Restructuring and Related Activities [Abstract] Restructuring Charges Restructuring and Related Activities Disclosure [Text Block] Product Warranties Disclosures [Abstract] Product Warranty Product Warranty Disclosure [Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Pro forma Pro Forma [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] RSI Home Products, Inc. RSI Home Products, Inc. [Member] RSI Home Products, Inc. [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term loan Loans Payable [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Revolving Facility Revolving Facility [Member] Revolving Facility [Member] Initial Term Loan Initial Term Loan [Member] Initial Term Loan [Member] Delayed Draw Term Loan Delayed Draw Term Loan [Member] Delayed Draw Term Loan [Member] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving loan facility Revolving Credit Facility [Member] Letter of credit Letter of Credit [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt term Debt Instrument, Term Proceeds from loan Proceeds from Lines of Credit Acquisition, indebtedness assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities Consideration transferred, acquisition Business Combination, Consideration Transferred Acquisition, cash consideration, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Acquisition, shares issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Acquisition, shares issued, amount Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Acquisition, share price Share Price Goodwill Goodwill Customer receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Customer receivables, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Operating income (loss) Operating Income (Loss) Cost of sales Cost of Goods and Services Sold Effective income tax rate, proportional federal rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Outstanding on the Revolving Facility Long-term Line of Credit Amortization of debt issuance costs Amortization of Debt Issuance Costs Acquisition, transaction costs, add-dack, net of tax Business Acquisition, Transaction Costs, Add-Back, Net of Tax Business Acquisition, Transaction Costs, Add-Back, Net of Tax Revenue from Contract with Customer [Abstract] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Accounts Receivable, Net [Abstract] Customer Receivables Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in pension benefits, net of deferred taxes of $(105) and $(156), for the three months ended July 31, 2018 and 2017, respectively Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings Per Share [Abstract] Net income Denominator for basic net earnings per common share - weighted-average shares Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Stock options and restricted stock units Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for diluted net earnings per common share - weighted-average shares and assumed conversions Weighted Average Number of Shares Outstanding, Diluted Net earnings per share Earnings Per Share, Basic and Diluted [Abstract] Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Customer receivables Accounts Receivable [Member] Sales revenue, gross Sales Revenue Gross [Member] Revenue from sale of goods and services rendered, in the normal course of business, before sales returns and allowances, and sales discounts, when it serves as a benchmark in a concentration of risk calculation. 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Recurring Basis [Table Text Block] Number of employees reduced in force Number of Employees Reduced in Force Number of Employees Reduced in Force Restructuring charges, net Restructuring Charges Restructuring reserve Restructuring Reserve Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring reserve balance as of May 1, 2018 Expense Restructuring reserve balance as of May 1, 2018 Payments for Restructuring Reserve balance as of July 31, 2018 Net Earnings Per Share Earnings Per Share [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings and improvements Building and Building Improvements [Member] Buildings and improvements - capital leases Building And Improvements Capital Leases [Member] Building And Improvements Capital Leases [Member] Machinery and equipment Machinery and Equipment [Member] Machinery and equipment - capital leases Machinery And Equipment Capital Leases [Member] Machinery And Equipment Capital Leases [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Less accumulated amortization and depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, Plant and Equipment, Net, Total Property, Plant and Equipment, Net Amortization and depreciation expense on property, plant and equipment Other Depreciation and Amortization Accumulated amortization on capital leases Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Expected company contributions to pension plan Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Pension contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Statement of Financial Position [Abstract] Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, no par value (in usd per share) Common Stock, No Par Value Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Net loss on disposal of property, plant and equipment Gain (Loss) on Disposition of Property Plant Equipment Unrealized gain on foreign exchange forward contracts Gain (Loss) on Sale of Properties Gain on insurance recoveries Insurance Recoveries Stock-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Pension contributions in excess of expense Pension Contributions In Excess Of Pension Expense Pension Contributions In Excess Of Pension Expense Contributions of employer stock to employee benefit plan Employee Benefit Plan, Stock Expense Employee Benefit Plan, Stock Expense Other non-cash items Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Customer receivables Increase (Decrease) in Accounts Receivable Income taxes receivables Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Employee Related Liabilities Accrued compensation and related expenses Increase (Decrease) in Income Taxes Payable Income taxes payable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Marketing and other accrued expenses Increase (Decrease) in Other Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Payments to acquire property, plant and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from insurance recoveries Proceeds From Insurance Recoveries Proceeds From Insurance Recoveries Acquisition of business, net of cash acquired Purchases of certificates of deposit Payments to Acquire Other Investments Maturities of certificates of deposit Proceeds from Maturities, Prepayments and Calls of Other Investments Investment in promotional displays Payments to Acquire Other Productive Assets Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Payments of long-term debt Repayments of Long-term Debt Proceeds from long-term debt Proceeds