Payables and Accruals [Abstract] Trade accounts payable Accounts Payable, Trade, Current Compensation Accrued Salaries, Current Profit sharing and retirement expense Accrued Profit Sharing and Retirement Expense, Current Profit Sharing and Retirement Expense, Current Marketing expenses Accrued Marketing Costs, Current Freight Accrued Freight Cost, Current Accrued Freight Cost, Current Other accrued expenses Other Accrued Liabilities, Current Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Accounting Policies [Abstract] Schedule of Investments [Table] Schedule of Investments [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Certificates of deposit Certificates of Deposit [Member] Debt securities Debt Securities [Member] Cash and money market accounts Cash and Cash Equivalents [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Short-term Investments Long-term investments Long-term Investments Amortized cost basis of the debt securities Available-for-sale Securities, Amortized Cost Basis Allowance for doubtful accounts receivable, current Allowance for Doubtful Accounts Receivable, Current Percentage of LIFO inventory Percentage of LIFO Inventory Effect of LIFO inventory, decrease (increase) in cost of goods sold Effect of LIFO Inventory Liquidation on Income LIFO Reserve Inventory, LIFO Reserve 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 improvements Land Improvements [Member] Buildings Building [Member] Machinery and equipment Machinery and Equipment [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Useful life, minimum Property, Plant and Equipment, Useful Life Reserve for estimated warranty settlements, current Standard Product Warranty Accrual, Current Reserve for estimated warranty settlements, noncurrent Standard Product Warranty Accrual, Noncurrent Product development costs Research and Development Expense Freight expense Freight Costs Accumulated foreign earnings considered permanently reinvested Undistributed Earnings of Foreign Subsidiaries Income tax effect of repatriation of foreign earnings Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Antidilutive securities excluding from computation of earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Insurance liabilities Self Insurance Reserve Equity [Abstract] Common Stock Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Par value (in dollars per share) Common Stock, Par or Stated Value Per Share Authorized (shares) Common Stock, Shares Authorized Issued (shares) Common Stock, Shares, Issued Outstanding (shares) Common Stock, Shares, Outstanding Preferred Stock Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Authorized (shares) Preferred Stock, Shares Authorized Issued (shares) Preferred Stock, Shares Issued Outstanding (shares) Preferred Stock, Shares Outstanding Income Tax Disclosure [Abstract] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Operating Loss Carryforwards by Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] U.S. state State and Local Jurisdiction [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Operating loss carryforwards Operating Loss Carryforwards Tax credit carryforward, amount Tax Credit Carryforward, Amount Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued U.S tax cost on unremitted foreign earnings Business Combinations [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Pre-tax charge related to sale of business Gain (Loss) on Disposition of Business Long term note receivable Accounts and Notes Receivable, Net Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] OFM Small Office Furniture Company [Member] Small Office Furniture Company [Member] Vermont Castings Group Vermont Castings Group [Member] [Member] Vermont Castings Group [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Office Furniture Office Furniture [Member] Office Furniture [Member]. Business Acquisition [Line Items] Business Acquisition [Line Items] Annual sales of company acquired Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period Acquisition cost Business Combination, Consideration Transferred Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Useful life Finite-Lived Intangible Asset, Useful Life Goodwill Goodwill Goodwill increase associated with acquisition Goodwill, Period Increase (Decrease) Cash paid for acquisition Payments to Acquire Businesses, Gross Purchase price allocation on intangible assets, other than goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Debt Disclosure [Abstract] 2017 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four 2021 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Valuation Allowance Summary of Valuation Allowance [Table Text Block] Summary of Income Tax Contingencies Summary of Income Tax Contingencies [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets by Major Class [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] Patents Patents [Member] Software Computer Software, Intangible Asset [Member] Trademarks and trade names Trademarks and Trade Names [Member] Customer lists and other Customer Relationships [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Net definite lived intangible assets Finite-Lived Intangible Assets, Net [Abstract] Gross Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Net Amortization expense Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Statement of Stockholders' Equity [Abstract] Cash dividends per share (dollars per share) Common Stock, Dividends, Per Share, Cash Paid Leases [Abstract] Operating Leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Rent expense Operating Leases, Rent Expense Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Manufacturing Facility Closing Facility Closing [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Colville, Washington Closure Of Colville, Washington Hearth Manufacturing Facility [Member] Closure of Colville, Washington Hearth Manufacturing Facility [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Expected savings Effect on