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Summary of Significant Accounting Policies | 9 Months Ended | 12 Months Ended
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Sep. 30, 2013 | Dec. 31, 2012
Accounting Policies [Abstract] |  |
Summary of Significant Accounting Policies | Financial Statement Information Revenue Recognition The majority of our revenue is derived from the sale of vehicle parts. Revenue is recognized when the products are shipped, delivered to or picked up by customers and title has transferred, subject to an allowance for estimated returns, discounts and allowances that we estimate based upon historical information. We recorded a reserve for estimated returns, discounts and allowances of $30.5 million and $24.7 million at September 30, 2013 and December 31, 2012, respectively. We present taxes assessed by governmental authorities collected from customers on a net basis. Therefore, the taxes are excluded from revenue on our Unaudited Consolidated Condensed Statements of Income and are shown as a current liability on our Unaudited Consolidated Condensed Balance Sheets until remitted. We recognize revenue from the sale of scrap, cores and other metals when title has transferred, which typically occurs upon delivery to the customer. Receivables We recorded a reserve for uncollectible accounts of $14.1 million and $9.5 million at September 30, 2013 and December 31, 2012, respectively. Inventory Inventory consists of the following (in thousands):
| September 30, 2013 |  | December 31, 2012
Aftermarket and refurbished products | $ | 649,768 |  |  | $ | 523,677 |
Salvage and remanufactured products | 368,401 |  |  | 377,126 |
| $ | 1,018,169 |  |  | $ | 900,803 |
Intangible Assets Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer relationships and covenants not to compete. The change in the carrying amount of goodwill by reportable segment during the nine months ended September 30, 2013 is as follows (in thousands):
| North America |  | Europe |  | Total
Balance as of January 1, 2013 | $ | 1,339,831 |  |  | $ | 350,453 |  |  | $ | 1,690,284 |
Business acquisitions and adjustments to previously recorded goodwill | 17,623 |  |  | 209,638 |  |  | 227,261 |
Exchange rate effects | (4,407 | ) |  | 7,778 |  |  | 3,371 |
Balance as of September 30, 2013 | $ | 1,353,047 |  |  | $ | 567,869 |  |  | $ | 1,920,916 |
The components of other intangibles are as follows (in thousands):
| September 30, 2013 |  | December 31, 2012
| Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Trade names and trademarks | $ | 144,254 |  |  | $ | (26,167 | ) |  | $ | 118,087 |  |  | $ | 118,422 |  |  | $ | (21,599 | ) |  | $ | 96,823 |
Customer relationships | 45,252 |  |  | (10,616 | ) |  | 34,636 |  |  | 14,426 |  |  | (6,642 | ) |  | 7,784 |
Covenants not to compete | 3,822 |  |  | (2,116 | ) |  | 1,706 |  |  | 3,654 |  |  | (1,546 | ) |  | 2,108 |
| $ | 193,328 |  |  | $ | (38,899 | ) |  | $ | 154,429 |  |  | $ | 136,502 |  |  | $ | (29,787 | ) |  | $ | 106,715 |
During the nine months ended September 30, 2013, we recorded $24.7 million of trade names and $25.3 million of customer relationships for our acquisition of Sator Beheer B.V. ("Sator") as discussed in Note 9, "Business Combinations." Trade names and trademarks are amortized over a useful life ranging from 10 to 30 years on a straight-line basis. Customer relationships are amortized over the expected period to be benefited (5 to 15 years) on either a straight-line or accelerated basis. Covenants not to compete are amortized over the lives of the respective agreements, which range from one to five years, on a straight-line basis. Amortization expense for intangibles was $9.0 million and $7.1 million during the nine month periods ended September 30, 2013 and 2012, respectively. Estimated amortization expense for each of the five years in the period ending December 31, 2017 is $13.0 million, $14.2 million, $12.8 million, $11.4 million and $10.5 million, respectively. Investment in Unconsolidated Subsidiary In August 2013, we entered into an agreement with Suncorp Group, a leading general insurance group in Australia and New Zealand, to develop an alternative vehicle replacement parts business in those countries. We hold a 49% equity interest in the entity and will contribute our experience to help establish automotive parts recycling operations and to facilitate the procurement of aftermarket parts; Suncorp Group holds a 51% equity interest and will supply salvage vehicles to the venture as well as assist in establishing relationships with repair shops as customers. We are accounting for our interest in this subsidiary using the equity method of accounting, as our investment gives us the ability to exercise significant influence, but not control, over the investee. The total of our investment in the equity-method investee is included within Other Assets on our Unaudited Consolidated Condensed Balance Sheets. As of September 30, 2013, the carrying value of our investment in this unconsolidated subsidiary was $9.3 million. Our equity in the net earnings of the investee for the three months ended September 30, 2013 was not material. Depreciation Expense Included in Cost of Goods Sold on the Unaudited Consolidated Condensed Statements of Income is depreciation expense associated with our refurbishing, remanufacturing, and furnace operations and our distribution centers. Warranty Reserve Some of our salvage mechanical products are sold with a standard six month warranty against defects. Additionally, some of our remanufactured engines are sold with a standard three year warranty against defects. We also provide a limited lifetime warranty for certain of our aftermarket products. We record the estimated warranty costs at the time of sale using historical warranty claim information to project future warranty claims activity. The changes in the warranty reserve during the nine month period ended September 30, 2013 were as follows (in thousands):
