New Accounting Pronouncements (Policies)	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements	Recently Issued In February 2016, the FASB issued ASU 2016-02, "Leases." The ASU requires the recognition of a right-of use asset and lease liability on the balance sheet by lessees for those leases classified as operating leases under previous guidance. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of adopting this ASU which it expects will have a significant impact on its condensed consolidated financial statements. Since the Company has operating leases in over 100 locations, equipment leases and embedded leases, the Company expects to recognize a significant right-of use asset and lease liability on its condensed consolidated balance sheet upon adoption of this ASU. As of September 30, 2018, the Company estimates that it will record right-of-use assets between $170.0 million to $190.0 million and lease liabilities within the same range on the condensed consolidated balance sheet upon the adoption of this standard, which predominately relate to real estate leases. The Company has elected the modified retrospective method and will include any cumulative-effect adjustment as of the date of adoption. In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the FASB's guidance on the impairment of financial instruments. The ASU adds to U.S. GAAP an impairment model ("current expected credit loss model"). Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The ASU is effective for fiscal years beginning after December 15, 2019. The Company is currently evaluating the impact, if any, that the ASU will have on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other, Simplifying the Test for Goodwill Impairment," which simplifies the subsequent measurement of goodwill. The Company is no longer required to perform its Step 2 goodwill impairment test; instead, the Company should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The ASU is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, "Targeted Improvements to Accounting for Hedging Activities," which amends the hedge accounting recognition and presentation requirements. The ASU improves the transparency and understandability of information conveyed to financial statement users by better aligning companies' hedging relationships to their existing risk management strategies, simplifies the application of hedge accounting and increases transparency regarding the scope and results of the hedging program. The ASU is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement - Disclosure Framework - Changes to the Disclosure Requirements for the Fair Value Measurement," which modifies the disclosure requirements related to fair value measurement. The ASU is effective for fiscal years and interim periods beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company's disclosure.

Recently Issued

In February 2016, the FASB issued ASU 2016-02, "Leases." The ASU requires the recognition of a right-of use asset and lease liability on the balance sheet by lessees for those leases classified as operating leases under previous guidance. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of adopting this ASU which it expects will have a significant impact on its condensed consolidated financial statements. Since the Company has operating leases in over 100 locations, equipment leases and embedded leases, the Company expects to recognize a significant right-of use asset and lease liability on its condensed consolidated balance sheet upon adoption of this ASU. As of September 30, 2018, the Company estimates that it will record right-of-use assets between $170.0 million to $190.0 million and lease liabilities within the same range on the condensed consolidated balance sheet upon the adoption of this standard, which predominately relate to real estate leases. The Company has elected the modified retrospective method and will include any cumulative-effect adjustment as of the date of adoption.

In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the FASB's guidance on the impairment of financial instruments. The ASU adds to U.S. GAAP an impairment model ("current expected credit loss model"). Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The ASU is effective for fiscal years beginning after December 15, 2019. The Company is currently evaluating the impact, if any, that the ASU will have on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other, Simplifying the Test for Goodwill Impairment," which simplifies the subsequent measurement of goodwill. The Company is no longer required to perform its Step 2 goodwill impairment test; instead, the Company should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. The ASU is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, "Targeted Improvements to Accounting for Hedging Activities," which amends the hedge accounting recognition and presentation requirements. The ASU improves the transparency and understandability of information conveyed to financial statement users by better aligning companies' hedging relationships to their existing risk management strategies, simplifies the application of hedge accounting and increases transparency regarding the scope and results of the hedging program. The ASU is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company; the adoption of the ASU is not currently expected to have a material impact on its condensed consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement - Disclosure Framework - Changes to the Disclosure Requirements for the Fair Value Measurement," which modifies the disclosure requirements related to fair value measurement. The ASU is effective for fiscal years and interim periods beginning after December 15, 2019 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, of the ASU on the Company's disclosure.