Future Earnings, Amount Estimated pre-tax charges Restructuring and Related Cost, Expected Cost Compensation and Retirement Disclosure [Abstract] Components of Net Periodic Postretirement Benefit Cost Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Fiscal Year End Fiscal Period, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Cash, Cash Equivalents and Investments Cash, Cash Equivalents and Investments Policy [Policy Text Block] Cash, Cash Equivalents and Investments Policy [Policy Text Block] Receivables Receivables, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Product Warranties Standard Product Warranty, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Product Development Costs Research and Development Expense, Policy [Policy Text Block] Freight Expense Shipping and Handling Cost, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Self-Insurance Self Insurance Reserve [Policy Text Block] Foreign Currency Translations Foreign Currency Transactions and Translations Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Property, Plant and Equipment, Net [Abstract] Land and land improvements Land and Land Improvements [Member] Buildings Construction and equipment installation in progress Construction and Equipment Installation in Progress [Member] Construction and Equipment Installation in Progress [Member] Property, plant and equipment, gross 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 Depreciation Depreciation Statement of Financial Position [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS Assets, Current [Abstract] Receivables Accounts Receivable, Net, Current Inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total Current Assets Assets, Current PROPERTY, PLANT, AND EQUIPMENT Land and land improvements Land and Land Improvements Buildings Buildings and Improvements, Gross Machinery and equipment Machinery and Equipment, Gross Construction in progress Construction in Progress, Gross Property, Plant, and Equipment GOODWILL DEFERRED INCOME TAXES Deferred Tax Assets, Net, Noncurrent OTHER ASSETS Other Assets, Noncurrent Total Assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES Liabilities, Current [Abstract] Accounts payable and accrued expenses Current maturities of long-term debt Long-term Debt and Capital Lease Obligations, Current Current maturities of other long-term obligations Other Liabilities, Current Total Current Liabilities Liabilities, Current LONG-TERM DEBT Long-term Debt, Excluding Current Maturities OTHER LONG-TERM LIABILITIES Other Liabilities, Noncurrent DEFERRED INCOME TAXES Deferred Tax Liabilities, Net, Noncurrent EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] HNI Corporation shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock - $1 par value, authorized 2,000 shares, no shares outstanding Preferred Stock, Value, Outstanding Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total HNI Corporation shareholders’ equity Stockholders' Equity Attributable to Parent Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Total Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Liabilities and Equity Liabilities and Equity Inventory Disclosure [Abstract] Finished products Inventory, Finished Goods, Gross Materials and work in process Inventory, Work in Process and Raw Materials LIFO reserve Inventories, net Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Financing instruments, insurance policies and payment obligations Standby Letters of Credit [Member] Trade letters of credit and bankers' acceptances Trade Letters Of Credit And Bankers Acceptances [Member] Trade Letters Of Credit And Bankers Acceptances [Member] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Letters of credit Letters of Credit Outstanding, Amount Inventories Inventory Disclosure [Text Block] Preferred stock, par value (in dollars per share) Preferred stock, shares authorized (shares) Preferred stock, shares outstanding (shares) Common stock, par value (in dollars per share) Common stock, shares authorized (shares) Common stock, shares outstanding (shares) Restructuring and Related Activities [Abstract] Restructuring Related and Impairment Charges Restructuring and Related Activities Disclosure [Text Block] Segment Reporting [Abstract] Number of business segments Number of Reportable Segments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Operating Segments [Member] General corporate Corporate, Non-Segment [Member] Hearth Products Hearth Products [Member] Hearth Products [Member]. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net sales Revenue, Net Operating profit Segment Reporting Information Operating Profit Loss Segment Reporting Information, Operating Profit (Loss). Unallocated corporate expenses Segment Reporting Information Unallocated Corporate Expense Segment Reporting Information Unallocated Corporate Expense. Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Depreciation and amortization expense Depreciation, Depletion and Amortization Capital expenditures (including capitalized software) Payments to Acquire Productive Assets Identifiable assets Restructuring and impairment charges Restructuring, Settlement and Impairment Provisions Schedule of Finite-Lived Intangible Assets by Major Class Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Expected Amortization Expense Table Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Retirement Benefits Postemployment Benefits Disclosure [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassifications from accumulated other comprehensive income (loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Derivative financial instruments Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap Interest Rate Swap [Member] Diesel hedge Energy Related Derivative [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Interest income or (expense) Interest Income (Expense), Net Selling and administrative expenses Selling, General and Administrative Expense Tax (expense) or benefit Income Tax Expense (Benefit) Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Reconciliation of Unrecognized Tax Benefits [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits, beginning of period Unrecognized Tax Benefits Increases in positions taken in a prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases in positions taken in a prior period Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions New positions taken in a current period Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Decrease due to settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Decrease due to lapse of statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized tax benefits, end of period Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Schedule of Accumulated Other Comprehensive Income Loss Table Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule of Dividends Declared and Paid Per Share Schedule of Dividends Declared and Paid Per Share [Table Text Block] Schedule of Dividends Declared and Paid Per Share [Table Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Subsegments [Axis] Subsegments [Axis] Subsegment [Domain] Subsegments [Domain] Office furniture reporting unit one Reporting Unit One [Member] Reporting Unit One [Member] Office furniture reporting unit two Reporting Unit Two [Member] Reporting Unit Two [Member] Office furniture reporting unit three Reporting Unit Three [Member] Reporting Unit Three [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trademarks and trade names Trade Names [Member] Goodwill [Line Items] Goodwill [Line Items] Discount rate utilized for each reporting unit with rates range (percent) Discount Rate Utilized for Each Reporting Unit with Rates Range Discount Rate Utilized for Each Reporting Unit with Rates Range Near term growth (percent) Near Term Growth Utilized for Each Reporting Unit with Rates Range Near Term Growth Utilized for Each Reporting Unit with Rates Range Terminal growth (percent) Terminal Growth Utilized for Each Reporting Unit with Rates Range Terminal Growth Utilized for Each Reporting Unit with Rates Range Goodwill impairment Goodwill, Impairment Loss Decrease in reporting unit due to 100 basis point increase in discount rate Goodwill, Impairment Loss, Effect of One Hundred Basis Point Increase in Discount Rate Goodwill, Impairment Loss, Effect of One Hundred Basis Point Increase in Discount Rate Decrease in reporting unit due to 100 basis point decrease in long-term growth rate Goodwill, Impairment Loss, Effect of One Hundred Basis Point Decrease in Long-term Growth Rate Goodwill, Impairment Loss, Effect of One Hundred Basis Point Decrease in Long-term Growth Rate Intangible assets impairment Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Trade names, net value Indefinite-Lived Intangible Assets (Excluding Goodwill) Royalty rate (percent) Royalty Rate Utilized for Each Reporting Unit with Rates Range Royalty Rate Utilized for Each Reporting Unit with Rates Range Decrease in indefinite-lived trade name due to 50 decrease in royalty rate Impairment Of Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Loss, Effect of Fifty Basis Point Decrease in Royalty Rate Impairment Of Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Loss, Effect of Fifty Basis Point Decrease in Royalty Rate Decrease in indefinite-lived trade name due to 50 point decrease in terminal growth rate Impairment Of Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Loss, Effect of Fifty Basis Point Decrease in Terminal Growth Rate Impairment Of Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Loss, Effect of Fifty Basis Point Decrease in Terminal Growth Rate Fair value exceeds carrying value (percent) Fair Value Exceeds Carrying Value, Goodwill, Percent Fair Value Exceeds Carrying Value, Goodwill, Percent Decrease in fair value for every 100 basis point increase in discount rate Decrease in Fair Value for Every 100 Basis Point Increase in Discount Rate Decrease in Fair Value for Every 100 Basis Point Increase in Discount Rate Decrease in fair value for every 100 basis point decrease in long-term growth rate Decrease in Fair Value for Every 100 Basis Point Decrease in Long-term Growth Rate Decrease in Fair Value for Every 100 Basis Point Decrease in Long-term Growth Rate Capitalized software, amortization Capitalized Computer Software, Amortization Amortization expense for definite-lived intangibles Amortization of Intangible Assets Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Other postretirement plans Other Postretirement Benefit Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost Defined Benefit Plan, Service Cost In Year One Defined Benefit Plan, Service Cost In Year One Interest cost Defined Benefit Plan, Interest Cost In Year One Defined Benefit Plan, Interest Cost In Year One Amortization of net (gain)/loss Defined Benefit Plan, Amortization of Gains (Losses) In Year One Defined Benefit Plan, Amortization of Gains (Losses) In Year One Net periodic post-retirement benefit cost/(income) Defined Benefit Plan, Net Periodic Benefit Cost In Year One Defined Benefit Plan, Net Periodic Benefit Cost In Year One Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Fixed rate, long-term debt obligation Senior Notes Due In 2016 [Member] Senior Notes due in 2016, Fixed Rate 5.54% [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revolving commitment Revolving Credit Facility [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Hedging Instrument Designated as Hedging Instrument [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Variable rate long-term debt Long-term Debt, Percentage Bearing Variable Interest, Amount Long-term debt, fair value Long-term Debt, Fair Value Long-term debt, carrying value Long-term Debt Maximum line of credit facility borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Accordion feature Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Outstanding revolving credit facility Long-term Line of Credit Long-term revolving credit facility