from Issuance of Long-term Debt Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Repurchase of common stock Payments for Repurchase of Common Stock Withholding of employee taxes related to stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Net cash used by financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Supplemental cash flow information: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Property, plant and equipment included in accounts payable at period end Contribution of Property Cash paid during the period for: Supplemental Cash Flow Information [Abstract] Interest Interest Paid, Including Capitalized Interest, Operating and Investing Activities Income taxes Income Taxes Paid Organization, Consolidation and Presentation of Financial Statements [Abstract] Impairment charges related to goodwill Goodwill, Impairment Loss Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Position [Axis] Position [Axis] Position [Domain] Position [Domain] Long Long [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign Exchange Forward Foreign Exchange Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid Expenses and Other Current Assets [Member] Prepaid Expenses and Other Current Assets [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Other intangible assets Other Intangible Assets [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Impairment charges related to other intangible assets Impairment of Intangible Assets (Excluding Goodwill) Derivative, notional amount Derivative, Notional Amount Derivative, forward exchange rate Derivative, Forward Exchange Rate Derivative asset, fair value, gross asset Derivative Asset, Fair Value, Gross Asset Debt Disclosure [Abstract] Loans Payable and Long-Term Debt Debt Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Money Market Funds [Member] Money Market Funds [Member] Mutual Funds [Member] Mutual Funds [Member] Mutual Funds [Member] Certificates of Deposit [Member] Certificates of Deposit [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total assets at fair value Assets, Fair Value Disclosure Income Tax Disclosure [Abstract] Income Tax [Table] Income Tax [Table] Income Tax [Table] Income Tax [Line Items] Income Tax [Line Items] [Line Items] for Income Tax [Table] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Tax Cuts and Jobs Act of 2017, net tax benefit Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Excess tax benefit related to stock-based compensation Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Deferred income taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Current Inventory, Net [Abstract] Components of Inventories Schedule of Inventory, Current [Table Text Block] Document And Entity Information [Abstract] Document And Entity Information Abstract Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Trading Symbol Trading Symbol Customer relationships Customer Relationships [Member] Trademarks Trademarks [Member] Goodwill Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Customer receivables Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Customer Receivables Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Customer Receivables Income taxes receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Taxes Receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Taxes Receivable Prepaid expenses and other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Leasehold interests Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Leasehold Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Leasehold Total identifiable assets and goodwill acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Notes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Notes Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Notes Payable Income taxes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Taxes Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Taxes Payable Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Total accounting consideration Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Gross customer receivables Accounts Receivable, Gross, Current Less: Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Allowance for returns and discounts Allowance For Returns And Discounts Allowance for returns and discounts Net customer receivables Accounts Receivable, Net, Current Income Statement [Abstract] Net sales Revenue from Contract with Customer, Excluding Assessed Tax Cost of sales and distribution Gross Profit Gross Profit Selling and marketing expenses Selling and Marketing Expense General and administrative expenses General and Administrative Expense Operating Income Interest expense (income), net Interest Income (Expense), Net Other income Other Nonoperating Income (Expense) Income Before Income Taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net Income Weighted Average Shares Outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Net earnings per share Acquisition of RSI Home Products, Inc. (the RSI Acquisition) Business Combination Disclosure [Text Block] Share-based Compensation [Abstract] Stock-Based Compensation Expense Allocated Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Home center retailers Home Center Retailers [Member] Home Center Retailers [Member] Builders Builders [Member] Builders [Member] Independent dealers and distributors Independent Dealers and Distributors [Member] Independent Dealers and Distributors [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Income Taxes Income Tax Disclosure [Text Block] Warranty claims period Product Warranty Claims, Period Product Warranty Claims, Period Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Beginning balance Standard and Extended Product Warranty Accrual Accrual Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Settlements Standard and Extended Product Warranty Accrual, Decrease for Payments Ending balance Goodwill and Intangible Assets Disclosure [Abstract] Components of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Net Sales Business Acquisition, Pro Forma Revenue Net Income Business Acquisition, Pro Forma Net Income (Loss) Net earnings per share - basic Business Acquisition, Pro Forma Earnings Per Share, Basic Net earnings per share - diluted Business Acquisition, Pro Forma Earnings Per Share, Diluted Shares of its common stock repurchased Treasury Stock, Shares, Acquired Shares excluded from the calculation of net earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Income Statement Location [Domain] Cost of Sales and Distribution [Member] Cost Of Sales And Distribution [Member] Cost Of Sales And Distribution [Member] Selling and Marketing Expenses [Member] Selling and Marketing Expense [Member] General and Administrative Expenses [Member] General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Stock-based compensation expense Allocated Share-based Compensation Expense Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Wells