Balance as of January 1, 2013 | $ | 10,574 |
Warranty expense | 22,652 |
Warranty claims | (21,109 | )
Balance as of September 30, 2013 | $ | 12,117 |
For an additional fee, we also sell extended warranty contracts for certain mechanical products. The expense related to extended warranty claims is recognized when the claim is made. Recent Accounting Pronouncements Effective January 1, 2013, we adopted the Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." This update requires disclosure of amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. The update does not change the items reported in other comprehensive income or when an item of other comprehensive income is reclassified to net income. As this guidance only revises the presentation and disclosures related to the reclassification of items out of accumulated other comprehensive income, the adoption of this guidance did not affect our financial position, results of operations or cash flows. See Note 12, "Accumulated Other Comprehensive Income" for the additional required disclosures. | Summary of Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements include the accounts of LKQ Corporation and its subsidiaries. All intercompany transactions and accounts have been eliminated. Use of Estimates In preparing our financial statements in conformity with accounting principles generally accepted in the United States we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Revenue Recognition The majority of our revenue is derived from the sale of vehicle parts. Revenue is recognized when the products are shipped or picked up by customers and title has transferred, subject to an allowance for estimated returns, discounts and allowances that we estimate based upon historical information. We recorded a reserve for estimated returns, discounts and allowances of approximately $24.7 million and $22.8 million at December 31, 2012 and 2011, respectively. We present taxes assessed by governmental authorities collected from customers on a net basis. Therefore, the taxes are excluded from revenue on our Consolidated Statements of Income and are shown as a current liability on our Consolidated Balance Sheets until remitted. Revenue from the sale of separately-priced extended warranty contracts is reported as deferred revenue and recognized ratably over the term of the contracts or three years in the case of lifetime warranties. We recognize revenue from the sale of scrap, cores and other metals when title has transferred, which typically occurs upon delivery to the customer. Shipping & Handling Revenue also includes amounts billed to customers related to shipping and handling of approximately $25.6 million, $23.9 million and $17.3 million during the years ended December 31, 2012, 2011 and 2010, respectively. Distribution expenses in the accompanying Consolidated Statements of Income are the costs incurred to prepare and deliver products to customers. Receivables and Allowance for Doubtful Accounts In the normal course of business, we extend credit to customers after a review of each customer's credit history. We recorded a reserve for uncollectible accounts of approximately $9.5 million and $8.3 million at December 31, 2012 and 2011, respectively. The reserve is based upon the aging of the accounts receivable, our assessment of the collectability of specific customer accounts and historical experience. Receivables are written off once collection efforts have been exhausted. Recoveries of receivables previously written off are recorded when received. Concentrations of Credit Risk Financial instruments that potentially subject us to significant concentration of credit risk consist primarily of cash and equivalents and accounts receivable. We control our exposure to credit risk associated with these instruments by (i) placing our cash and equivalents with several major financial institutions; (ii) holding high-quality financial instruments; and (iii) maintaining strict policies over credit extension that include credit evaluations, credit limits and monitoring procedures. In addition, our overall credit risk with respect to accounts receivable is limited to some extent because our customer base is composed of a large number of geographically diverse customers. Inventory We classify our inventory into the following categories: aftermarket and refurbished vehicle replacement products; and salvage and remanufactured vehicle replacement products. This classification reflects the historically distinct distribution channels used in