Long-term Line of Credit, Noncurrent Current revolving credit facility Line of Credit, Current Interest coverage ratio Ratio of Interest Coverage to Earnings for the Last Four Fiscal Quarters Ratio of Interest Coverage to Earnings for the Last Four Fiscal Quarters Consolidated leverage ratio Ratio of Leverage to Earnings for the Last Four Fiscal Quarters Ratio of Leverage to Earnings for the Last Four Fiscal Quarters Derivative notional amount Derivative, Notional Amount Derivative fixed rate Derivative, Fixed Interest Rate Fair value of interest rate swap net asset Derivative Asset Interest rate swap, net of tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax 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] Equity Award [Domain] RSUs Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Outstanding, Beginning Balance (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 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding, Ending Balance (shares) Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding, Beginning Balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars 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 Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding, Ending Balance (in dollars per share) Document and Entity Information [Abstract] Document and Entity Information [Abstract] 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Share Outstanding Entity Common Stock, Shares Outstanding Trading Symbol Trading Symbol Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Systems and storage Systems and Storage Products [Member] Systems and Storage Products [Member] Seating Seating Products [Member] Seating Products [Member] Other Other Product Category [Member] Other Product Category [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Income Statement [Abstract] Cost of sales Cost of Goods and Services Sold Gross profit Gross Profit (Gain) loss on sale of assets Gain (Loss) on Disposition of Assets Operating income Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Income taxes Less: Net income (loss) attributable to the non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to HNI Corporation Net Income (Loss) Attributable to Parent Net income attributable to HNI Corporation per common share – basic (in dollars per share) Earnings Per Share, Basic Weighted average shares outstanding – basic (shares) Weighted Average Number of Shares Outstanding, Basic Net income attributable to HNI Corporation per common share – diluted (in dollars per share) Earnings Per Share, Diluted Weighted average shares outstanding - diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Change in unrealized gains and (losses) on marketable securities (net of tax) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Change in pension and post-retirement liability (net of tax) Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Change in derivative financial instruments (net of tax) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Other comprehensive income (loss) (net of tax) Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive (loss) attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to HNI Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Allowance for doubtful accounts Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Long-Term Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Long-Term Inventory differences Deferred Tax Assets, Inventory Marketing accrual Deferred Tax Assets, Tax Deferred Expense, Marketing Reserves Deferred Tax Assets, Tax Deferred Expense, Marketing Reserves Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Accrued post-retirement benefit obligations Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Vacation accrual Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Compensated Absences Warranty accrual Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Other – net Deferred Tax Assets, Other, Long-Term Deferred Tax Assets, Other, Long-Term Total deferred tax assets Deferred Tax Assets, Gross, Noncurrent Deferred income Deferred Tax Liabilities, Tax Deferred Income Goodwill and other intangible assets Deferred Tax Liabilities, Goodwill and Intangible Assets Prepaids Deferred Tax Liabilities, Prepaid Expenses Tax over book depreciation Deferred Tax Liabilities, Property, Plant and Equipment Total deferred tax liabilities Deferred Tax Liabilities, Gross, Noncurrent Valuation allowance Deferred Tax Liabilities, Valuation Allowance Deferred Tax Liabilities, Valuation Allowance Total net deferred tax liabilities Deferred Tax Liabilities, Net Total net deferred tax liabilities Statement [Table] Statement [Table] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive (Loss)/Income AOCI Attributable to Parent [Member] Non- controlling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Comprehensive income: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] 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and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value measurements on a recurring basis Fair Value, Measurements, Recurring [Member] Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Government securities US Government Debt Securities [Member] Corporate bonds Corporate Debt Securities [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] Available-for-sale securities, fair value disclosure Available-for-sale Securities Derivative 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Maximum Amount Fair Value for Purchase of Common Stock Maximum Amount Fair Value for Purchase of Common Stock Common stock issued (shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Common stock issued at average price (in dollars per share) Common Stock Issued at Average Price Common Stock Issued at Average Price Shares available for future issuance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Change in control percentage Supplemental Unemployment Benefits, Change in Control, Change in Control Percentage Supplemental Unemployment