dealer incentive payments from certain of the automobile manufacturers. These incentive payments are typically received on parts purchases from the automobile manufacturers and on new vehicle retail sales. These incentives are reflected as reductions of cost of sales in the Consolidated Statements of Operations.
Earnings Per Share	Earnings Per Share The Company utilizes the two-class method for the computation of earnings per share (“EPS”). The two-class method requires a portion of net income to be allocated to participating securities, which are unvested awards of share-based payments with non-forfeitable rights to receive dividends or dividend equivalents. The Company’s restricted stock awards qualify as participating securities as each contain non-forfeitable rights to dividends. Income allocated to these participating securities is excluded from net earnings available to common shares. Basic EPS is computed by dividing net income available to basic common shares by the weighted average number of basic common shares outstanding during the period. Diluted EPS is computed by dividing net income available to diluted common shares by the weighted average number of dilutive common shares outstanding during the period.
Advertising	Advertising The Company expenses the costs of advertising as incurred. Advertising expense for the years ended December 31, 2017, 2016, and 2015, totaled $74.1 million, $75.3 million and $74.6 million, respectively. The Company receives advertising assistance from some of the automobile manufacturers that the Company must spend on qualified advertising and is subject to audit and chargeback by the manufacturer. The assistance is accounted for as a reduction of advertising expense, which is included in SG&A expenses in the accompanying Consolidated Statements of Operations, as the assistance is earned. Advertising assistance amounts received related to vehicles still in inventory as of the balance sheet date are reflected in accrued expenses. Advertising expense has been reduced by $15.3 million, $16.7 million and $17.3 million for advertising assistance earned related to vehicles sold for the years ended December 31, 2017, 2016 and 2015, respectively.
Business and Credit Risk Concentrations	Business and Credit Risk Concentrations The Company owns and operates franchised automotive dealerships in the U.S., the U.K. and Brazil. Automotive dealerships operate pursuant to franchise agreements with vehicle manufacturers. Franchise agreements generally provide the manufacturers or distributors with considerable influence over the operations of the dealership. The success of any franchised automotive dealership is dependent, to a large extent, on the financial condition, management, marketing, production and distribution capabilities of the vehicle manufacturers or distributors of which the Company holds franchises. The Company purchases substantially all of its new vehicles from various manufacturers or distributors at the prevailing prices to all franchised dealers. The Company’s sales volume could be adversely impacted by the manufacturers’ or distributors’ inability to supply the dealerships with an adequate supply of vehicles. For the year ended December 31, 2017, Toyota (including Lexus, Scion and Toyota brands), Volkswagen (including Audi, Porsche, and Volkswagen brands), BMW (including MINI and BMW brands), Ford (including Ford and Lincoln brands), Honda (including Acura and Honda brands), Nissan, General Motors (including Chevrolet, GMC, Buick, and Cadillac brands), Daimler (including Mercedes-Benz, smart and Sprinter brands), Hyundai (including Hyundai and Kia brands) and FCA US (formerly Chrysler) (including Chrysler, Dodge, RAM and Jeep brands), accounted for 25.3%, 13.0%, 12.7%, 11.5%, 9.2%, 7.4%, 6.2%, 4%, 3.9%, and 3.9% of the Company’s new vehicle sales volume, respectively. No other manufacturer accounted for more than 2.9% of the Company’s total new vehicle sales volume in 2017. Through the use of an open account, the Company purchases and returns parts and accessories from/to the manufacturers and receives reimbursement for rebates, incentives and other earned credits. As of December 31, 2017, the Company was due $109.6 million from various manufacturers (see Note 8, “Accounts and Notes Receivable”). Receivable balances from Toyota, General Motors, BMW, Volkswagen, Daimler, Ford, Nissan, Hyundai, Honda, and FCA US (formerly Chrysler), represented 16.6%, 14.1%, 14.0%, 13.5%, 11.2%, 9.0%, 5.0%, 3.8%, 3.4% and 3.2%, respectively, of this total balance due from manufacturers.
