Recent Accounting Pronouncements (Policies)	9 Months Ended
Sep. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent accounting pronouncements, policy	In May of 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standard Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). Under ASU 2014-09, an entity is required to follow a five-step process to determine the amount of revenue to recognize when promised goods or services are transferred to customers. ASU 2014-09 offers specific accounting guidance for costs to obtain or fulfill a contract with a customer. In addition, an entity is required to disclose sufficient information to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In August of 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date” (“ASU 2015-14”), to defer the effective date of ASU 2014-09 by one year. For public companies, ASU 2015-14 changes ASU 2014-09 to be effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. These ASUs can be adopted retrospectively or as a cumulative-effective adjustment at the date of adoption, with early adoption allowed, but not before December 15, 2016. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The Company has established a task force, composed of multiple functional groups inside of the Company, which is currently in the process of evaluating critical components of this new guidance and the potential impact of the guidance on the Company’s financial position, results of operations and cash flows. Based on the preliminary work completed, the Company is considering the potential implications of the new standard on the Company’s recognition of customer related accounts receivable, warranty costs that are not the responsibility of the Company’s suppliers, the application of the Company’s retail O’Rewards loyalty program and all applicable financial statement disclosures required by the new guidance. At this time, the task force has not completed its evaluation of the impact or means of adoption. In February of 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). Under ASU 2016-02, an entity will be required to recognize right-of-use assets and lease liabilities on its balance sheet and disclose key information about leasing arrangements. ASU 2016-02 offers specific accounting guidance for a lessee, a lessor and sale and leaseback transactions. Lessees and lessors are required to disclose qualitative and quantitative information about leasing arrangements to enable a user of the financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. For public companies, ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period, and requires a modified retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2019. The Company has established a task force, composed of multiple functional groups inside of the Company, which is currently in the process of evaluating critical components of this new guidance and the potential impact of the guidance on the Company’s financial position, results of operations and cash flows. Based on the preliminary work completed, the Company is considering the potential implications of the new standard on determining the discount rate to be used in valuing new and existing leases, the treatment of existing favorable and unfavorable lease agreements acquired in connection with previous acquisitions, procedural and operational changes that may be necessary to comply with the provisions of the guidance and all applicable financial statement disclosures required by the new guidance, all of which are areas that could potentially be impacted by adoption of the guidance. At this time, the task force has not completed its full evaluation; however, the Company believes the adoption of the new guidance will have a material impact on the total assets and total liabilities reported on the Company’s consolidated balance sheets. In March of 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). Under ASU 2016-09, several aspects of the accounting for share-based payment transactions, including tax consequence, classification of awards as equity or liabilities, and classification on the statement of cash flows, were changed. The Company adopted this guidance with its first quarter ending March 31, 2017. Upon adoption of ASU 2016-09, the Company elected to change its accounting policy to account for forfeitures as they occur; this change was applied using the modified retrospective transition method with a cumulative effect adjustment of $0.3 million to opening “Retained earnings” on the accompanying Condensed Consolidated Balance Sheet as of September 30, 2017. The Company applied the amendments related to the presentation of tax withholdings on the statements of cash flows using the retrospective transition method, which resulted in $0.2 million of tax withholdings being reclassified from “Net cash provided by operating activities” to “Net cash used in financing activities” on the accompanying Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2016. The Company elected to apply the amendments related to the presentation of excess tax benefits on the statements of cash flows using the retrospective transition method, which resulted in $46.0 million of excess tax benefits related to share-based compensation being reclassified from “Net cash used in financing activities” to “Net cash provided by operating activities” in the accompanying Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2016. ASU 2016-09 amendments related to accounting for excess tax benefits in the income statement have been adopted prospectively, resulting in the reduction of $2.8 million and $35.3 million in “Provision for income taxes” in the accompanying Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2017, respectively, which lowered the Company’s effective tax rate, increased dilutive shares outstanding and increased diluted earnings per share for the three and nine months ended September 30, 2017, by $0.02 and $0.35, respectively. In June of 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). Under ASU 2016-13, businesses and other organizations are required to present financial assets, measured at amortized costs basis, at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis, such as trade receivables. The measurement of expected credit loss will be based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. For public companies, ASU 2016-13 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period, and requires a modified retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2020. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows. In August of 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force)” (“ASU 2016-15”). ASU 2016-15 reduces the existing diversity in practice for eight specific parts on cash flow statement presentation and classification: debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance (COLI) policies; distributions received from equity method investments; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. For public companies, ASU 2016-15 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows. In January of 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business” (“ASU 2017-01”). ASU 2017-01 revises the definition of a business in the Accounting Standards Codification and clarifies the guidance for determining whether the purchase or disposal of an asset or group of assets qualifies as the purchase or disposal of a business. For public companies, ASU 2017-01 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires prospective adoption, with early adoption permitted with certain conditions. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows. In January of 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”). ASU 2017-04 eliminates the second step in the previous process for goodwill impairment testing; instead, the test is now a one-step process that calls for goodwill impairment loss to be measured as the excess of the reporting unit’s carrying amount over its fair value. For public companies, ASU 2017-04 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period, and requires prospective adoption, with early adoption after January 1, 2017. The Company will adopt this guidance beginning with its first quarter ending March 31, 2019. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows. In May of 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting” (“ASU 2017-09”). ASU 2017-09 provides clarity and reduces both the diversity in practice and cost and complexity when applying stock compensation guidance to a change to the terms or conditions of a share-based payment award. For public companies, ASU 2017-09 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires prospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.

In May of 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standard Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). Under ASU 2014-09, an entity is required to follow a five-step process to determine the amount of revenue to recognize when promised goods or services are transferred to customers. ASU 2014-09 offers specific accounting guidance for costs to obtain or fulfill a contract with a customer. In addition, an entity is required to disclose sufficient information to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In August of 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date” (“ASU 2015-14”), to defer the effective date of ASU 2014-09 by one year. For public companies, ASU 2015-14 changes ASU 2014-09 to be effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. These ASUs can be adopted retrospectively or as a cumulative-effective adjustment at the date of adoption, with early adoption allowed, but not before December 15, 2016. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The Company has established a task force, composed of multiple functional groups inside of the Company, which is currently in the process of evaluating critical components of this new guidance and the potential impact of the guidance on the Company’s financial position, results of operations and cash flows. Based on the preliminary work completed, the Company is considering the potential implications of the new standard on the Company’s recognition of customer related accounts receivable, warranty costs that are not the responsibility of the Company’s suppliers, the application of the Company’s retail O’Rewards loyalty program and all applicable financial statement disclosures required by the new guidance. At this time, the task force has not completed its evaluation of the impact or means of adoption.

In February of 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). Under ASU 2016-02, an entity will be required to recognize right-of-use assets and lease liabilities on its balance sheet and disclose key information about leasing arrangements. ASU 2016-02 offers specific accounting guidance for a lessee, a lessor and sale and leaseback transactions. Lessees and lessors are required to disclose qualitative and quantitative information about leasing arrangements to enable a user of the financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. For public companies, ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period, and requires a modified retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2019. The Company has established a task force, composed of multiple functional groups inside of the Company, which is currently in the process of evaluating critical components of this new guidance and the potential impact of the guidance on the Company’s financial position, results of operations and cash flows. Based on the preliminary work completed, the Company is considering the potential implications of the new standard on determining the discount rate to be used in valuing new and existing leases, the treatment of existing favorable and unfavorable lease agreements acquired in connection with previous acquisitions, procedural and operational changes that may be necessary to comply with the provisions of the guidance and all applicable financial statement disclosures required by the new guidance, all of which are areas that could potentially be impacted by adoption of the guidance. At this time, the task force has not completed its full evaluation; however, the Company believes the adoption of the new guidance will have a material impact on the total assets and total liabilities reported on the Company’s consolidated balance sheets.

In March of 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). Under ASU 2016-09, several aspects of the accounting for share-based payment transactions, including tax consequence, classification of awards as equity or liabilities, and classification on the statement of cash flows, were changed. The Company adopted this guidance with its first quarter ending March 31, 2017. Upon adoption of ASU 2016-09, the Company elected to change its accounting policy to account for forfeitures as they occur; this change was applied using the modified retrospective transition method with a cumulative effect adjustment of $0.3 million to opening “Retained earnings” on the accompanying Condensed Consolidated Balance Sheet as of September 30, 2017. The Company applied the amendments related to the presentation of tax withholdings on the statements of cash flows using the retrospective transition method, which resulted in $0.2 million of tax withholdings being reclassified from “Net cash provided by operating activities” to “Net cash used in financing activities” on the accompanying Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2016. The Company elected to apply the amendments related to the presentation of excess tax benefits on the statements of cash flows using the retrospective transition method, which resulted in $46.0 million of excess tax benefits related to share-based compensation being reclassified from “Net cash used in financing activities” to “Net cash provided by operating activities” in the accompanying Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2016. ASU 2016-09 amendments related to accounting for excess tax benefits in the income statement have been adopted prospectively, resulting in the reduction of $2.8 million and $35.3 million in “Provision for income taxes” in the accompanying Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2017, respectively, which lowered the Company’s effective tax rate, increased dilutive shares outstanding and increased diluted earnings per share for the three and nine months ended September 30, 2017, by $0.02 and $0.35, respectively.

In June of 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). Under ASU 2016-13, businesses and other organizations are required to present financial assets, measured at amortized costs basis, at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis, such as trade receivables. The measurement of expected credit loss will be based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. For public companies, ASU 2016-13 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period, and requires a modified retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2020. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.

In August of 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force)” (“ASU 2016-15”). ASU 2016-15 reduces the existing diversity in practice for eight specific parts on cash flow statement presentation and classification: debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance (COLI) policies; distributions received from equity method investments; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. For public companies, ASU 2016-15 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires retrospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.

In January of 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business” (“ASU 2017-01”). ASU 2017-01 revises the definition of a business in the Accounting Standards Codification and clarifies the guidance for determining whether the purchase or disposal of an asset or group of assets qualifies as the purchase or disposal of a business. For public companies, ASU 2017-01 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires prospective adoption, with early adoption permitted with certain conditions. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.

In January of 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”). ASU 2017-04 eliminates the second step in the previous process for goodwill impairment testing; instead, the test is now a one-step process that calls for goodwill impairment loss to be measured as the excess of the reporting unit’s carrying amount over its fair value. For public companies, ASU 2017-04 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period, and requires prospective adoption, with early adoption after January 1, 2017. The Company will adopt this guidance beginning with its first quarter ending March 31, 2019. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.

In May of 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting” (“ASU 2017-09”). ASU 2017-09 provides clarity and reduces both the diversity in practice and cost and complexity when applying stock compensation guidance to a change to the terms or conditions of a share-based payment award. For public companies, ASU 2017-09 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, and requires prospective adoption, with early adoption permitted. The Company will adopt this guidance beginning with its first quarter ending March 31, 2018. The application of this new guidance is not expected to have a material impact on the Company’s consolidated financial condition, results of operations or cash flows.