Recently Adopted and New Accounting Standards	12 Months Ended
Dec. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Adopted and Prospective Accounting Standards	Recently Adopted and New Accounting Standards Recently Adopted In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2017-04, Simplifying the Test for Goodwill Impairment (Topic 350). This ASU eliminates step two of the impairment test, the performance of a hypothetical purchase price allocation to measure goodwill impairment. Instead, impairment will be measured using the difference between the carrying amount and the fair value of the reporting unit. We adopted this standard on January 1, 2017 and applied this standard during our annual impairment test as of November 1, 2017. The adoption of this standard did not have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This ASU clarifies the definition of a business and provides a screen to determine when an integrated set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the asset is not a business. We adopted this standard on January 1, 2017. This standard did not have a material impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 718),(ASU 2016-09), which simplifies several aspects of accounting for share-based payment transactions, including income tax consequences, award classification, cash flows reporting, and forfeiture rate application. Specifically, the update requires all excess tax benefits and tax deficiencies to be recognized as income tax expense or benefit in the income statement. The update also allows excess tax benefits to be classified along with other income tax cash flows as an operating activity on the statement of cash flows. In addition, when accruing compensation cost, an entity can make an entity-wide accounting policy election to either estimate the number of awards expected to vest or to account for forfeitures as they occur. Lastly, the update requires cash paid by an employer when directly withholding shares for tax-withholding purposes to be classified as a financing activity on the statement of cash flows, consistent with our historical practice. We adopted ASU 2016-09 in the first quarter of 2017. We have not changed our method of estimating forfeitures as a result of our adoption of this standard. As a result of adopting this standard, excess tax benefits are classified along with other income tax cash flows as an operating activity on the statement of cash flows on a prospective basis and $2.2 million was charged to our income tax provision for the year ended December, 2017, resulting in a $0.13 earnings per share impact. New Accounting Standards In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (Act). This ASU also requires certain disclosures about stranded tax effects. The ASU will be effective prospectively for annual periods beginning after December 15, 2018, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. The adoption of this standard will result in a reclassification between retained earnings and accumulated other comprehensive loss (AOCL), increasing AOCL within the equity section of our Consolidated Balance Sheet. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. We are continuing our assessment of this new accounting standard. In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting to clarify when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The ASU will be effective prospectively for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The amendments in this ASU require that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. This ASU will be effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. The amendments in this update require retrospective presentation in the income statement. Changes to the capitalized portion of both service cost and the other components of net benefit cost within inventory will be applied prospectively. The adoption of this ASU will not have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We expect the adoption of this ASU will increase both our assets and liabilities presented on our Consolidated Balance Sheets to reflect the ROU assets and corresponding lease liabilities, as well as increase our leasing disclosures. As of December 31, 2017, the total future minimum lease payments for our operating leases totaled $75.3 million. We plan to adopt this standard on January 1, 2019. We are continuing our assessment and review of existing leases, which may identify other impacts, and are addressing necessary policy and process changes in preparation for adoption. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of the new standard is for companies to recognize revenue in a manner that depicts the transfer of goods or services to customers in amounts that reflect the consideration, or payment, to which the company expects to be entitled in exchange for those goods or services. The standard will also result in enhanced disclosures about revenue, provide guidance for transactions that were not previously addressed comprehensively, such as service revenue and contract modifications, and clarify guidance for multiple-element arrangements. This standard was originally issued as effective for fiscal years and interim periods within those years beginning after December 15, 2016, with early adoption prohibited. However, in July 2015, the FASB approved deferring the effective date by one year to December 15, 2017 for annual reporting periods beginning after that date. The new guidance requires enhanced disclosures, including revenue recognition policies to identify performance obligations to customers and significant judgments in measurement and recognition.The guidance permits a retrospective application of the new standard with certain practical expedients (contracts completed within the same annual reporting period need not be restated and other allowances for contracts with variable consideration) or retrospective application with a cumulative effect adjustment to the beginning balance of retained earnings. We will adopt the new revenue guidance effective January 1, 2018 using the cumulative effect method, and will not have an adjustment to retained earnings upon adoption. However, the adoption of Topic 606 will result in additional disclosures and updated internal controls and procedures around revenue recognition. We reviewed all other new accounting pronouncements issued in the period and concluded that they are not applicable to our business.