Statements of Cash Flows	Statements of Cash Flows With respect to all new vehicle floorplan borrowings, the manufacturers of the vehicles draft the Company’s credit facilities directly with no cash flow to or from the Company. With respect to borrowings for used vehicle financing in the U.S., the Company finances up to 85% of the value of the used vehicle inventory and the funds flow directly to the Company from the lender. In the U.K. and Brazil, the Company chooses which used vehicles to finance and the borrowings flow directly to the Company from the lender. All borrowings from, and repayments to, lenders affiliated with the vehicle manufacturers (excluding the cash flows from or to manufacturer affiliated lenders participating in the Company’s syndicated lending group under the Revolving Credit Facility) are presented within Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows. All borrowings from, and repayments to, the syndicated lending group under the Revolving Credit Facility (as defined in Note 11, “Credit Facilities”) (including the cash flows from or to manufacturer affiliated lenders participating in the facility), as well as borrowing from, and repayments to, the Company’s other credit facilities are presented within Cash Flows from Financing Activities. Cash paid for interest, including the monthly settlement of the Company’s interest rate derivatives, was $117.1 million, $109.3 million and $92 million in 2017, 2016 and 2015, respectively. Cash paid for taxes, net of refunds, was $61.0 million, $56.9 million and $74.8 million in 2017, 2016 and 2015, respectively.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation represents the expense related to stock-based awards granted to employees and non-employee directors. The Company measures stock-based compensation expense at grant date based on the estimated fair value of the award and recognizes the cost on a straight-line basis, net of estimated forfeitures, over the employee requisite service period. The Company estimates the fair value of its employee stock purchase rights issued pursuant to the Employee Stock Purchase Plan using a Black-Scholes valuation model. The expense for stock-based awards is recognized as an SG&A expense in the accompanying Consolidated Statement of Operations.
Business Segment Information	Business Segment Information The Company, through its regions, conducts business in the automotive retailing industry, including selling new and used cars and light trucks, arranging related vehicle financing, selling service and insurance contracts, providing automotive maintenance and repair services and selling vehicle parts. The Company has three reportable segments: the U.S., which includes the activities of the Company’s corporate office, the U.K., and Brazil. The reportable segments are the business activities of the Company for which discrete financial information is available and for which operating results are regularly reviewed by its chief operating decision maker to allocate resources and assess performance. The Company’s chief operating decision maker is its Chief Executive Officer. See Note 20, “Segment Information,” for additional details regarding the Company’s reportable segments.
Self-Insured Medical, Property and Casualty Reserves	Self-Insured Medical, Property and Casualty Reserves The Company purchases insurance policies for worker’s compensation, liability, auto physical damage, property, pollution, employee medical benefits and other risks consisting of large deductibles and/or self-insured retentions. The Company’s U.S. auto physical damage insurance coverage is composed of a $10.0 million per occurrence company deductible with an annual maximum aggregate deductible of $30.0 million with no maximum payout. Under the Company’s U.S. workers’ compensation and general liability insurance coverage, its exposure per claim is limited to $1.0 million per occurrence, with unlimited exposure on the number of claims up to $1.0 million that may be incurred. As of December 31, 2017, the Company had accrued $20.5 million for its estimated liability on incurred workers’ compensation and general liability claims
Consolidation, Variable Interest Entity, Policy
New Accounting Pronouncements, Policy	the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. The amendments in the accounting standard replaced the lower of cost or market test with a lower of cost and net realizable value test. The amendments in this ASU were to be applied prospectively and were effective for interim and annual periods beginning after December 15, 2016. The Company adopted ASU 2015-11 during the first quarter of 2017. The adoption of this ASU did not materially impact its consolidated financial statements or results of operations. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendment addresses several aspects of the accounting for share-based payment award transactions, including: income tax consequences; classification of awards as either equity or liabilities; and classification on the statement of cash flows. The Company adopted ASU 2016-09 during the first quarter of 2017. The adoption of this ASU did not materially impact its consolidated financial statements or results of operations. Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) that amends the accounting guidance on revenue recognition. The amendments in this ASU are intended to provide a framework for addressing revenue issues, improve comparability of revenue recognition practices, and improve disclosure requirements. This ASU sets forth a five-step model for determining when and how revenue is recognized. Under the model, an entity will be required to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. The amendments in this accounting standard update are effective for interim and annual reporting periods beginning after December 15, 2017. The standard can be adopted either retrospectively to each reporting period presented or as a cumulative effect adjustment as of the date of adoption. To assess the impact of the ASU, the Company established an internal implementation team to review its current accounting policies and practices, identify all material revenue streams, assess the impact of the ASU on its material revenue streams and identify potential differences with current policies and practices. The team identified the Company’s material revenue streams to be the sale of new and used vehicles; arrangement of associated vehicle financing and the sale of service and other insurance contracts; the performance of vehicle maintenance and repair services; and the sale of vehicle parts. The team reviewed a sample of contracts and other related documents associated with each revenue stream in each region. Based upon this review and application within the ASU, the team has concluded that no changes to the timing of revenue recognition for the sale of new and used vehicles, as well as parts are necessary. As it relates to vehicle maintenance and repair services, the team identified a change in the Company’s accounting policies and procedures. Through December 31, 2017, the Company has recognized revenue