the sale of alternative repair products in North America, although we continue to work toward integrating these distribution channels. An aftermarket product is a new vehicle product manufactured by a company other than the original equipment manufacturer. Cost is established based on the average price we pay for parts, and includes expenses incurred for freight and overhead costs. For items purchased from foreign companies, import fees and duties and transportation insurance are also included. Refurbished inventory cost is based on the average price we pay for cores, which are recycled automotive parts that are not suitable for sale as a replacement part without further processing. The cost of our refurbished inventory also includes expenses incurred for freight, labor and other overhead. A salvage product is a recycled vehicle part suitable for sale as a replacement part. Cost is established based upon the price we pay for a vehicle, including auction, storage and towing fees, as well as expenditures for buying and dismantling. Inventory carrying value is determined using the average cost to sales percentage at each of our facilities and applying that percentage to the facility's inventory at expected selling prices. The average cost to sales percentage is derived from each facility's historical vehicle profitability for salvage vehicles purchased at auction or from contracted rates for salvage vehicles acquired under certain direct procurement arrangements. Remanufactured inventory cost is based upon the price paid for cores, and also includes expenses incurred for freight, direct manufacturing costs and overhead. For all inventory, carrying value is recorded at the lower of cost or market and is reduced to reflect the age of the inventory and current anticipated demand. If actual demand differs from our estimates, additional reductions to inventory carrying value would be necessary in the period such determination is made. Inventory consists of the following (in thousands):
| December 31,
| 2012 |  | 2011
Aftermarket and refurbished products | $ | 523,677 |  |  | $ | 445,787 |
Salvage and remanufactured products | 377,126 |  |  | 291,059 |
| $ | 900,803 |  |  | $ | 736,846 |
Property and Equipment Property and equipment are recorded at cost. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. The internal and external costs incurred to develop internal use computer software during the application development stage of the implementation, including the design of the chosen path, are capitalized. Other costs, including expenses incurred during the preliminary project stage, training expenses, data conversion costs and expenses incurred in the post implementation stage are expensed in the period incurred. Capitalized costs are amortized ratably over the useful life of the software when the software becomes operational. Upgrades and enhancements to internal use software are capitalized only if the costs result in additional functionality. We do not plan to sell or market our internal use computer software to third parties. Our estimated useful lives are as follows:
Land improvements | 10-20 years
Buildings and improvements | 20-40 years
Furniture, fixtures and equipment | 3-20 years
Computer equipment and software | 3-10 years
Vehicles and trailers | 3-10 years
Property and equipment consists of the following (in thousands):
| December 31,
| 2012 |  | 2011
Land and improvements | $ | 87,720 |  |  | $ | 81,170 |
Buildings and improvements | 133,368 |  |  | 119,414 |
Furniture, fixtures and equipment | 243,565 |  |  | 192,514 |
Computer equipment and software | 91,588 |  |  | 79,195 |
Vehicles and trailers | 51,187 |  |  | 40,825 |
Leasehold improvements | 91,280 |  |  | 69,079 |
| 698,708 |  |  | 582,197 |
Less—Accumulated depreciation | (231,130 | ) |  | (179,950 | )
Construction in progress | 26,801 |  |  | 21,851 |
| $ | 494,379 |  |  | $ | 424,098 |
Intangibles Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer relationships and covenants not to compete. Goodwill is tested for impairment at least annually, and we performed annual impairment tests during the fourth quarters of 2012, 2011 and 2010. The results of all of these tests indicated that goodwill was not impaired. The changes in the carrying amount of goodwill by reportable segment are as follows (in thousands):
| North America |  | Europe |  | Total
Balance as of January 1, 2010 | $ | 938,783 |  |  | $ | — |  |  | $ | 938,783 |
Business acquisitions and adjustments to previously recorded goodwill | 91,757 |  |  | — |  |  | 91,757 |
Exchange rate effects | 2,433 |  |  | — |  |  | 2,433 |
Balance as of December 31, 2010 | $ | 1,032,973 |  |  | $ | — |  |  | $ | 1,032,973 |
Business acquisitions and adjustments to previously recorded goodwill | 105,177 |  |  | 337,031 |  |  | 442,208 |
Exchange rate effects | (1,520 | ) |  | 2,402 |  |  | 882 |
Balance as of December 31, 2011 | $ | 1,136,630 |  |  | $ | 339,433 |  |  | $ | 1,476,063 |
Business acquisitions and adjustments to previously recorded goodwill | 201,742 |  |  | (4,140 | ) |  | 197,602 |
Exchange rate effects | 1,459 |  |  | 15,160 |  |  | 16,619 |
Balance as of December 31, 2012 | $ | 1,339,831 |  |  | $ | 350,453 |  |  | $ | 1,690,284 |
