Description of Business and Summary of Significant Accounting Policies (Policies)	9 Months Ended
Feb. 01, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. Actual results could differ from these estimates.
Recently Adopted Accounting Pronouncements and New Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, “Leases,” which amended authoritative guidance on leases and is codified in Accounting Standards Codification ("ASC") 842. The amended guidance requires entities to record most leased assets and liabilities on the balance sheet, and also retains a dual model approach for assessing lease classification and recognizing expense. The FASB subsequently issued updates to provide clarification on specific topics, including adoption guidance, practical expedients and interim transition disclosure requirements. The Company adopted the standard on April 28, 2019, by applying the modified retrospective method without restatement of comparative periods' financial information, as permitted by the transition guidance. Accordingly, the Company has provided disclosures required by prior lease guidance for comparative periods. The adoption of this standard resulted in the recognition of right-of-use assets of $27.6 million and related lease obligations of $28.1 million as of April 28, 2019. The standard did not have a significant impact on the Company's operating results or cash flows. The Company elected certain practical expedients, including the election not to reassess its prior conclusions about lease identification, lease classification and initial direct costs, as well as the election not to separate lease and non-lease components for arrangements where the Company is a lessee. Lastly, the Company elected to recognize a right-of-use asset and related lease liability for leases with a lease term of 12 months or less for all classes of underlying assets. The Company determines if an arrangement contains a lease at inception. Operating lease expense is recognized on a straight-line basis over the lease term. For purposes of calculating operating lease obligations under the standard, the Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such option. The Company's leases do not contain material residual value guarantees or material restrictive covenants. The discount rate used to measure a lease obligation should be the rate implicit in the lease; however, the Company’s operating leases generally do not provide an implicit rate. Accordingly, the Company uses its incremental borrowing rate at lease commencement to determine the present value of lease payments. The incremental borrowing rate is an entity-specific rate which represents the rate of interest a lessee would pay to borrow on a collateralized basis over a similar term with similar payments. Refer to Note 3, "Leases," for additional information. In February 2018, the FASB issued ASU No. 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from U.S. Tax Reform’s reduction of the U.S. federal corporate income tax rate. The Company adopted ASU 2018-02 as of April 28, 2019 and the adoption had no impact on the Company’s consolidated financial statements. New Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments.” The guidance in ASU 2016-13 requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. It replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. This guidance is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. Management is currently assessing the impact of the new standard, but does not anticipate that the adoption of this standard will have a material impact on the way it estimates the allowance for doubtful accounts on its trade accounts receivable. In August 2018, the FASB issued ASU 2018-15, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The guidance in ASU 2018-15 clarifies the accounting for implementation costs in cloud computing arrangements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019, with early adoption permitted. The Company is evaluating the impact of adopting this new accounting guidance on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement." The guidance in ASU 2018-13 changes disclosure requirements related to fair value measurements as part of the disclosure framework project. The disclosure framework project aims to improve the effectiveness of disclosures in the notes to the financial statements by focusing on requirements that clearly communicate the most important information to users of the financial statements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019, with early adoption permitted. The Company is evaluating the provisions of the updated guidance and assessing the impact on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, "Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740)," which simplifies the accounting for income taxes. The new guidance removes certain exceptions to the general principles in ASC 740, such as recognizing deferred taxes for equity investments, the incremental approach to performing intra-period tax allocation and calculating income taxes in interim periods. The standard also simplifies accounting for income taxes under GAAP by clarifying and amending existing guidance, including the recognition of deferred taxes for goodwill, the allocation of taxes to members of a consolidated group and requiring that an entity reflect the effect of enacted changes in tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. This guidance is effective for annual periods beginning after December 15, 2020, and interim periods thereafter; however, early adoption is permitted. The Company is evaluating the provisions of the updated guidance and assessing the impact on its consolidated financial statements.
Revenue	The majority of the Company's revenue is recognized at a point in time. The Company has determined that the most definitive demonstration that control has transferred to a customer is physical shipment or delivery, depending on the contractual shipping terms, except for consignment transactions. Consignment transactions are arrangements where the Company transfers product to a customer location but retains ownership and control of such product until it is used by the customer. Revenue for consignment arrangements is recognized upon the customer’s usage. Revenues associated with products which the Company believes have no alternative use, and where the Company has an enforceable right to payment, are recognized on an over time basis. The Company believes the most faithful depiction of the transfer of goods to the customer is based on progress to date, which is typically smooth throughout the production process. As such, the Company recognizes revenue evenly over the production process through transfer of control to the customer. Customers typically negotiate annual price downs. Management has evaluated these price downs and determined that in some instances, these price downs give rise to a material right. In instances that a material right exists, a portion of the transaction price is allocated to the material right and recognized over the life of the contract. The Company treats shipping and handling costs as an activity necessary to fulfill the performance obligation to transfer product to the customer and not as a separate performance obligation. Shipping and handling costs are estimated at quarter-end in proportion to revenue recognized for transactions where actual costs are not yet known. Across all products, the amount of revenue recognized corresponds to the related purchase order. Revenue is adjusted for variable consideration (such as discounts) as described further below. Sales and other taxes collected concurrent with revenue-producing activities are excluded from revenue.
Leases	The Company elected certain practical expedients, including the election not to reassess its prior conclusions about lease identification, lease classification and initial direct costs, as well as the election not to separate lease and non-lease components for arrangements where the Company is a lessee. Lastly, the Company elected to recognize a right-of-use asset and related lease liability for leases with a lease term of 12 months or less for all classes of underlying assets. The Company determines if an arrangement contains a lease at inception. Operating lease expense is recognized on a straight-line basis over the lease term. For purposes of calculating operating lease obligations under the standard, the Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such option. The Company's leases do not contain material residual value guarantees or material restrictive covenants. The discount rate used to measure a lease obligation should be the rate implicit in the lease; however, the Company’s operating leases generally do not provide an implicit rate. Accordingly, the Company uses its incremental borrowing rate at lease commencement to determine the present value of lease payments. The incremental borrowing rate is an entity-specific rate which represents the rate of interest a lessee would pay to borrow on a collateralized basis over a similar term with similar payments. Refer to Note 3, "Leases," for additional information.
Inventory	Inventories are stated at the lower-of-cost or net realizable value. Cost is determined using the first-in, first-out method. Finished products and work-in-process inventories include direct material costs and direct and indirect manufacturing costs. The Company records reserves for inventory that may be obsolete or in excess of current and future market demand.
Property, Plant and Equipment	Property, plant and equipment is stated at cost. Maintenance and repair costs are expensed as incurred. Depreciation is calculated using the straight-line method using estimated useful lives of 5 to 40 years for buildings and building improvements and 3 to 15 years for machinery and equipment.
Income per Share	Basic income per share is calculated by dividing net income by the weighted average number of common shares outstanding for the applicable period. Diluted income per share is calculated after adjusting the denominator of the basic income per share calculation for the effect of all potentially dilutive common shares outstanding during the period.
Contingencies	Certain litigation arising in the normal course of business is pending against us. The Company is, from time-to-time, subject to various legal actions and claims incidental to our business, including those arising out of alleged defects, breach of contracts, employment-related matters, environmental matters and intellectual property matters. The Company considers insurance coverage and third-party indemnification when determining required accruals for pending litigation and claims. Although the outcome of potential legal actions and claims cannot be determined, it is the Company's opinion, based on the information available, that it has adequate reserves for these liabilities.

