At least 4 years but less than 5 years EBP, At Least 4 Years But Less Than 5 Years [Member] EBP, At Least 4 Years But Less Than 5 Years Entity tax identification number Entity Tax Identification Number Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Number of investments activity managed EBP, Number Of Investment Options Activity Managed EBP, Number Of Investment Options Activity Managed Forfeitures to offset plan administrative expenses EBP, Forfeited Nonvested Account, Decrease from Administrative Expense Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Total fully corrected under VFCP and PTE 2002-51 EBP, Schedule of Delinquent Participant Contribution, Corrected Payment of benefits EBP, Liability to Participant Maximum percentage of invested account balance to allow transfer EBP, Participant Contribution, Specific Fund Selection, Transfer Restrictions, Maximum Invested Account Balance, Percentage EBP, Participant Contribution, Specific Fund Selection, Transfer Restrictions, Maximum Invested Account Balance, Percentage EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Maximum pretax and after-tax contributions EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP 001 EBP 001 [Member] EBP 001 Self-directed brokerage EBP, Self-Directed Brokerage Account [Member] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Note receivable from participant, account, maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Note receivable from participant, account, minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Dividends EBP, Change In Net Asset Available For Benefit, Dividends EBP, Change In Net Asset Available For Benefit, Dividends Number of mutual funds activity managed EBP, Number Of Mutual Funds Activity Managed EBP, Number Of Mutual Funds Activity Managed Transfers to Company Stock EBP, Change In Net Asset Available For Benefit, Transfers To Company Stock EBP, Change In Net Asset Available For Benefit, Transfers To Company Stock Total investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Target Date Collective Investment Income Funds Target Date Collective Investment Income Funds [Member] Target Date Collective Investment Income Funds Money market funds Money Market Funds [Member] Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Plan Name [Domain] EBP, Plan Name [Domain] EBP, Plan Name [Domain] EBP, Investment, Fair Value and NAV [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] ADDITIONS EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Transfers related to merger EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Payment of Benefits EBP, Payment to Participant [Policy Text Block] Unfunded commitments to purchase investments EBP, Fair Value, Investment, NAV, Unfunded Commitment EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Delinquent Participant Contributions EBP, Delinquent Participant Contributions [Text Block] EBP, Delinquent Participant Contributions Amendment Flag Amendment Flag Participant contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution Minimum age to participate in ESOP EBP, Minimum Age To Participate In ESOP EBP, Minimum Age To Participate In ESOP Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Investment, number of shares (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Schedule of Fair Value Measurements EBP, Investment, Fair Value and NAV [Table Text Block] EBP, Contribution [Abstract] EBP, Participant-Directed EBP, Participant-Directed [Member] Plan merger receivable EBP, Plan Merger, Receivables EBP, Plan Merger, Receivables At least 3 years but less than 4 years EBP, At Least 3 Years But Less Than 4 Years [Member] EBP, At Least 3 Years But Less Than 4 Years Common stocks Common Stock [Member] Investments [Domain] Investments [Domain] Employer prior-year true-up contributions EBP, Employer Prior-Year True-Up Contributions EBP, Employer Prior-Year True-Up Contributions EBP, Master Trust [Abstract] Estimates and Assumptions EBP, Use of Estimate [Policy Text Block] Schedule H, Line 4i – Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employer cash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Minimum Minimum [Member] EBP, Schedule of Reportable Transaction [Abstract] Transfers from Company Stock EBP, Change In Net Asset Available For Benefit, Transfers From Company Stock EBP, Change In Net Asset Available For Benefit, Transfers From Company Stock Investment Type [Axis] Investment Type [Axis] Interest on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Employer noncash (HNI Corporation common stock) EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Noncash Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Employer matching contributions, net of forfeitures EBP, Employer Matching Contributions, Net Of Forfeitures EBP, Employer Matching Contributions, Net Of Forfeitures Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation in fair value of investments Net depreciation in fair value EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number Kimball International Retirement Plan Kimball International Retirement Plan [Member] Kimball International Retirement Plan EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan Administration of Plan Assets EBP, Description of Plan [Text Block] Contributions pending correction in VFCP EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Noncash company ownership contribution EBP, Noncash Company Ownership Contribution EBP, Noncash Company Ownership Contribution EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Employer, Common Stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Allowance for credit losses EBP, Note Receivable from Participant, Allowance for Credit Loss Note receivable from participant, account, borrowing term EBP, Note Receivable From Participant, Account, Borrowing Term EBP, Note Receivable From Participant, Account, Borrowing Term EBP, Schedule of Reportable Transaction [Table] EBP, Schedule of Reportable Transaction [Table] Investment Income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses Expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total assets held at end of year EBP, Asset Held for Investment Outdoor Greatroom (OG) Plan Outdoor Greatroom (OG) Plan [Member] Outdoor Greatroom (OG) Plan Concentration of Credit Risk EBP, Risk and Uncertainty [Policy Text Block] Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] EBP, Schedule of Reportable Transaction [Line Items] EBP, Schedule of Reportable Transaction [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Plan merger, total receivables EBP, Merger Receivables EBP, Merger Receivables EBP, Contribution [Table] EBP, Contribution [Table] Contributions corrected outside of VFCP EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP EBP, Tax Status [Table] EBP, Tax Status [Table] NET INCREASE IN ASSETS AVAILABLE FOR BENEFITS EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related-Party Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total receivables Total receivables EBP, Receivable Employer contributions EBP, Employer Contribution, Receivable Participant contribution, automatic, deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Dividend income EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment At least 1 year but less than 2 years EBP, At Least 1 Year But Less Than 2 Years [Member] EBP, At Least 1 Year But Less Than 2 Years Benefits paid to participants Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Noncash company ownership true-up contributions EBP, Noncash Company Ownership True-Up Contributions EBP, Noncash Company Ownership True-Up Contributions Market value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Employer remitted participant deferrals EBP, Schedule of Delinquent Participant Contribution, Transferred Late to Plan Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 5 years or more EBP, 5 Years Or More [Member] EBP, 5 Years Or More EBP, Statement of Net Asset Available for Benefit [Abstract] Matching contribution - cash EBP, Change In Net Asset Available For Benefit, Matching Contribution EBP, Change In Net Asset Available For Benefit, Matching Contribution EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Plan merger, cash receivables transferred EBP, Plan Merger, Cash Receivables Transferred EBP, Plan Merger, Cash Receivables Transferred EBP, Tax Status [Abstract] Schedule of Changes in Net Assets Related to Company Stock EBP, Contribution [Table Text Block] Administrative Expenses EBP, Expense [Policy Text Block] Note receivable from participant, account, basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate LOANS TO PARTICIPANTS (maturing from 2026 - 2040, with interest rates from 4.25% to 10.50%) EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] EBP, Schedule of Allocation, Income and Change in Plan Equity [Abstract] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key EBP, Employer Contribution, Vesting Serivce [Axis] EBP, Employer Contribution, Vesting Serivce [Axis] EBP, Employer Contribution, Vesting Serivce Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] Company Stock EBP, Contribution [Text Block] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] DEDUCTIONS EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Forfeitures to offset plan employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant Plan merger, notes receivable transferred EBP, Plan Merger, Notes Receivable Transferred EBP, Plan Merger, Notes Receivable Transferred Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Subsequent Event [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Schedule H, Line 4a – Schedule of Delinquent Participant Contributions EBP, Schedule of Delinquent Participant Contribution [Text Block] Investment, common stock of the company, with a cost basis Cost EBP, Investment, Excluding Plan Interest in Master Trust, Cost Federal Income Tax Status EBP, Tax Status [Text Block] Participant contribution, automatic, annual increase deferral rate EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate EBP, Contribution [Line Items] EBP, Contribution [Line Items] Note receivable from participant, account, maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Vesting percentage EBP, Employer Contribution, Annual Vesting Percentage After Requisite Service Period EBP, Employer Contribution, Annual Vesting Percentage After Requisite Service Period Less than 1 year EBP, Less Than 1 Year [Member] EBP, Less Than 1 Year At least 2 years but less than 3 years EBP, At Least 2 Years But Less Than 3 Years [Member] EBP, At Least 2 Years But Less Than 3 Years EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Employer Contribution, Vesting Serivce [Domain] EBP, Employer Contribution, Vesting Serivce [Domain] EBP, Employer Contribution, Vesting Serivce [Domain] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] Document Information [Table] Document Information [Table] EBP, Nonparticipant-Directed EBP, Nonparticipant-Directed [Member] EBP, Plan Name [Axis] EBP, Plan Name [Axis] EBP, Plan Name Schedule of Vested Percentage EBP, Schedule Of Vested Percentage [Table Text Block] EBP, Schedule Of Vested Percentage Net investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] Contributions not corrected EBP, Schedule of Delinquent Participant Contribution, Not Corrected Primary residence, borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Other EBP, Other Receivable NET ASSETS AVAILABLE FOR BENEFITS Beginning of year End of year Net assets available for benefits EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] EBP, Mutual Fund EBP, Mutual Fund [Member] EBP, Mutual Fund Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Company ownership non-cash contribution EBP, Change In Net Asset Available For Benefit, Company Ownership Contribution EBP, Change In Net Asset Available For Benefit, Company Ownership Contribution Unallocated plan assets EBP, Forfeited Nonvested Account Investments measured at net asset value Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]