Recently Adopted and New Accounting Standards

Recently Adopted

In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2017-04, Simplifying the Test for Goodwill Impairment (Topic 350). This ASU eliminates step two of the impairment test, the performance of a hypothetical purchase price allocation to measure goodwill impairment. Instead, impairment will be measured using the difference between the carrying amount and the fair value of the reporting unit. We adopted this standard on January 1, 2017 and applied this standard during our annual impairment test as of November 1, 2017. The adoption of this standard did not have a material impact on our consolidated financial statements.

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This ASU clarifies the definition of a business and provides a screen to determine when an integrated set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the asset is not a business. We adopted this standard on January 1, 2017. This standard did not have a material impact on our consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 718),(ASU 2016-09), which simplifies several aspects of accounting for share-based payment transactions, including income tax consequences, award classification, cash flows reporting, and forfeiture rate application. Specifically, the update requires all excess tax benefits and tax deficiencies to be recognized as income tax expense or benefit in the income statement. The update also allows excess tax benefits to be classified along with other income tax cash flows as an operating activity on the statement of cash flows. In addition, when accruing compensation cost, an entity can make an entity-wide accounting policy election to either estimate the number of awards expected to vest or to account for forfeitures as they occur. Lastly, the update requires cash paid by an employer when directly withholding shares for tax-withholding purposes to be classified as a financing activity on the statement of cash flows, consistent with our historical practice. We adopted ASU 2016-09 in the first quarter of 2017. We have not changed our method of estimating forfeitures as a result of our adoption of this standard. As a result of adopting this standard, excess tax benefits are classified along with other income tax cash flows as an operating activity on the statement of cash flows on a prospective basis and $2.2 million was charged to our income tax provision for the year ended December, 2017, resulting in a $0.13 earnings per share impact.

New Accounting Standards

In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (Act). This ASU also requires certain disclosures about stranded tax effects. The ASU will be effective prospectively for annual periods beginning after December 15, 2018, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. The adoption of this standard will result in a reclassification between retained earnings and accumulated other comprehensive loss (AOCL), increasing AOCL within the equity section of our Consolidated Balance Sheet. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements. We are continuing our assessment of this new accounting standard.

In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting to clarify when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The ASU will be effective prospectively for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The amendments in this ASU require that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. This ASU will be effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We plan to adopt this standard on January 1, 2018. The amendments in this update require retrospective presentation in the income statement. Changes to the capitalized portion of both service cost and the other components of net benefit cost within inventory will be applied prospectively. The adoption of this ASU will not have a material impact on our consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We expect the adoption of this ASU will increase both our assets and liabilities presented on our Consolidated Balance Sheets to reflect the ROU assets and corresponding lease liabilities, as well as increase our leasing disclosures. As of December 31, 2017, the total future minimum lease payments for our operating leases totaled $75.3 million. We plan to adopt this standard on January 1, 2019. We are continuing our assessment and review of existing leases, which may identify other impacts, and are addressing necessary policy and process changes in preparation for adoption.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of the new standard is for companies to recognize revenue in a manner that depicts the transfer of goods or services to customers in amounts that reflect the consideration, or payment, to which the company expects to be entitled in exchange for those goods or services. The standard will also result in enhanced disclosures about revenue, provide guidance for transactions that were not previously addressed comprehensively, such as service revenue and contract modifications, and clarify guidance for multiple-element arrangements. This standard was originally issued as effective for fiscal years and interim periods within those years beginning after December 15, 2016, with early adoption prohibited. However, in July 2015, the FASB approved deferring the effective date by one year to December 15, 2017 for annual reporting periods beginning after that date. The new guidance requires enhanced disclosures, including revenue recognition policies to identify performance obligations to customers and significant judgments in measurement and recognition.The guidance permits a retrospective application of the new standard with certain practical expedients (contracts completed within the same annual reporting period need not be restated and other allowances for contracts with variable consideration) or retrospective application with a cumulative effect adjustment to the beginning balance of retained earnings. We will adopt the new revenue guidance effective January 1, 2018 using the cumulative effect method, and will not have an adjustment to retained earnings upon adoption. However, the adoption of Topic 606 will result in additional disclosures and updated internal controls and procedures around revenue recognition.

We reviewed all other new accounting pronouncements issued in the period and concluded that they are not applicable to our business.