Recently Issued Accounting Pronouncements	3 Months Ended
Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (“FASB”) issued accounting guidance designed to enhance comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets. The core principle of the guidance is that revenue recognized from a transaction or event that arises from a contract with a customer should reflect the consideration to which an entity expects to be entitled in exchange for goods or services provided. To achieve that core principle the new guidance sets forth a five-step revenue recognition model that will need to be applied consistently to all contracts with customers, except those that are within the scope of other topics in the ASC. Also required are new disclosures to help users of financial statements better understand the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. The new disclosures include qualitative and quantitative information about contracts with customers, significant judgments made in applying the revenue guidance, and assets recognized related to the costs to obtain or fulfill a contract. In March 2016 and April 2016, the FASB issued amendments to this new guidance that provides clarification about principal versus agent considerations, identification of performance obligations and accounting for the licensing of intellectual property. In May 2016, the FASB issued an amendment to the guidance that provides clarification about collectibility, noncash consideration, presentation of sales tax, and transition. In December 2016, the FASB issued an amendment to the guidance that provides narrow-scope improvements and practical expedient regarding collectibility, presentation of sales tax collected from customers, non-cash considerations, contract modifications at transition, completed contracts at transition and other technical corrections. These new requirements become effective for annual and interim reporting periods beginning after December 15, 2017. Early adoption is permitted for annual and interim reporting periods beginning after December 15, 2016. We expect to adopt the new standard in the first quarter of 2018 using the modified retrospective method. We have made significant progress in evaluating our existing contracts and accounting policies to determine the impact this standard will have on the condensed consolidated financial statements and related disclosures. In July 2015, the FASB issued accounting guidance that requires inventory to be measured at the lower of cost and net realizable value. The scope of this guidance excludes inventory measured using the last-in first-out method or the retail inventory method. This new requirement became effective on January 1, 2017 and did not have a significant impact on our condensed consolidated financial statements. In February 2016, the FASB issued accounting guidance that requires assets and liabilities arising from leases to be recorded on the balance sheet. Additional disclosures are required regarding the amount, timing, and uncertainty of cash flows from leases. This new guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied using a modified retrospective approach. Early adoption is permitted. The impact of this new requirement on our financial statements is being assessed and is not yet known. In March 2016, the FASB issued accounting guidance that simplifies several aspects of the accounting for share-based payment awards. Among other things, this guidance requires all tax effects related to share-based payment awards to be recognized as income tax expense or benefit on the income statement, thus eliminating all additional paid-in capital pools. An entity should recognize excess tax benefits regardless of whether the benefit reduces income taxes payable in the current period. For interim reporting purposes, excess tax benefits and tax deficiencies should be accounted for as discrete items in the reporting period in which they occur. Additionally, this new guidance requires all tax related cash flows resulting from share-based payments to be presented as an operating activity on the statement of cash flows rather than as a financing activity. This guidance became effective on January 1, 2017. The impact of recognizing excess tax benefits in the income statement resulted in a $4.1 million reduction in Income tax expense for the three-month period ended March 31, 2017. The remaining aspects of adopting this guidance did not have a material impact on our condensed consolidated financial statements. In August 2016, the FASB issued accounting guidance which clarifies the proper presentation and classification of certain cash receipts and cash payments in the statement of cash flows. The new guidance addresses cash flow issues including, but not limited to, debt prepayment or debt extinguishment costs and distributions received from equity method investments. As allowed by the provisions of this new guidance, we early-adopted this new guidance in the first quarter of 2017. The adoption of this new guidance did not have a significant impact on our condensed consolidated financial statements. In November 2016, the FASB issued accounting guidance that requires restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling the beginning and end of period total amounts shown on the statement of cash flows. This guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a retrospective basis. Early adoption is permitted. We do not expect this guidance to have a significant impact on our financial statements. In January 2017, the FASB issued accounting guidance to clarify the definition of a business for determining whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a prospective basis. Early adoption is permitted. We currently do not expect this guidance to have a significant impact on our financial statements. In January 2017, the FASB issued accounting guidance to simplify the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a reporting unit to calculate the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit has been acquired in a business combination. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance will remain unchanged. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied on a prospective basis. Early adoption is permitted for goodwill impairment tests performed after January 1, 2017. We do not expect this guidance to have a significant impact on our financial statements. In March 2017, the FASB issued accounting guidance that changes the presentation of net periodic pension and postretirement benefit cost (“net benefit cost”) in the income statement. This new guidance requires service cost to be presented as part of operating income (expense) and all other components of net benefit cost are to be shown outside of operations. This guidance will be effective for periods beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a retrospective basis. Early adoption is permitted as of the beginning of an annual period for which an entity’s financial statements have not been issued or made available for issuance. We do not expect this guidance to have a significant impact on our financial statements.

