Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Cash and Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less at the time of purchase to be cash equivalents. Accounts Receivable Accounts receivable are stated at historical carrying value, net of write-offs and allowances. The Company establishes allowances based upon historical experience and any specific customer collection issues identified by the Company. Uncollectible accounts receivable are written off when a settlement is reached or when the Company has determined the balance will not be collected. Inventories Inventories are stated at the lower of cost (using the first-in, first-out method) or market. Cost includes material, labor and overhead; market is replacement cost or realizable value after allowance for costs of distribution. Fixed Assets Fixed assets which are owned are stated at cost less accumulated depreciation, and are depreciated on a straight-line basis over the estimated useful lives of the properties and equipment. Leasehold improvements and leased equipment are amortized over the shorter of the lives of the leases or the underlying assets. Maintenance and repair costs that do not improve service potential or extend economic life are expensed as incurred. Warranty The Company provides warranty terms based upon the type of product sold. The Company estimates the warranty accrual based upon various factors, including historical warranty costs, current trends, product mix, and sales. The accounting for warranty accruals requires the Company to make assumptions and judgments, and to the extent actual results differ from original estimates, adjustments to recorded accruals may be required. See Note 7 - Accrued Expenses and Other Current Liabilities for further detail. Income Taxes Deferred tax assets and liabilities are determined based on the temporary differences between the financial reporting and tax basis of assets and liabilities, applying enacted statutory tax rates in effect for the year in which the differences are expected to reverse. The Company accounts for uncertainty in tax positions by recognizing in its financial statements the impact of a tax position only if that position is more likely than not of being sustained on audit, based on the technical merits of the position. Further, the Company assesses the tax benefits of the tax positions in its financial statements based on experience with similar tax positions, information obtained during the examination process and the advice of experts. The Company recognizes previously unrecognized tax benefits upon the earlier of the expiration of the period to assess tax in the applicable taxing jurisdiction or when the matter is constructively settled and upon changes in statutes or regulations and new case law or rulings. The Company classifies interest and penalties related to income taxes as a component of income tax expense in its Consolidated Statements of Income. Goodwill Goodwill represents the excess of the total consideration given in an acquisition of a business over the fair value of the net tangible and identifiable intangible assets acquired. Goodwill is not amortized, but instead is tested at the reporting unit level for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist. In 2018 and 2017, the Company assessed qualitative factors of its reporting units to determine whether it was more likely than not the fair value of the reporting unit was less than its carrying amount, including goodwill. The qualitative impairment test consists of an assessment of qualitative factors, including general economic and industry conditions, market share and input costs. Other Intangible Assets Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment. Intangible assets are amortized using either an accelerated or straight-line method, whichever best reflects the pattern in which the estimated future economic benefits of the asset will be consumed. The useful lives of intangible assets are determined after considering the expected cash flows and other specific facts and circumstances related to each intangible asset. Impairment of Long-Lived Assets Long-lived assets, other than goodwill, are tested for impairment when changes in circumstances indicate their carrying value may not be recoverable. A determination of impairment, if any, is made based on the undiscounted value of estimated future cash flows, salvage value or expected net sales proceeds, depending on the circumstances. Impairment is measured as the excess of the carrying value over the estimated fair value of such assets. Asset Retirement Obligations Asset retirement obligations are legal obligations associated with the retirement of long-lived assets. The Company records asset retirement obligations on certain of its owned and leased facilities and leased machinery and equipment. These liabilities are initially recorded at fair value and are adjusted for changes resulting from revisions to the timing or the amount of the original estimate. Environmental Liabilities Accruals for environmental matters are recorded when it is probable a liability has been incurred and the amount of the liability can be reasonably estimated, based upon current law and existing technologies. These amounts, which are not discounted and are exclusive of claims against potentially responsible third parties, are adjusted periodically as assessment and remediation efforts progress or additional technical or legal information becomes available. Environmental exposures are difficult to assess for numerous reasons, including the identification of new sites, developments at sites resulting from investigatory studies and remedial activities, advances in technology, changes in environmental laws and regulations and their application, the scarcity of reliable data pertaining to identified sites, the difficulty in assessing the involvement and financial capability of other potentially responsible parties and the Company’s ability to obtain contributions from other parties, and the lengthy time periods over which site remediation occurs. It is possible some of these matters (the outcomes of which are subject to various uncertainties) may be resolved unfavorably against the Company, and could materially affect operating results when resolved in future periods. Foreign Currency Translation The financial statements of the Company’s international subsidiaries generally are measured using the local currency as the functional currency. The translation from the applicable foreign currency to U.S. Dollars is performed for balance sheet accounts using exchange rates in effect at the balance sheet date and for revenue and expense accounts using the weighted average exchange rate for the period. The resulting translation adjustments are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity. The Company reflects net foreign exchange transaction gains and losses resulting from the conversion of the transaction currency to functional currency as a component of foreign currency exchange gains or losses in selling, general and administrative expenses in the Consolidated