Benefits, Change in Control, Change in Control Percentage Percent of board members Supplemental Unemployment Benefits, Change in Control, Percent of Board Members Threshold Not Recommended by Three Fourths of Incumbent Board Supplemental Unemployment Benefits, Change in Control, Percent of Board Members Threshold Not Recommended by Three Fourths 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loss on sale, retirement and impairment of long-lived assets and intangibles, net Net Loss On Sales Retirements And Impairments of Long Lived Assets And Intangibles Net Loss on Sales, Retirements and Impairments of Long-Lived Assets and Intangibles Other – net Other Noncash Income (Expense) Net increase (decrease) in operating assets and liabilities, net of acquisitions and divestitures Increase (Decrease) in Operating Capital Increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash flows from (to) operating activities Net Cash Provided by (Used in) Operating Activities Net Cash Flows From (To) Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Proceeds from sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Capitalized software Payments to Acquire Software Acquisition spending, net of cash acquired 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Securities Excess tax benefits from stock compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Dividends paid Payments of Dividends Net cash flows from (to) financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Defined benefit plan Pension Plan [Member] Annual contributions by employer Defined Contribution Plan, Employer Discretionary Contribution Amount Stock contributions by employer Defined Contribution Plan, Stock Contributions by Employer Defined Contribution Plan, Stock Contributions by Employer Pension expense Pension Expense Fiscal 2017 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 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for warranties issued during the period Standard Product Warranty Accrual, Increase for Warranties Issued Accrual (Recovery) related to pre-existing warranties Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Settlements made during the period Standard Product Warranty Accrual, Decrease for Payments Balance at the end of the period Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Current provision Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Deferred provision Deferred Income Tax Expense (Benefit) Total income tax expense Federal statutory tax expense Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State taxes, net of federal tax effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Credit for increasing research activities Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Deduction related to domestic production activities Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Goodwill Impairment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Change in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Other – net Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Property, Plant, and Equipment Property, Plant and Equipment Disclosure [Text Block] Valuation Allowance [Table] Valuation Allowance [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts Allowance for Doubtful Accounts [Member] Valuation Allowance [Line Items] Valuation Allowance [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at beginning of period Valuation Allowances and Reserves, Balance Charged to costs and expenses Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Amounts written off, net of recoveries and other adjustments Valuation Allowances and Reserves, Deductions Divestitures Valuation Allowances and Reserves, Divestitures Valuation Allowances and Reserves, Divestitures Balance at end of period Schedule of Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions 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benefit obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligation at beginning of year Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Benefits paid Defined Benefit Plan, Benefits Paid Actuarial (gain)/loss Defined Benefit Plan, Actuarial Gain (Loss) Benefit obligation at end of year Change in plan assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value at beginning of year Defined Benefit Plan, Fair Value of Plan Assets Actual return on assets Defined Benefit Plan, Actual Return on Plan Assets Employer contribution Defined Benefit Plan, Contributions by Employer Transferred out Defined Benefit Plan, Assets Transferred to (from) Plan Fair value at end of year Funded Status of Plan Defined Benefit Plan, Funded Status of Plan Amounts recognized in the Statement of Financial Position consist of: Pension and Other Postretirement 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Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Pension and Post-retirement Liabilities Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Derivative Financial Instruments Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Tax (expense) or benefit Other Comprehensive Income (Loss), Tax Amounts reclassified from accumulated other comprehensive income, net of tax Long-Term Debt Debt Disclosure [Text Block] Schedule Of Inventory Current Table Schedule of Inventory, Current [Table Text Block] Plan The Plan [Member] The Plan [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Cliff vesting Cliff Vesting [Member] Cliff Vesting [Member] Vesting period (years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Exercised period (years) Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period Stock-based compensation expense Allocated Share-based Compensation Expense Income tax benefit recognized Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Nonvested stock, weighted average recognition period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted-average grant-date fair value of option granted (in dollars per share) Share-based 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