In 2011 and 2012, we finalized the valuation of certain intangible assets acquired related to our 2010 and 2011 acquisitions, respectively. As these adjustments did not have a material impact on our financial position or results of operations, we recorded these adjustments to goodwill and amortization expense in 2011 and 2012, respectively. The components of other intangibles are as follows (in thousands):
| December 31, 2012 |  | December 31, 2011
| Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Trade names and trademarks | $ | 118,422 |  |  | $ | (21,599 | ) |  | $ | 96,823 |  |  | $ | 115,954 |  |  | $ | (16,305 | ) |  | $ | 99,649 |
Customer relationships | 14,426 |  |  | (6,642 | ) |  | 7,784 |  |  | 10,050 |  |  | (3,065 | ) |  | 6,985 |
Covenants not to compete | 3,654 |  |  | (1,546 | ) |  | 2,108 |  |  | 3,194 |  |  | (918 | ) |  | 2,276 |
| $ | 136,502 |  |  | $ | (29,787 | ) |  | $ | 106,715 |  |  | $ | 129,198 |  |  | $ | (20,288 | ) |  | $ | 108,910 |
In 2012, we recorded $0.6 million of trade names, $4.1 million of customer relationships and $0.6 million of covenants not to compete resulting from our 2012 acquisitions and adjustments to certain preliminary intangible asset valuations from our 2011 acquisitions. In 2011, we recorded $40.1 million of trade names, $5.7 million of customer relationships and $1.5 million of covenants not to compete resulting from our 2011 acquisitions and adjustments to certain preliminary intangible asset valuations from our 2010 acquisitions. The trade names recorded in 2011 included $39.3 million for the Euro Car Parts trade name related to our acquisition of Euro Car Parts Holdings Limited (“ECP”) effective October 1, 2011. Trade names and trademarks are amortized over a useful life ranging from 10 to 30 years on a straight-line basis. Customer relationships are amortized over the expected period to be benefited (5 to 10 years) on either a straight-line or accelerated basis. Covenants not to compete are amortized over the lives of the respective agreements, which range from one to five years, on a straight-line basis. Amortization expense for intangibles was $9.5 million, $7.9 million and $4.2 million during the years ended December 31, 2012, 2011 and 2010, respectively. Estimated amortization expense for each of the five years in the period ending December 31, 2017 is $8.8 million, $7.9 million, $7.1 million, $6.3 million and $6.0 million, respectively. Impairment of Long-Lived Assets Long-lived assets are reviewed for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. If such review indicates that the carrying amount of long-lived assets is not recoverable, the carrying amount of such assets is reduced to fair value. There were no material adjustments to the carrying value of long-lived assets of continuing operations during the years ended December 31, 2012, 2011 or 2010. Product Warranties Some of our salvage mechanical products are sold with a standard six month warranty against defects. Additionally, some of our remanufactured engines are sold with a standard three year warranty against defects. We also provide a limited lifetime warranty for certain of our aftermarket products. We record the estimated warranty costs at the time of sale using historical warranty claim information to project future warranty claims activity. The changes in the warranty reserve are as follows (in thousands):
Balance as of January 1, 2011 | $ | 2,063 |
Warranty expense | 22,364 |
Warranty claims | (20,802 | )
Business acquisitions | 3,722 |
Balance as of December 31, 2011 | $ | 7,347 |
Warranty expense | 29,628 |
Warranty claims | (27,514 | )
Business acquisitions | 1,113 |
Balance as of December 31, 2012 | $ | 10,574 |
For an additional fee, we also sell extended warranty contracts for certain mechanical products. The expense related to extended warranty claims is recognized when the claim is made. Self-Insurance Reserves We self-insure a portion of employee medical benefits under the terms of our employee health insurance program. We purchase certain stop-loss insurance to limit our liability exposure. We also self-insure a portion of our property and casualty risk, which includes automobile liability, general liability, directors and officers liability, workers' compensation and property coverage, under deductible insurance programs. The insurance premium costs are expensed over the contract periods. A reserve for liabilities associated with these losses is established for claims filed and claims incurred but not yet reported based upon our estimate of ultimate cost, which is calculated using analyses of historical data. We monitor new claims and claim development as well as trends related to the claims incurred but not reported in order to assess the adequacy of our insurance reserves. Total self-insurance reserves were $44.1 million and $37.4 million, including $21.5 million and $18.2 million classified as Other Accrued Expenses, as of December 31, 2012 and 2011, respectively. The remaining balances of self-insurance reserves are classified as Other Noncurrent Liabilities, which reflects management's estimates of when claims will be paid. The reserves presented on the Consolidated Balance Sheets are net of claims deposits of $0.5 million at both December 31, 2012 