Statements of Income. Financial Instruments The carrying values of cash and cash equivalents, accounts receivable, derivative instruments, and accounts payable approximate their fair value due to the short-term nature of these instruments. Stock-Based Compensation All stock-based compensation awards are expensed over their vesting period, based on fair value. For awards having a service-only vesting condition, the Company recognizes stock-based compensation expense on a straight-line basis over the requisite service periods. For awards with a performance vesting condition, which are subject to certain pre-established performance targets, the Company recognizes stock-based compensation expense on a graded-vesting basis to the extent it is probable the performance targets will be met. The fair value for stock options is determined using the Black-Scholes option-pricing model, while the fair values of deferred stock units, restricted stock units, restricted stock and stock awards are based on the market price of the Company’s common stock, all on the date the stock-based awards are granted. Revenue Recognition See Note 3 - Revenue for information regarding the Company’s revenue recognition policies. Shipping and Handling Costs The Company recognizes shipping and handling costs as fulfillment costs when control over products has transferred to the customer, and records the expense within selling, general and administrative expenses. Such costs aggregated $83.2 million, $68.6 million and $51.8 million in the years ended December 31, 2018, 2017 and 2016, respectively. Legal Costs The Company expenses all legal costs associated with litigation as incurred. Legal expenses are included in selling, general and administrative expenses in the Consolidated Statements of Income. Fair Value Measurements Fair value is determined using a hierarchy that has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant unobservable inputs. Recent Accounting Pronouncements Recently issued accounting pronouncements not yet adopted In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-04, Simplifying the Test for Goodwill Impairment, which amends Accounting Standards Codification (“ASC”) 350, Intangibles - Goodwill and Other. This ASU simplifies how an entity is required to test goodwill for impairment by eliminating step 2 from the goodwill impairment test. Step 2 measures goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2020 and does not expect the adoption to have a material impact on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2020 and is currently assessing the impact of this ASU on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires, in most instances, a lessee to recognize on its balance sheet a liability to make lease payments (the lease liability) and also a right-of-use asset representing its right to use the underlying asset for the lease term. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The Company will adopt ASU 2016-02 in the first quarter of 2019 using the cumulative-effect adjustment transition method approved by the FASB in July 2018. The Company will elect the package of practical expedients permitted under the transition guidance, which allows the carryforward of historical lease classification, the assessment of whether a contract is or contains a lease, and initial direct costs for any leases that exist prior to adoption of the new standard. The Company also will elect to keep leases with an initial term of 12 months or less off its Consolidated Balance Sheet and recognize the associated lease payments in its Consolidated Statements of Income on a straight-line basis over the lease term. The Company is finalizing its implementation related to policies, processes and internal controls to comply with ASU 2016-02. While the Company is continuing to assess the potential impacts of this standard, the Company estimates that the adoption of ASU 2016-02 will result in the recognition of right-of-use assets and lease liabilities for operating leases of approximately $60 million to $75 million on its Consolidated Balance Sheets, with no material impact to its Consolidated Statements of Income or Cash Flows. The standard also requires expanded disclosure regarding the amounts, timing and uncertainties of cash flows related to an entity’s lease portfolio. The Company is evaluating these disclosure requirements and is incorporating the collection of relevant data into our processes in preparation for disclosure in 2019. Recently adopted accounting pronouncements In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities, which amends ASC 815, Derivatives and Hedging. This ASU better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company adopted the provisions of ASU 2017-12 in the fourth quarter of 2018. The adoption did not result in a material impact to our financial results. See Note 13 - Fair Value Measurements for further detail. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (“Topic 606”). Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method. The adoption did not result in a cumulative effect adjustment to beginning retained earnings. Comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. See Note 3 - Revenue for further detail. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, which amends ASC 230, Statement of Cash Flows. This ASU provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. This ASU is effective for annual and interim periods beginning after December 15, 2017, and should be applied retrospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted this ASU effective January 1, 2018, with retrospective disclosure. As a result, the Company reclassified $2.4 million and $1.7 million of cash outflows from financing activities to cash outflows from operations for the years ended December 31, 2017 and 2016, respectively. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amended ASC 718, Compensation - Stock Compensation. This ASU simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, the classification of awards as either equity or liabilities, and the classification on the statement of cash flows. Under the new standard, all excess tax benefits and tax deficiencies are recorded as a component of the provision for income taxes in the reporting period in which they occur. Additionally, ASU 2016-09 requires that the Company present excess tax benefits on its Consolidated Statement of Cash Flows as an operating activity. The Company adopted ASU 2016-09 in the first quarter of 2017 and elected to apply this adoption prospectively. Prior periods were not adjusted. The adoption of the ASU resulted in the recognition of excess tax benefits in the provision for income taxes within the Consolidated Financial Statements of $8.4 million for the year ended December 31, 2017. Additionally, the Consolidated Statements of Cash Flows now present excess tax benefits as an operating activity, adjusted prospectively. Finally, the Company elected to continue to estimate forfeitures based on historical data and recognizes forfeiture compensation expense over the vesting period of the award.

