Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2020
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, current conditions, and reasonable forecasts. 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 (FIFO) method) or net realizable value. Cost includes material, labor, and overhead. 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. Leases The Company leases certain manufacturing and distribution facilities, administrative office space, semi-tractors, trailers, forklifts, and other equipment through operating leases with unrelated third parties. At contract inception, the Company determines whether a contract is or contains a lease and whether the lease should be classified as an operating or finance lease. The Company recognizes operating lease right-of-use assets and operating lease liabilities based on the present value of the future minimum lease payments over the lease term at the commencement date. The Company uses its incremental borrowing rate based on information available at lease inception in determining the present value of the lease payments. The Company applies a portfolio approach for determining the incremental borrowing rate based on applicable lease terms and the current economic environment. Many of the Company's leases include renewal options, which are included in the lease term when it is reasonably certain the option will be exercised. Leases with an initial term of 12 months or less are recognized in lease expense on a straight-line basis over the lease term and not recorded on the Consolidated Balance Sheet. Certain of the Company's lease arrangements contain lease components (such as minimum rent payments) and non-lease components (such as common-area or other maintenance costs and taxes). The Company generally accounts for each component separately based on the estimated standalone price of each component. Some of the Company's lease arrangements include rental payments that are adjusted periodically for an index rate. These leases are initially measured using the projected payments in effect at the inception of the lease. Certain of the Company's leased semi-tractors, trailers, and forklifts include variable costs for usage or mileage. Such variable costs are expensed as incurred and included in variable lease costs. Finance leases and lease arrangements under which the Company is the lessor are not material to the Company's consolidated financial statements. The Company's lease agreements typically do not contain any significant residual value guarantees or restrictive covenants. 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, warranty claim lag, 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 6 - 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. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all the deferred tax assets will not be realized. 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 2020 and 2019, 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. Intangible assets with indefinite lives are not amortized, but instead are tested for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist. 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. 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 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. 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 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 The Company recognizes revenue when performance obligations under the terms of contracts with customers are satisfied, which occurs with the transfer of control of the Company’s products. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products to its customers. Sales, value added and other taxes collected concurrent with revenue-producing activities are excluded from revenue. For the majority of product sales, the Company transfers control and recognizes revenue when it ships the product from its facility to its customer. The amount of consideration the Company receives and the revenue recognized varies with sales discounts, volume rebate programs and indexed material pricing. When the Company offers customers retrospective volume rebates, it estimates the expected rebates based on an analysis of historical experience. The Company adjusts its estimate of revenue related to volume rebates at the earlier of when the most likely amount of consideration expected to be received changes or when the consideration becomes fixed. When the Company offers customers prompt pay sales discounts or agrees to variable pricing based on material indices, it estimates the expected discounts or pricing adjustments based on an analysis of historical experience. The Company adjusts its estimate of revenue related to sales discounts and indexed material pricing to the expected value of the consideration to which the Company will be entitled. The Company includes the variable consideration in the transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur when the volume, discount or indexed material price uncertainties are resolved. See Note 14 - Segment Reporting for the Company’s disclosures of disaggregated revenue. 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 $104.4 million, $77.3 million, and $83.2 million in the years ended December 31, 2020, 2019, and 2018, 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 December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes, eliminates certain exceptions within Accounting Standards Codifications ("ASC") 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. The new standard is effective for fiscal years beginning after December 15, 2021. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company is evaluating the effect of adopting this new accounting guidance.

Accounts receivable are stated at historical carrying value, net of write-offs and allowances. The Company establishes allowances based upon historical experience, current conditions, and reasonable forecasts. Uncollectible accounts receivable are written off when a settlement is reached or when the Company has determined the balance will not be collected.

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 leases certain manufacturing and distribution facilities, administrative office space, semi-tractors, trailers, forklifts, and other equipment through operating leases with unrelated third parties. At contract inception, the Company determines whether a contract is or contains a lease and whether the lease should be classified as an operating or finance lease. The Company recognizes operating lease right-of-use assets and operating lease liabilities based on the present value of the future minimum lease payments over the lease term at the commencement date. The Company uses its incremental borrowing rate based on information available at lease inception in determining the present value of the lease payments. The Company applies a portfolio approach for determining the incremental borrowing rate based on applicable lease terms and the current economic environment. Many of the Company's leases include renewal options, which are included in the lease term when it is reasonably certain the option will be exercised. Leases with an initial term of 12 months or less are recognized in lease expense on a straight-line basis over the lease term and not recorded on the Consolidated Balance Sheet.

Certain of the Company's lease arrangements contain lease components (such as minimum rent payments) and non-lease components (such as common-area or other maintenance costs and taxes). The Company generally accounts for each component separately based on the estimated standalone price of each component. Some of the Company's lease arrangements

include rental payments that are adjusted periodically for an index rate. These leases are initially measured using the projected payments in effect at the inception of the lease. Certain of the Company's leased semi-tractors, trailers, and forklifts include variable costs for usage or mileage. Such variable costs are expensed as incurred and included in variable lease costs.

Finance leases and lease arrangements under which the Company is the lessor are not material to the Company's consolidated financial statements. The Company's lease agreements typically do not contain any significant residual value guarantees or restrictive covenants.

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, warranty claim lag, 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 6 - Accrued Expenses and Other Current Liabilities for further detail.

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. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all the deferred tax assets will not be realized.

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 2020 and 2019, 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. Intangible assets with indefinite lives are not amortized, but instead are tested for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist.

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.

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 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 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 revenue when performance obligations under the terms of contracts with customers are satisfied, which occurs with the transfer of control of the Company’s products. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products to its customers. Sales, value added and other taxes collected concurrent with revenue-producing activities are excluded from revenue.

For the majority of product sales, the Company transfers control and recognizes revenue when it ships the product from its facility to its customer. The amount of consideration the Company receives and the revenue recognized varies with sales discounts, volume rebate programs and indexed material pricing. When the Company offers customers retrospective volume rebates, it estimates the expected rebates based on an analysis of historical experience. The Company adjusts its estimate of revenue related to volume rebates at the earlier of when the most likely amount of consideration expected to be received changes or when the consideration becomes fixed. When the Company offers customers prompt pay sales discounts or agrees to variable pricing based on material indices, it estimates the expected discounts or pricing adjustments based on an analysis of historical experience. The Company adjusts its estimate of revenue related to sales discounts and indexed material pricing to the expected value of the consideration to which the Company will be entitled. The Company includes the variable consideration in the transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur when the volume, discount or indexed material price uncertainties are resolved.

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 $104.4 million, $77.3 million, and $83.2 million in the years ended December 31, 2020, 2019, and 2018, 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.