Description of Business and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Feb. 01, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. Actual results could differ from these estimates.

Recently Adopted Accounting Pronouncements and New Accounting Pronouncements Not Yet Adopted

Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, “Leases,” which amended authoritative guidance on leases and is codified in Accounting Standards Codification ("ASC") 842. The amended guidance requires entities to record most leased assets and liabilities on the balance sheet, and also retains a dual model approach for assessing lease classification and recognizing expense. The FASB subsequently issued updates to provide clarification on specific topics, including adoption guidance, practical expedients and interim transition disclosure requirements.

The Company adopted the standard on April 28, 2019, by applying the modified retrospective method without restatement of comparative periods' financial information, as permitted by the transition guidance. Accordingly, the Company has provided disclosures required by prior lease guidance for comparative periods. The adoption of this standard resulted in the recognition of right-of-use assets of $27.6 million and related lease obligations of $28.1 million as of April 28, 2019. The standard did not have a significant impact on the Company's operating results or cash flows.

The Company elected certain practical expedients, including the election not to reassess its prior conclusions about lease identification, lease classification and initial direct costs, as well as the election not to separate lease and non-lease components for arrangements where the Company is a lessee. Lastly, the Company elected to recognize a right-of-use asset and related lease liability for leases with a lease term of 12 months or less for all classes of underlying assets. The Company determines if an arrangement contains a lease at inception. Operating lease expense is recognized on a straight-line basis over the lease term.

For purposes of calculating operating lease obligations under the standard, the Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such option. The Company's leases do not contain material residual value guarantees or material restrictive covenants. The discount rate used to measure a lease obligation should be the rate implicit in the lease; however, the Company’s operating leases generally do not provide an implicit rate. Accordingly, the Company uses its incremental borrowing rate at lease commencement to determine the present value of lease payments. The incremental borrowing rate is an entity-specific rate which represents the rate of interest a lessee would pay to borrow on a collateralized basis over a similar term with similar payments. Refer to Note 3, "Leases," for additional information.