and 2011. In addition to these claims deposits, we had outstanding letters of credit of $37.1 million and $31.8 million at December 31, 2012 and 2011, respectively, to guarantee self-insurance claims payments. While we do not expect the amounts ultimately paid to differ significantly from our estimates, our insurance reserves and corresponding expenses could be affected if future claims experience differs significantly from historical trends and assumptions. Income Taxes Current income taxes are provided on income reported for financial reporting purposes, adjusted for transactions that do not enter into the computation of income taxes payable in the same year. Deferred income taxes have been provided to show the effect of temporary differences between the tax bases of assets and liabilities and their reported amounts in the financial statements. A valuation allowance is provided for deferred tax assets if it is more likely than not that these items will either expire before we are able to realize their benefit or that future deductibility is uncertain. We recognize the benefits of uncertain tax positions taken or expected to be taken in tax returns in the provision for income taxes only for those positions that are more likely than not to be realized. We follow a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately forecast actual outcomes. Our policy is to include interest and penalties associated with income tax obligations in income tax expense. U.S. federal income taxes are not provided on our interest in undistributed earnings of foreign subsidiaries when it is management's intent that such earnings will remain invested in those subsidiaries or other foreign subsidiaries. Taxes will be provided on these earnings in the period in which a decision is made to repatriate the earnings. Depreciation Expense Included in Cost of Goods Sold on the Consolidated Statements of Income is depreciation expense associated with our refurbishing, remanufacturing, and furnace operations and our distribution centers. Rental Expense We recognize rental expense on a straight-line basis over the respective lease terms, including reasonably-assured renewal periods, for all of our operating leases. Foreign Currency Translation For most of our foreign operations, the local currency is the functional currency. Assets and liabilities are translated into U.S. dollars at the period-ending exchange rate. Statements of Income amounts are translated to U.S. dollars using average exchange rates during the period. Translation gains and losses are reported as a component of Accumulated Other Comprehensive Income (Loss) in stockholders' equity. Recent Accounting Pronouncements Effective January 1, 2012, we adopted the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2011-05, “Presentation of Comprehensive Income” and ASU No. 2011-12, “Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05.” These ASUs eliminate the option to present the components of other comprehensive income in the statement of changes in stockholders’ equity. Instead, entities have the option to present the components of net income, the components of other comprehensive income and total comprehensive income in a single continuous statement or in two separate but consecutive statements. The amendments did not change the items reported in other comprehensive income or when an item of other comprehensive income is reclassified to net income. As a result, the adoption of this guidance did not affect our financial position, results of operations or cash flows. We have presented the components of net income, the components of other comprehensive income and total comprehensive income in two separate but consecutive statements. Additionally, in February 2013, the FASB issued ASU 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This update requires disclosure of amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2012. The update does not change the items reported in other comprehensive income or when an item of other comprehensive income is reclassified to net income. As this guidance only revises the presentation and disclosures related to the reclassification of items out of accumulated other comprehensive income, the adoption of this guidance will not affect our financial position, results of operations or cash flows. Effective January 1, 2012, we adopted FASB ASU No. 2011-04, “Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs.” This update clarifies existing fair value measurement requirements, amends existing guidance primarily related to fair value measurements for financial instruments, and requires enhanced disclosures on fair value measurements. The additional disclosures are specific to Level 3 fair value measurements, transfers between Level 1 and Level 2 of the fair value hierarchy, financial instruments not measured at fair value and use of an asset measured or disclosed at fair value differing from its highest and best use. We applied the provisions of this ASU to our fair value measurements during the current year, however, the adoption did not have a material effect on our financial statements. See Note 7, "Fair Value Measurements," for the required disclosures.

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