Entity tax identification number Entity Tax Identification Number Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] 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] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Less than 1 EBP, Vested Percentage, Less than One Year of Service [Member] EBP, Vested Percentage, Less than One Year of Service Total investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Money market fund Money Market Funds [Member] Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Investment, Fair Value and NAV [Abstract] EBP, Employer Vesting Contribution [Domain] EBP, Employer Vesting Contribution [Domain] EBP, Employer Vesting Contribution [Domain] Excess Contribution Payable EBP, Excess Contribution Payable [Policy Text Block] Assets EBP, Asset [Abstract] 2 EBP, Vested Percentage, Two Years of Service [Member] EBP, Vested Percentage, Two Years of Service Statistical Measurement [Axis] Statistical Measurement [Axis] Additions to net assets attributed to: 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] Payment of Benefits EBP, Payment to Participant [Policy Text Block] Amendment Flag Amendment Flag 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] EBP, Employer Contribution, Vesting Schedule EBP, Employer Contribution, Vesting Schedule [Table Text Block] EBP, Employer Contribution, Vesting Schedule Shares held (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] Investments [Domain] Investments [Domain] Use of Estimates EBP, Use of Estimate [Policy Text Block] EBP, Schedule of Asset Held for Investment EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Risks and Uncertainties Concentrations EBP, Risk and Uncertainty [Text Block] Employer Employer contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Shares purchased (in shares) EBP, Investment, Purchased, Number of Shares Minimum Minimum [Member] Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Investment Type [Axis] Investment Type [Axis] Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation in fair value of investments 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 EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] 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] Revenue sharing income EBP, Revenue Sharing Income EBP, Revenue Sharing Income EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Home BancShares, Inc. 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 Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses and fees EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total assets EBP, Asset Held for Investment Vested Percentage EBP, Employer, Contribution Vesting Percentage EBP, Employer, Contribution Vesting Percentage Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] 4 EBP, Vested Percentage, Four Years of Service [Member] EBP, Vested Percentage, Four Years of Service EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] EBP, Employer Vesting Contribution [Axis] EBP, Employer Vesting Contribution [Axis] EBP, Employer Vesting Contribution Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Shares sold (in shares) EBP, Investment, Sold, Number of Shares Net increase per Form 5500 EBP, Form 5500 Caption, Net Income (Loss) EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) 5 EBP, Vested Percentage, Five Years of Service [Member] EBP, Vested Percentage, Five Years of Service Related-Party and Party-in-Interest 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] Excess contribution payable EBP, Excess Contribution Payable Total receivables EBP, Receivable Investments, at fair value: EBP, Investment, Fair Value [Abstract] Maximum number of outstanding loans at a time EBP, Note Receivable From Participant, Maximum Number of Outstanding Loans EBP, Note Receivable From Participant, Maximum Number of Outstanding Loans Benefit payments to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Total investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] 3 EBP, Vested Percentage, Three Years of Service [Member] EBP, Vested Percentage, Three Years of Service EBP, Tax Status [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Non-interest-bearing cash EBP, Noninterest-Bearing Cash EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Reconciliation of Financial Statements to Schedule H of Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Participant loan fund EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Valuation of Investments and Income (Loss) Recognition EBP, Investment [Policy Text Block] Document Type Document Type Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Forfeitures used to offset employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant 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] Liabilities: EBP, Liability [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Income Tax Status EBP, Tax Status [Text Block] EBP 002 EBP 002 [Member] EBP 002 Maximum borrowing to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Percentage of total investments EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Percentage EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] Notes Receivable EBP, Note Receivable from Participant [Policy Text Block] Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Dividends received EBP, Form 5500 Caption, Earnings on Investments, Total Dividends 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] Net assets available for benefits Net assets available for benefits – beginning of year Net assets available for benefits – end of year Net assets available for benefits EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Involuntary cash-out limit EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Unallocated forfeitures EBP, Forfeited Nonvested Account Employer contribution percentage EBP, Employer Contribution, Matching Percentage Net assets available for benefits per the Form 5500 EBP, Form 5500 Caption, Net Assets 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]