Fargo [Member] Wells Fargo [Member] Wells Fargo [Member] Loans Payable [Member] Initial Term Loan [Member] Delayed Draw Term Loan [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument, face amount Debt Instrument, Face Amount Prior revolving credit facility terminated Line Of Credit Facility, Agreement Terminated Line Of Credit Facility, Agreement Terminated Outstanding on the Initial Term Loan Long-term Debt, Gross Stock-Based Compensation Shareholders' Equity and Share-based Payments [Text Block] Revenue Recognition Revenue from Contract with Customer [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Cliff Vest [Member] Cliff Vest [Member] Cliff Vest [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Employee Service-Based RSUs [Member] Employee Service-Based Restricted Stock Units [Member] Employee Service-Based Restricted Stock Units [Member] Employee Performance-Based RSUs [Member] Employee Performance Based Restricted Stock Units [Member] Employee Performance Based Restricted Stock Units [Member] RSUs [Member] Restricted Stock Units (RSUs) [Member] Employee Performance-Based RSTUs [Member] Employee Performance Based Restricted Stock Tracking Units [Member] Employee Performance Based Restricted Stock Tracking Units [Member] Employee Service-Based RSTUs [Member] Employee Service Based Restricted Stock Tracking Units [Member] Employee Service Based Restricted Stock Tracking Units [Member] RSTUs [Member] Restricted Stock Tracking Units Rstu [Member] Restricted Stock Tracking Units RSTU [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Vesting period, years Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Awarded in period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Common stock issuable per RSU granted (in shares) Share-based Goods and Nonemployee Services Transaction, Shares Issuable Per Restricted Stock Unit Granted Share-based Goods and Nonemployee Services Transaction, Shares Issuable Per Restricted Stock Unit Granted Restricted stock units non vested grants (in shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantsInPeriod Liability for payment of the RSTUs Employee-related Liabilities, Current Weighted Average Amortization Period Finite-Lived Intangible Assets, Remaining Amortization Period Cost Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amount Finite-Lived Intangible Assets, Net Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] COMMON STOCK Common Stock [Member] RETAINED EARNINGS Retained Earnings [Member] ACCUMULATED OTHER COMPREHENSIVE LOSS AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance, Shares Beginning Balance Stockholders' Equity Attributable to Parent Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Net of Tax Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Exercise of stock-based compensation awards, net of amounts withheld for taxes, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock-based compensation awards, net of amounts withheld for taxes Stock Issued During Period, Value, Stock Options Exercised Stock repurchases, shares Stock Repurchased and Retired During Period, Shares Stock repurchases Stock Repurchased and Retired During Period, Value Employee benefit plan contributions, shares Stock Issued During Period, Shares, Employee Benefit Plan Employee benefit plan contributions Stock Issued During Period, Value, Employee Benefit Plan Ending Balance, Shares Ending Balance Inventories Inventory Disclosure [Text Block] ASSETS Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Investments - certificates of deposit Certificates of Deposit, at Carrying Value Customer receivables, net Inventories Inventory, Net Income taxes receivable Income Taxes Receivable, Current Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Investments - certificates of deposit Certificates of Deposit, Noncurrent Certificates of Deposit, Noncurrent Intangibles, net Intangible Assets, Net (Excluding Goodwill) Promotional displays, net Promotional Displays Net Promotional displays net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other assets Other Assets, Noncurrent TOTAL ASSETS Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Current maturities of long-term debt Long-term Debt, Current Maturities Accrued compensation and related expenses Accrued marketing expenses Accrued Marketing Costs, Current Other accrued expenses Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt, less current maturities Long-term Debt and Capital Lease Obligations Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Defined benefit pension liabilities Liability, Defined Benefit Pension Plan, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Shareholders' equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $1.00 par value; 2,000,000 shares authorized, none issued Preferred Stock, Value, Issued Common stock, no par value; 40,000,000 shares authorized; issued and outstanding shares at October 31, 2016: 17,503,330; at April 30, 2017: 16,232,775 Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss - Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Defined benefit pension plans Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Total shareholders' equity TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Components of Customer Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Senior Notes [Member] Senior Notes [Member] Secured Debt [Member] Secured Debt [Member] 4.875% Senior Notes Due 2026 [Member] 4.875% Senior Notes Due 2026 [Member] 4.875% Senior Notes Due 2026 [Member] RSI Notes [Member] RSI Notes [Member] RSI Notes [Member] Fair value of RSI Notes Long-term Debt, Fair Value Aggregate principal amount outstanding Long-term Debt Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Intangibles Intangible Assets Disclosure [Text Block] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Subordinated promissory notes payable to certain current and former RSI employees Term of promissory notes Aggregate outstanding balance Amortization expense Amortization of Intangible Assets Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Recognized net actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Net periodic pension benefit Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Supplemental Pro Forma Financial Information Schedule of Business Acquisitions, by Acquisition [Table Text Block] Raw materials Inventory, Raw Materials, Gross Work-in-process Inventory, Work in Process, Gross Finished goods Inventory, Finished Goods, Gross Total FIFO inventories Inventory, Gross Reserve to adjust inventories to LIFO value Inventory, LIFO Reserve Total inventories Inventory carried under FIFO FIFO Inventory Amount Inventory carried under LIFO LIFO Inventory Amount Commitments and Contingencies Disclosure [Abstract] Other Information Commitments and Contingencies Disclosure [Text Block] Restructuring Charges Reserve Restructuring and Related Costs [Table Text Block]