Fixed assets which are owned are stated at cost less accumulated depreciation, and are depreciated on a straight-line basis over the estimated useful lives of the properties and equipment. Leasehold improvements and leased equipment are amortized over the shorter of the lives of the leases or the underlying assets. Maintenance and repair costs that do not improve service potential or extend economic life are expensed as incurred.

The Company provides warranty terms based upon the type of product sold. The Company estimates the warranty accrual based upon various factors, including historical warranty costs, current trends, product mix, and sales. The accounting for warranty accruals requires the Company to make assumptions and judgments, and to the extent actual results differ from original estimates, adjustments to recorded accruals may be required. See Note 7 - Accrued Expenses and Other Current Liabilities for further detail.

The Company accounts for uncertainty in tax positions by recognizing in its financial statements the impact of a tax position only if that position is more likely than not of being sustained on audit, based on the technical merits of the position. Further, the Company assesses the tax benefits of the tax positions in its financial statements based on experience with similar tax positions, information obtained during the examination process and the advice of experts. The Company recognizes previously unrecognized tax benefits upon the earlier of the expiration of the period to assess tax in the applicable taxing jurisdiction or when the matter is constructively settled and upon changes in statutes or regulations and new case law or rulings. The Company classifies interest and penalties related to income taxes as a component of income tax expense in its Consolidated Statements of Income.

Goodwill represents the excess of the total consideration given in an acquisition of a business over the fair value of the net tangible and identifiable intangible assets acquired. Goodwill is not amortized, but instead is tested at the reporting unit level for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist. In 2018 and 2017, the Company assessed qualitative factors of its reporting units to determine whether it was more likely than not the fair value of the reporting unit was less than its carrying amount, including goodwill. The qualitative impairment test consists of an assessment of qualitative factors, including general economic and industry conditions, market share and input costs.

Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment. Intangible assets are amortized using either an accelerated or straight-line method, whichever best reflects the pattern in which the estimated future economic benefits of the asset will be consumed. The useful lives of intangible assets are determined after considering the expected cash flows and other specific facts and circumstances related to each intangible asset.

Long-lived assets, other than goodwill, are tested for impairment when changes in circumstances indicate their carrying value may not be recoverable. A determination of impairment, if any, is made based on the undiscounted value of estimated future cash flows, salvage value or expected net sales proceeds, depending on the circumstances. Impairment is measured as the excess of the carrying value over the estimated fair value of such assets.

Asset retirement obligations are legal obligations associated with the retirement of long-lived assets. The Company records asset retirement obligations on certain of its owned and leased facilities and leased machinery and equipment. These liabilities are initially recorded at fair value and are adjusted for changes resulting from revisions to the timing or the amount of the original estimate.

Accruals for environmental matters are recorded when it is probable a liability has been incurred and the amount of the liability can be reasonably estimated, based upon current law and existing technologies. These amounts, which are not discounted and are exclusive of claims against potentially responsible third parties, are adjusted periodically as assessment and remediation efforts progress or additional technical or legal information becomes available. Environmental exposures are difficult to assess for numerous reasons, including the identification of new sites, developments at sites resulting from investigatory studies and remedial activities, advances in technology, changes in environmental laws and regulations and their application, the scarcity of reliable data pertaining to identified sites, the difficulty in assessing the involvement and financial capability of other potentially responsible parties and the Company’s ability to obtain contributions from other parties, and the lengthy time periods over which site remediation occurs. It is possible some of these matters (the outcomes of which are subject to various uncertainties) may be resolved unfavorably against the Company, and could materially affect operating results when resolved in future periods.

The financial statements of the Company’s international subsidiaries generally are measured using the local currency as the functional currency. The translation from the applicable foreign currency to U.S. Dollars is performed for balance sheet accounts using exchange rates in effect at the balance sheet date and for revenue and expense accounts using the weighted average exchange rate for the period. The resulting translation adjustments are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity. The Company reflects net foreign exchange transaction gains and losses resulting from the conversion of the transaction currency to functional currency as a component of foreign currency exchange gains or losses in selling, general and administrative expenses in the Consolidated Statements of Income.