once the maintenance or repair services are completed and the vehicle is delivered to the customer. Under the new standard, the team has determined that the Company has an enforceable right to payment during the course of the work being performed and, thus, will be required to recognize revenue over time as the maintenance and repair services are performed. With regards to the revenue generated from the arrangement of vehicle financing and the sale of service and other insurance contracts, the team also identified a change in the Company’s accounting policies and procedures. Generally, the Company receives an upfront commission for these transactions from the finance or insurance provider and recognizes the associated revenue when the contract is executed. In some cases, the Company also earns retrospective commission income by participating in the future profitability of the portfolio of contracts sold by the Company. Through December 31, 2017, the Company’s accounting policy was to recognize the retrospective commission income as the amounts were determined and realized. The team has concluded that this retrospective commission income represents variable consideration for which the Company’s performance obligation is satisfied when the contract is executed. Under the new standard, an estimate of variable consideration, subject to a constraint, is to be included in the transaction price and recognized when or as the performance obligation is satisfied. Therefore, the Company’s accounting policy must change under the new ASU such that the Company will estimate the amount of future earnings that it will realize from the ultimate profitability of the portfolio and recognize such estimate, subject to any constraint in the estimate, upfront when the contract is executed. Changes in the Company’s estimates of the amount of variable consideration to be ultimately realized will be adjusted through revenue as determined. The Company will adopt the amendments of this ASU during the first fiscal quarter of 2018, using the modified retrospective approach. As a result of adopting the new standard and implementing the changes aforementioned, the Company expects the net, after-tax cumulative effect adjustment to increase retained earnings as of the date of adoption. The Company is in the process of finalizing its estimate of the cumulative effect adjustment, pending certain data and considerations of the appropriate level of constraint. The Company expects to complete its calculation in the first quarter of adoption. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The amendments in this ASU relate to the accounting for leasing transactions. This standard requires a lessee to record on the balance sheet the assets and liabilities for the rights and obligations created by leases with lease terms of more than 12 months. In addition, this standard requires both lessees and lessors to disclose certain key information about lease transactions. This standard will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is in the process of evaluating the impact that adoption will have on its consolidated balance sheet and statement of income. However, the Company expects that the adoption of the provisions of the ASU will have a significant impact on its consolidated balance sheet, as currently approximately half of its real estate is rented, not owned, via operating leases. Adoption of this ASU is required to be done using a modified retrospective approach. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendment replaces the current incurred loss impairment methodology of recognizing credit losses when a loss is probable, with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to assess credit loss estimates. The standard will be effective for fiscal years beginning after December 15, 2019, with early adoption permitted for periods after December 15, 2018. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements or results of operations, but does not expect the amendments in this ASU to materially impact its consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendment addresses several specific cash flow issues with the objective of reducing the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The standard will be effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, a consensus of the FASB Emerging Issues Task Force ("EITF"). The amendments require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this ASU do not provide a definition of restricted cash or restricted cash equivalents. The standard will be effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The amendments in this update clarify the definition of a business in order to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this ASU should be applied prospectively and are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact on its consolidated financial statements as it will depend on the facts and circumstances of any specific future transactions. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendment eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit's carrying amount over its fair value. The amendments in this update should be applied prospectively and are effective for interim and annual periods beginning after December 15, 2019. Earlier application is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The impact of the adoption of the provisions of the ASU on the Company’s consolidated financial statements will depend upon the significance of future impairments realized. In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. The amendments in this update provide clarity and reduce both diversity in practice and cost and complexity when applying the guidance of Topic 718 to a change to the terms or conditions of a share-based payment award. Under the new guidance, an entity will not apply modification accounting to a share-based payment award if all of the following are the same immediately before and after the change: 1) the award's fair value (or calculated value or intrinsic value, if those measurement methods are used), 2) the award's vesting conditions, and 3) the award's classification as an equity or liability instrument. The amendments in this ASU should be applied prospectively and are effective for fiscal years beginning after December 15, 2017, with early adoption permitted. The Company is currently evaluating the impact on its consolidated financial statements as it will depend on the facts and circumstances of any specific future transactions. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 715): Targeted Improvements to Accounting for Hedging Activities. The amendments in this update better align an entity's risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also eases the administrative burden of hedge documentation requirements and assessing hedge effectiveness. The amendments to cash flow and net investment hedge relationships should be applied using a modified retrospective approach while the presentation and disclosure requirements are applied prospectively, effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements.