Inventory Disclosure [Abstract] Finished goods (LIFO basis) LIFO Inventory Amount Increase (decrease) in LIFO reserve Inventory, LIFO Reserve, Period Charge Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Health and Nutrition [Member] Health and Nutrition [Member] Health and Nutrition [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Goodwill [Line Items] Goodwill [Line Items] Goodwill Goodwill Summary of Inventories Schedule of Inventory, Current [Table Text Block] Earnings Per Share [Abstract] Summary of basic and diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period Two [Member] Debt Instrument, Redemption, Period Two [Member] Debt Instrument, Redemption, Period Three [Member] Debt Instrument, Redemption, Period Three [Member] Derivative [Line Items] Derivative [Line Items] Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative, Notional Amount Derivative, Notional Amount Cash Flow Hedge Derivative Instrument Assets at Fair Value Cash Flow Hedge Derivative Instrument Assets at Fair Value Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan [Member] Term Loan [Member] Term Loan [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt Long-term Debt Less: unamortized debt issuance costs Unamortized Debt Issuance Expense Total debt, net of debt issuance costs Total debt, net of debt issuance costs total debt, net of debt issuance costs Less: current portion of long-term debt Long-term Debt, Current Maturities Total long-term debt Long-term Debt, Excluding Current Maturities Schedule of intangible assets and goodwill Schedule of Intangible Assets and Goodwill [Table Text Block] Assets Held For Sale [Abstract] Assets Held For Sale [Abstract] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss) Attributable to Parent Reconciliation to cash flows: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of debt issuance costs Amortization of Debt Issuance Costs Loss (gain) on deferred compensation assets Gain (Loss) on Investments Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit) Stock compensation expense Share-based Compensation Loss (gain) on property disposals Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Changes in operating accounts providing (using) cash: Increase (Decrease) in Operating Capital [Abstract] Trade receivables Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Income taxes Increase (Decrease) in Income Taxes Payable Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property, plant, and equipment Payments to Acquire Property, Plant, and Equipment Other Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Cash dividends paid Payments of Ordinary Dividends, Common Stock New shares issued Proceeds from Stock Plans Shares surrendered for payroll taxes Payments Related to Tax Withholding for Share-based Compensation Shares repurchased Payments for Repurchase of Equity Net proceeds from revolver borrowings Proceeds from (Repayments of) Debt Payments on term loan borrowings Repayments of Secured Debt Payments for debt issuance costs Payments of Debt Issuance Costs Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities NET INCREASE 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 DISCLOSURES OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid, Net Cash paid for interest Interest Paid Noncash investing activities - capital expenditures in accounts payable Capital Expenditures Incurred but Not yet Paid Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Performance-Based Restricted Stock [Member] Performance Shares [Member] Restricted Stock Awards [Member] Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Range of restricted stock to be issued minimum (shares) Range of Restricted Stock to be Issued Minimum Range of restricted stock to be issued minimum. Range of restricted stock to be issued maximum (shares) Range of Restricted Stock to be Issued Maximum Range of restricted stock to be issued maximum. Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Compensation expense Allocated Share-based Compensation Expense Restricted stock awards outstanding (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Number Restricted stock awards, weighted average exercise price (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Exercise Price Statement of Financial Position [Abstract] Allowance for doubtful accounts, trade receivables Allowance for Doubtful Accounts Receivable, Current Shares authorized Common Stock, Shares Authorized Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Earnings per Share Earnings Per Share [Text Block] Share Repurchase Program [Abstract] Share Repurchase Program [Abstract] Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Stock Repurchased During Period, Value Stock Repurchased During Period, Value Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Restricted stock activity Restricted Stock Activity [Abstract] Restricted stock activity. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested at beginning of period (Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited or expired (Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested at end of period (Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning Balance, Weighted average grant date fair value (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted, Weighted average grant date fair value (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending Balance, Weighted average grant date fair value (usd per share) Summary of Inventories Inventory, Net [Abstract] Inventory (FIFO basis) Inventory, Finished Goods, Gross LIFO reserve Inventory, LIFO Reserve Net inventory Inventory, Net Debt Debt Disclosure [Text Block] Revenue [Abstract] Revenue [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Industrial [Member] Industrial [Member] Industrial. Water Treatment [Member] Water Treatment [Member] Water treatment. Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Bulk / Distributed products [Member] Bulk / Distributed products [Member] Bulk / Distributed products [Member] Specialty / Manufactured products [Member] Specialty / Manufactured products [Member] Specialty / Manufactured products [Member] Other [Member] Other [Member] Other [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue Revenues Statement of Comprehensive Income [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized (loss) gain on interest rate swap Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment [Domain] Industrial [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sales Gross profit Gross Profit Selling, general, and administrative expenses Selling, General and Administrative Expense Operating income Operating Income (Loss) Commitments and Contingencies Disclosure [Abstract] Litigation, Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Tax [Abstract] Income Tax [Abstract] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Unrecognized Tax Benefits Unrecognized Tax Benefits Business Combination, Indemnification Assets, Amount as of Acquisition Date Business Combination, Indemnification Assets, Amount as of Acquisition Date