Statistical Measurement [Domain] Statistical Measurement [Domain] Party-in-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Document Information [Line Items] Document Information [Line Items] Peoples Bancorp Inc. Common Stock Fund Units EBP, Employer, Common Stock Fund [Member] Maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] EBP, Description of Plan and Accounting Change [Abstract] Less: Employer's contribution receivable at December 31, 2025 EBP, Reconciliation To Form 5500, Current Period, Decrease From Employer Contribution EBP, Reconciliation To Form 5500, Current Period, Decrease From Employer Contribution Investment Type [Axis] Investment Type [Axis] Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Investment, number of shares (in shares) Description of investment (in shares) EBP, Investment, Number of Shares EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Percentage of assets held in the Plan EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage Value per share (in dollars per share) EBP, Investment, Value Per Share Or Unit EBP, Investment, Value Per Share Or Unit EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Participant loan, current value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Net assets available for benefits per Form 5500 EBP, Form 5500 Caption, Net Assets Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP 002 EBP 002 [Member] EBP 002 EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Benefits paid to participants Benefits paid to participants per the financial statements EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Employer’s contributions receivable EBP, Employer Contribution, Receivable General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Payment of Benefits EBP, Payment to Participant [Policy Text Block] 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 per the financial statements EBP, Net Asset Available for Benefit EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] Schedule of Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Amount held in cash EBP, Investment, Amount Held In Cash EBP, Investment, Amount Held In Cash Balances paid to participants per Form 5500 EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits Common Stock EBP, Employer, Common Stock [Member] Automatic deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Cover [Abstract] Maximum Maximum [Member] Employer Employer's contributions per the financial statements EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] Assets: EBP, Asset [Abstract] Minimum Minimum [Member] Dividends received EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, Schedule of Asset Held for Investment [Abstract] Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Entity [Domain] Entity [Domain] Assets held at end of year EBP, Asset Held for Investment Investment, Identifier [Axis] Investment, Identifier [Axis] Plan Tax Status EBP, Plan Tax Status [Policy Text Block] EBP, Plan Tax Status Transfers of assets EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan EBP, Investment, Fair Value and NAV [Abstract] Matching percentage EBP, Employer Contribution, Matching Percentage Method of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Accounting Standard Update and Change in Accounting Principle [Table] EBP, Accounting Standard Update and Change in Accounting Principle [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Mutual funds Mutual Fund [Member] EBP, Description of Plan [Table] EBP, Description of Plan [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Valuation of Investments and Income Recognition EBP, Investment [Policy Text Block] Employer's contributions per Form 5500 EBP, Form 5500 Caption, Contributions, Employers Amendment Flag Amendment Flag Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Schedule of Fair Value Measurements EBP, Investment, Fair Value and NAV [Table Text Block] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Current value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Related Party and Party-in-Interest Transactions [Abstract] Investment, percentage held in cash for liquidity EBP, Investment, Percentage Held In Cash EBP, Investment, Percentage Held In Cash EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Vanguard 500 Index Admiral Fund EBP, Vanguard 500 Index Admiral Fund [Member] EBP, Vanguard 500 Index Admiral Fund EBP, Statement of Net Asset Available for Benefit [Abstract] Deemed participant loans EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Description of the Plan EBP, Description of Plan [Text Block] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] 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 Total increase EBP, Change in Net Asset Available for Benefit, Increase EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal Entity [Axis] Legal Entity [Axis] Entity tax identification number Entity Tax Identification Number Net investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Add: Employer's contribution receivable at December 31, 2024 EBP, Reconciliation To Form 5500, Prior Period, Increase From Employer Contribution EBP, Reconciliation To Form 5500, Prior Period, Increase From Employer Contribution EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Plan number EBP, Plan Number Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Document Type Document Type (Level 3) Fair Value, Inputs, Level 3 [Member] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Investments EBP, Investment [Text Block] EBP, Investment EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Use of Estimates EBP, Use of Estimate [Policy Text Block] Vanguard Growth Index Admiral Fund EBP, Vanguard Growth Index Admiral Fund [Member] EBP, Vanguard Growth Index Admiral Fund EBP, Fully Benefit-Responsive Investment Contract [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Deductions: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Notes receivable from participants EBP, Note Receivable from Participant (Level 2) Fair Value, Inputs, Level 2 [Member] Schedule H, Line 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Table Text Block] Distributed participant loans EBP, Reconciliation To Form 5500, Payment To Participant, Increase (Decrease) From Distributed Participant Loan EBP, Reconciliation To Form 5500, Payment To Participant, Increase (Decrease) From Distributed Participant Loan Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Investments [Domain] Investments [Domain] Document Information [Table] Document Information [Table] 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, Risk and Uncertainty [Abstract] (Level 1) Fair Value, Inputs, Level 1 [Member] Entity Registrant Name Entity Registrant Name Employer's contribution receivable EBP, Reconciliation To Form 5500, Net Asset Available For Benefit, Employer's Contribution EBP, Reconciliation To Form 5500, Net Asset Available For Benefit, Employer's Contribution Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] EBP, Accounting Standard Update and Change in Accounting Principle [Line Items] EBP, Accounting Standard Update and Change in Accounting Principle [Line Items] Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage Risks and Uncertainties EBP, Risk and Uncertainty [Text Block]