In February 2018, the FASB issued ASU No. 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from U.S. Tax Reform’s reduction of the U.S. federal corporate income tax rate. The Company adopted ASU 2018-02 as of April 28, 2019 and the adoption had no impact on the Company’s consolidated financial statements.

New Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments.” The guidance in ASU 2016-13 requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. It replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. This guidance is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. Management is currently assessing the impact of the new standard, but does not anticipate that the adoption of this standard will have a material impact on the way it estimates the allowance for doubtful accounts on its trade accounts receivable.

In August 2018, the FASB issued ASU 2018-15, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The guidance in ASU 2018-15 clarifies the accounting for implementation costs in cloud computing arrangements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019, with early adoption permitted. The Company is evaluating the impact of adopting this new accounting guidance on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) – Disclosure

Framework – Changes to the Disclosure Requirements for Fair Value Measurement." The guidance in ASU 2018-13 changes disclosure requirements related to fair value measurements as part of the disclosure framework project. The disclosure framework project aims to improve the effectiveness of disclosures in the notes to the financial statements by focusing on requirements that clearly communicate the most important information to users of the financial statements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019, with early adoption permitted. The Company is evaluating the provisions of the updated guidance and assessing the impact on its consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, "Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740)," which simplifies the accounting for income taxes. The new guidance removes certain exceptions to the general principles in ASC 740, such as recognizing deferred taxes for equity investments, the incremental approach to performing intra-period tax allocation and calculating income taxes in interim periods. The standard also simplifies accounting for income taxes under GAAP by clarifying and amending existing guidance, including the recognition of deferred taxes for goodwill, the allocation of taxes to members of a consolidated group and requiring that an entity reflect the effect of enacted changes in tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. This guidance is effective for annual periods beginning after December 15, 2020, and interim periods thereafter; however, early adoption is permitted. The Company is evaluating the provisions of the updated guidance and assessing the impact on its consolidated financial statements.

Revenue

The majority of the Company's revenue is recognized at a point in time. The Company has determined that the most definitive demonstration that control has transferred to a customer is physical shipment or delivery, depending on the contractual shipping terms, except for consignment transactions. Consignment transactions are arrangements where the Company transfers product to a customer location but retains ownership and control of such product until it is used by the customer. Revenue for consignment arrangements is recognized upon the customer’s usage.

Revenues associated with products which the Company believes have no alternative use, and where the Company has an enforceable right to payment, are recognized on an over time basis. The Company believes the most faithful depiction of the transfer of goods to the customer is based on progress to date, which is typically smooth throughout the production process. As such, the Company recognizes revenue evenly over the production process through transfer of control to the customer.

Customers typically negotiate annual price downs. Management has evaluated these price downs and determined that in some instances, these price downs give rise to a material right. In instances that a material right exists, a portion of the transaction price is allocated to the material right and recognized over the life of the contract.

The Company treats shipping and handling costs as an activity necessary to fulfill the performance obligation to transfer product to the customer and not as a separate performance obligation. Shipping and handling costs are estimated at quarter-end in proportion to revenue recognized for transactions where actual costs are not yet known.

Across all products, the amount of revenue recognized corresponds to the related purchase order. Revenue is adjusted for variable consideration (such as discounts) as described further below. Sales and other taxes collected concurrent with revenue-producing activities are excluded from revenue.

Leases

Inventory

Inventories are stated at the lower-of-cost or net realizable value. Cost is determined using the first-in, first-out method. Finished products and work-in-process inventories include direct material costs and direct and indirect manufacturing costs. The Company records reserves for inventory that may be obsolete or in excess of current and future market demand.

Property, Plant and Equipment

Property, plant and equipment is stated at cost. Maintenance and repair costs are expensed as incurred. Depreciation is calculated using the straight-line method using estimated useful lives of 5 to 40 years for buildings and building improvements and 3 to 15 years for machinery and equipment.

Income per Share

Basic income per share is calculated by dividing net income by the weighted average number of common shares outstanding for the applicable period. Diluted income per share is calculated after adjusting the denominator of the basic income per share calculation for the effect of all potentially dilutive common shares outstanding during the period.

Contingencies

Certain litigation arising in the normal course of business is pending against us. The Company is, from time-to-time, subject to various legal actions and claims incidental to our business, including those arising out of alleged defects, breach of contracts, employment-related matters, environmental matters and intellectual property matters. The Company considers insurance coverage and third-party indemnification when determining required accruals for pending litigation and claims. Although the outcome of potential legal actions and claims cannot be determined, it is the Company's opinion, based on the information available, that it has adequate reserves for these liabilities.