Income Statement [Abstract] Cost of sales Cost of Goods and Services Sold Gross profit Selling, general and administrative expenses Operating income Interest expense, net Interest Income (Expense), Net Other (expense) 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) benefit Income Tax Expense (Benefit) Net income Weighted average number of shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share Earnings Per Share, Basic [Abstract] Basic earnings per share Earnings Per Share, Basic Diluted earnings per share Earnings Per Share, Diluted [Abstract] Diluted earnings per share Earnings Per Share, Diluted Cash dividends declared per common share Common Stock, Dividends, Per Share, Declared Document and Entity Information [Abstract] Document and entity information. Document Information [Table] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Environmental Remediation Expense Environmental Remediation Expense Accrual for Environmental Loss Contingencies, Revision in Estimates Accrual for Environmental Loss Contingencies, Revision in Estimates Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Segment Information Segment Reporting Disclosure [Text Block] ASSETS Assets [Abstract] CURRENT ASSETS: Assets, Current [Abstract] Cash and cash equivalents Trade receivables — less allowance for doubtful accounts: $589 as of December 30, 2018 and $942 as of April 1, 2018 Accounts Receivable, Net, Current Inventories Income taxes receivable Income Taxes Receivable, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current PROPERTY, PLANT, AND EQUIPMENT: Property, Plant and Equipment [Abstract] PROPERTY, PLANT, AND EQUIPMENT: Property, Plant and Equipment, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property, plant, and equipment Property, Plant and Equipment, Net OTHER ASSETS: Other Assets [Abstract] Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other Other Assets, Noncurrent Total other assets Other Assets Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES: Liabilities, Current [Abstract] Accounts payable — trade Accounts Payable, Current Dividends payable Dividends Payable, Current Accrued payroll and employee benefits Employee-related Liabilities, Current Current portion of long-term debt Container deposits Other Deferred Compensation Arrangements, Liability, Current Other current liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current LONG-TERM DEBT, LESS CURRENT PORTION PENSION WITHDRAWAL LIABILITY Liability, Defined Benefit Pension Plan, Noncurrent DEFERRED INCOME TAXES Deferred Tax Liabilities, Net, Noncurrent OTHER LONG-TERM LIABILITIES Other Liabilities, Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES Commitments and Contingencies SHAREHOLDERS’ EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Common stock; authorized: 30,000,000 shares of $0.05 par value; 10,619,681 and 10,631,992 shares issued and outstanding as of December 30, 2018 and April 1, 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Fair Value Disclosures [Abstract] Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Number of reportable segments (segments) Number of Reportable Segments Intersegment sales Intersegment Sales Intersegment sales. Number of operating segments aggregated (segments) Number of Operating Segments Aggregated Number of operating segments aggregated. Number of customer representing 10 percent or more of revenue (customers) Entity Wide Revenue Major Customer Number of Customers Entity wide revenue major customer number of customers. Quarterly Financial Information, Segment Reporting, Segment Assets, Material Change Quarterly Financial Information, Segment Reporting, Segment Assets, Material Change Revenue Recognition, Deferred Revenue [Policy Text Block] Revenue Recognition, Deferred Revenue [Policy Text Block] Assets Held-for-sale Assets Held-for-sale, Not Part of Disposal Group, Current Fair Value, Measurement Inputs, Disclosure [Text Block] Fair Value, Measurement Inputs, Disclosure [Text Block] Disclosure of Long Lived Assets Held-for-sale [Table Text Block] Disclosure of Long Lived Assets Held-for-sale [Table Text Block] Summary of performance-based restricted stock units Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] 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] Customer Relationships [Member] Customer Relationships [Member] Trademarks [Member] Trademarks [Member] Other finite-life intangible assets [Member] Other Finite Life Intangible Assets [Member] Other finite-life intangible assets. Summary of Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-life intangible assets, Gross Carrying Amount Finite-Lived Intangible Assets, Gross Finite-life intangible assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Total finite-life intangible assets, Net Finite-Lived Intangible Assets, Net Indefinite-life intangible assets gross Indefinite Lived Intangible Assets Excluding Goodwill Gross Indefinite-life intangible assets gross. Indefinite-life intangible assets, Accumulated Amortization Indefinite Intangible Assets Accumulated Amortization Indefinite-life intangible assets amortization. Indefinite-life intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Total Intangible Assets, Gross Intangible Assets, Gross (Excluding Goodwill) Total intangible assets, net Summary of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Inventories Inventory Disclosure [Text Block] Share Repurchase Program Stockholders' Equity Note Disclosure [Text Block] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, 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] Interest rate swap Deferred compensation plan assets Deferred Compensation Plan Assets Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Shares or stock options excluded from the calculation of diluted EPS Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Line of Credit Facility [Table] Line of Credit Facility [Table] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Revolving Loan Facility Letter of Credit Revolving Loan Facility Letter of Credit Revolving Loan Facility Letter of Credit Revolving Loan Facility Swingline Subfacility Revolving Loan Facility Swingline Subfacility Revolving Loan Facility Swingline Subfacility Interest rate percent above Federal Funds Effective Rate Interest rate percent above Federal Funds Effective Rate Interest rate percent above Federal Funds Effective Rate LIBOR Margin Minimum LIBOR Margin Minimum LIBOR Margin Minimum LIBOR Margin Maximum LIBOR Margin Maximum LIBOR Margin Maximum Base Rate Margin Minimum Base Rate Margin Minimum Base Rate Margin Minimum Base Rate Margin Maximum Base Rate Margin Maximum Base Rate Margin Maximum Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Commitment Fee Percentage Payments of Debt Issuance Costs Unamortized Debt Issuance Expense Summary of basic and diluted EPS Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding—basic Dilutive impact of performance units and restricted stock Weighted Average Number Diluted Shares Outstanding Adjustment Weighted-average common shares outstanding—diluted