All stock-based compensation awards are expensed over their vesting period, based on fair value. For awards having a service-only vesting condition, the Company recognizes stock-based compensation expense on a straight-line basis over the requisite service periods. For awards with a performance vesting condition, which are subject to certain pre-established performance targets, the Company recognizes stock-based compensation expense on a graded-vesting basis to the extent it is probable the performance targets will be met. The fair value for stock options is determined using the Black-Scholes option-pricing model, while the fair values of deferred stock units, restricted stock units, restricted stock and stock awards are based on the market price of the Company’s common stock, all on the date the stock-based awards are granted.

The Company recognizes shipping and handling costs as fulfillment costs when control over products has transferred to the customer, and records the expense within selling, general and administrative expenses. Such costs aggregated $83.2 million, $68.6 million and $51.8 million in the years ended December 31, 2018, 2017 and 2016, respectively.

Fair value is determined using a hierarchy that has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant unobservable inputs.

In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-04, Simplifying the Test for Goodwill Impairment, which amends Accounting Standards Codification (“ASC”) 350, Intangibles - Goodwill and Other. This ASU simplifies how an entity is required to test goodwill for impairment by eliminating step 2 from the goodwill impairment test. Step 2 measures goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2020 and does not expect the adoption to have a material impact on its consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company will adopt this guidance in the first quarter of 2020 and is currently assessing the impact of this ASU on its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires, in most instances, a lessee to recognize on its balance sheet a liability to make lease payments (the lease liability) and also a right-of-use asset representing its right to use the underlying asset for the lease term. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The Company will adopt ASU 2016-02 in the first quarter of 2019 using the cumulative-effect adjustment transition method approved by the FASB in July 2018. The Company will elect the package of practical expedients permitted under the transition guidance, which allows the carryforward of historical lease classification, the assessment of whether a contract is or contains a lease, and initial direct costs for any leases that exist prior to adoption of the new standard. The Company also will elect to keep leases with an initial term of 12 months or less off its Consolidated Balance Sheet and recognize the associated lease payments in its Consolidated Statements of Income on a straight-line basis over the lease term.

The Company is finalizing its implementation related to policies, processes and internal controls to comply with ASU 2016-02. While the Company is continuing to assess the potential impacts of this standard, the Company estimates that the adoption of ASU 2016-02 will result in the recognition of right-of-use assets and lease liabilities for operating leases of approximately $60 million to $75 million on its Consolidated Balance Sheets, with no material impact to its Consolidated Statements of Income or Cash Flows. The standard also requires expanded disclosure regarding the amounts, timing and uncertainties of cash flows related to an entity’s lease portfolio. The Company is evaluating these disclosure requirements and is incorporating the collection of relevant data into our processes in preparation for disclosure in 2019.

In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities, which amends ASC 815, Derivatives and Hedging. This ASU better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company adopted the provisions of ASU 2017-12 in the fourth quarter of 2018. The adoption did not result in a material impact to our financial results. See Note 13 - Fair Value Measurements for further detail.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (“Topic 606”). Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method. The adoption did not result in a cumulative effect adjustment to beginning retained earnings. Comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. See Note 3 - Revenue for further detail.

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, which amends ASC 230, Statement of Cash Flows. This ASU provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. This ASU is effective for annual and interim periods beginning after December 15, 2017, and should be applied retrospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted this ASU effective January 1, 2018, with retrospective disclosure. As a result, the Company reclassified $2.4 million and $1.7 million of cash outflows from financing activities to cash outflows from operations for the years ended December 31, 2017 and 2016, respectively.

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amended ASC 718, Compensation - Stock Compensation. This ASU simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, the classification of awards as either equity or liabilities, and the classification on the statement of cash flows. Under the new standard, all excess tax benefits and tax deficiencies are recorded as a component of the provision for income taxes in the reporting period in which they occur. Additionally, ASU 2016-09 requires that the Company present excess tax benefits on its Consolidated Statement of Cash Flows as an operating activity. The Company adopted ASU 2016-09 in the first quarter of 2017 and elected to apply this adoption prospectively. Prior periods were not adjusted. The adoption of the ASU resulted in the recognition of excess tax benefits in the provision for income taxes within the Consolidated Financial Statements of $8.4 million for the year ended December 31, 2017. Additionally, the Consolidated Statements of Cash Flows now present excess tax benefits as an operating activity, adjusted prospectively. Finally, the Company elected to continue to estimate forfeitures based on historical data and recognizes forfeiture compensation expense over the vesting period of the award.