Recently Issued Accounting Pronouncements:

In May 2014, the Financial Accounting Standards Board (“FASB”) issued accounting guidance designed to enhance comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets. The core principle of the guidance is that revenue recognized from a transaction or event that arises from a contract with a customer should reflect the consideration to which an entity expects to be entitled in exchange for goods or services provided. To achieve that core principle the new guidance sets forth a five-step revenue recognition model that will need to be applied consistently to all contracts with customers, except those that are within the scope of other topics in the ASC. Also required are new disclosures to help users of financial statements better understand the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. The new disclosures include qualitative and quantitative information about contracts with customers, significant judgments made in applying the revenue guidance, and assets recognized related to the costs to obtain or fulfill a contract. In March 2016 and April 2016, the FASB issued amendments to this new guidance that provides clarification about principal versus agent considerations, identification of performance obligations and accounting for the licensing of intellectual property. In May 2016, the FASB issued an amendment to the guidance that provides clarification about collectibility, noncash consideration, presentation of sales tax, and transition. In December 2016, the FASB issued an amendment to the guidance that provides narrow-scope improvements and practical expedient regarding collectibility, presentation of sales tax collected from customers, non-cash considerations, contract modifications at transition, completed contracts at transition and other technical corrections. These new requirements become effective for annual and interim reporting periods beginning after December 15, 2017. Early adoption is permitted for annual and interim reporting periods beginning after December 15, 2016. We expect to adopt the new standard in the first quarter of 2018 using the modified retrospective method. We have made significant progress in evaluating our existing contracts and accounting policies to determine the impact this standard will have on the condensed consolidated financial statements and related disclosures.

In July 2015, the FASB issued accounting guidance that requires inventory to be measured at the lower of cost and net realizable value. The scope of this guidance excludes inventory measured using the last-in first-out method or the retail inventory method. This new requirement became effective on January 1, 2017 and did not have a significant impact on our condensed consolidated financial statements.

In February 2016, the FASB issued accounting guidance that requires assets and liabilities arising from leases to be recorded on the balance sheet. Additional disclosures are required regarding the amount, timing, and uncertainty of cash flows from leases. This new guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied using a modified retrospective approach. Early adoption is permitted. The impact of this new requirement on our financial statements is being assessed and is not yet known.

In March 2016, the FASB issued accounting guidance that simplifies several aspects of the accounting for share-based payment awards. Among other things, this guidance requires all tax effects related to share-based payment awards to be recognized as income tax expense or benefit on the income statement, thus eliminating all additional paid-in capital pools. An entity should recognize excess tax benefits regardless of whether the benefit reduces income taxes payable in the current period. For interim reporting purposes, excess tax benefits and tax deficiencies should be accounted for as discrete items in the reporting period in which they occur. Additionally, this new guidance requires all tax related cash flows resulting from share-based payments to be presented as an operating activity on the statement of cash flows rather than as a financing activity. This guidance became effective on January 1, 2017. The impact of recognizing excess tax benefits in the income statement resulted in a $4.1 million reduction in Income tax expense for the three-month period ended March 31, 2017. The remaining aspects of adopting this guidance did not have a material impact on our condensed consolidated financial statements.

In August 2016, the FASB issued accounting guidance which clarifies the proper presentation and classification of certain cash receipts and cash payments in the statement of cash flows. The new guidance addresses cash flow issues including, but not limited to, debt prepayment or debt extinguishment costs and distributions received from equity method investments. As allowed by the provisions of this new guidance, we early-adopted this new guidance in the first quarter of 2017. The adoption of this new guidance did not have a significant impact on our condensed consolidated financial statements.

In November 2016, the FASB issued accounting guidance that requires restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling the beginning and end of period total amounts shown on the statement of cash flows. This guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a retrospective basis. Early adoption is permitted. We do not expect this guidance to have a significant impact on our financial statements.

In January 2017, the FASB issued accounting guidance to clarify the definition of a business for determining whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a prospective basis. Early adoption is permitted. We currently do not expect this guidance to have a significant impact on our financial statements.

In January 2017, the FASB issued accounting guidance to simplify the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a reporting unit to calculate the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit has been acquired in a business combination. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance will remain unchanged. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied on a prospective basis. Early adoption is permitted for goodwill impairment tests performed after January 1, 2017. We do not expect this guidance to have a significant impact on our financial statements.

In March 2017, the FASB issued accounting guidance that changes the presentation of net periodic pension and postretirement benefit cost (“net benefit cost”) in the income statement. This new guidance requires service cost to be presented as part of operating income (expense) and all other components of net benefit cost are to be shown outside of operations. This guidance will be effective for periods beginning after December 15, 2017, including interim periods within those fiscal years, and is to be applied on a retrospective basis. Early adoption is permitted as of the beginning of an annual period for which an entity’s financial statements have not been issued or made available for issuance. We do not expect this guidance to have a significant impact on our financial statements.