Loans Receivable and Loans Held-for-sale, Fair Value Disclosure

No definition available.

Name:	pebo_LoansReceivableAndLoansHeldForSaleFairValueDisclosure
Namespace Prefix:	pebo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

+ References

No definition available.

+ Details

Name:	us-gaap_CashSurrenderValueFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

No definition available.

+ Details

Name:	us-gaap_DepositsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 325
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809

+ Details

Name:	us-gaap_FederalReserveBankStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

+ Details

Name:	us-gaap_InterestRateDerivativeAssetsAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

+ Details

Name:	us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=75030709&loc=d3e39828-111592

+ Details

Name:	us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of investments classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f,g))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_OtherInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

+ Details

Name:	us-gaap_ServicingAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_ShorttermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

Name:	us-gaap_UnrealizedGainLossOnInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=pebo_BankIssuedTrustPreferredSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value of Financial Instruments (Assets Measured at Fair Value Recurring) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2018	Sep. 30, 2017
Recurring Basis
Unrealized Gain (Loss) on Investments	$ 6,500
Servicing Asset	2,305	$ 2,303
Cash and Cash Equivalents, Fair Value Disclosure	72,194	72,629
Available-for-sale securities	795,187	790,910
Held-to-maturity investment securities at fair value	41,213	39,440
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	28,132	28,132
Federal Reserve Bank Stock	10,179	10,179
Interest Rate Derivative Assets, at Fair Value	4,600	6,600
Interest Rate Derivative Liabilities, at Fair Value	3,200	3,900
Loans Receivable and Loans Held-for-sale, Fair Value Disclosure	2,274,194	2,297,373
Cash Surrender Value, Fair Value Disclosure	62,176	62,644	$ 62,644
Property, Plant, and Equipment, Fair Value Disclosure	52,510	56,247
Deposits, Fair Value Disclosure	2,730,071	2,809,738
Short-term Debt, Fair Value	209,628	203,494
Long-term Debt, Fair Value	142,108	119,817
Level 2
Recurring Basis
Held-to-maturity investment securities at fair value	41,213	39,440
Other Investments	38,371	39,285
States and political subdivisions
Recurring Basis
Available-for-sale securities	101,569	97,205
States and political subdivisions \| Level 1
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
States and political subdivisions \| Level 2
Recurring Basis
Held-to-maturity investment securities at fair value	4,417	4,300
States and political subdivisions \| Level 3
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
Residential mortgage-backed securities
Recurring Basis
Available-for-sale securities	673,664	681,746
Residential mortgage-backed securities \| Level 1
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
Residential mortgage-backed securities \| Level 2
Recurring Basis
Held-to-maturity investment securities at fair value	32,227	30,978
Residential mortgage-backed securities \| Level 3
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
Commercial mortgage-backed securities
Recurring Basis
Available-for-sale securities	6,976	6,864
Commercial mortgage-backed securities \| Level 1
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
Commercial mortgage-backed securities \| Level 2
Recurring Basis
Held-to-maturity investment securities at fair value	4,569	4,162
Commercial mortgage-backed securities \| Level 3
Recurring Basis
Held-to-maturity investment securities at fair value	0	0
Bank-issued trust preferred securities
Recurring Basis
Available-for-sale securities	5,129	5,095
Equity securities (a)
Recurring Basis
Available-for-sale securities	7,849
Other Investments	0	7,471
Recurring Basis [Member] \| Level 1
Recurring Basis
Available-for-sale securities	7,694	0
Recurring Basis [Member] \| Level 2
Recurring Basis
Available-for-sale securities	787,493	790,910
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	28,132	28,132
Federal Reserve Bank Stock	10,179	10,179
Interest Rate Derivative Assets, at Fair Value	4,594	6,633
Interest Rate Derivative Liabilities, at Fair Value	3,241	3,870
Recurring Basis [Member] \| Level 3
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| States and political subdivisions \| Level 1
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| States and political subdivisions \| Level 2
Recurring Basis
Available-for-sale securities	101,569	97,205
Recurring Basis [Member] \| States and political subdivisions \| Level 3
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Residential mortgage-backed securities \| Level 1
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Residential mortgage-backed securities \| Level 2
Recurring Basis
Available-for-sale securities	673,664	681,746
Recurring Basis [Member] \| Residential mortgage-backed securities \| Level 3
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Commercial mortgage-backed securities \| Level 1
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Commercial mortgage-backed securities \| Level 2
Recurring Basis
Available-for-sale securities	6,976	6,864
Recurring Basis [Member] \| Commercial mortgage-backed securities \| Level 3
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Bank-issued trust preferred securities \| Level 1
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Bank-issued trust preferred securities \| Level 2
Recurring Basis
Available-for-sale securities	5,129	5,095
Recurring Basis [Member] \| Bank-issued trust preferred securities \| Level 3
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] \| Equity securities (a) \| Level 1
Recurring Basis
Available-for-sale securities	7,694	0
Other Investments		7,311
Recurring Basis [Member] \| Equity securities (a) \| Level 2
Recurring Basis
Available-for-sale securities	155	0
Other Investments		160
Recurring Basis [Member] \| Equity securities (a) \| Level 3
Recurring Basis
Available-for-sale securities		0
Reported Value Measurement [Member]
Recurring Basis
Other Investments	38,371	39,285
Loans Receivable and Loans Held-for-sale, Fair Value Disclosure	2,338,344	2,383,530
Deposits, Fair Value Disclosure	2,730,330	2,813,181
Short-term Debt, Fair Value	209,491	203,475
Long-term Debt, Fair Value	$ 144,019	$ 123,481