Investment Securities (Available-for-sale Securities by Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	$ 248
Debt securities, maturing 1 to 5 years, amortized cost	17,997
Debt securities, maturing 5 to 10 years, amortized cost	88,136
Available-for-sale securities, maturing over 10 years, amortized cost	622,665
Amortized Cost	730,632	$ 632,967
Debt securities, maturing within 1 year, fair value	251
Debt securities, maturing 1 to 5 years, fair value	18,310
Debt securities, maturing 5 to 10 years, fair value	88,909
Available-for-sale securities, maturing over 10 years, fair value	622,246
Fair Value	$ 736,220	636,880
Available-for-sale securities, maturing within 1 year, average yield	4.79%
Available-for-sale securities, maturing 1 to 5 years, average yield	2.69%
Available-for-sale securities, maturing 5 to 10 years, average yield	2.83%
Available-for-sale securities, maturing over 10 years, average yield	2.67%
Available-for-sale securities, total average yield	2.70%
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	$ 0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	0
Debt securities, total amortized cost	0
Amortized Cost	0	1
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	0
Debt securities, total fair value	0
Fair Value	0	1
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	987
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	2,898
Debt securities, total amortized cost	3,885
Amortized Cost	3,885	5,836
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	999
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	2,935
Debt securities, total fair value	3,934
Fair Value	3,934	5,950
States and political subdivisions
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	248
Debt securities, maturing 1 to 5 years, amortized cost	6,367
Debt securities, maturing 5 to 10 years, amortized cost	30,911
Debt securities, maturing over 10 years, amortized cost	74,660
Debt securities, total amortized cost	112,186
Amortized Cost	112,186	62,292
Debt securities, maturing within 1 year, fair value	251
Debt securities, maturing 1 to 5 years, fair value	6,632
Debt securities, maturing 5 to 10 years, fair value	31,596
Debt securities, maturing over 10 years, fair value	75,734
Debt securities, total fair value	114,213
Fair Value	114,213	64,743
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	10,643
Debt securities, maturing 5 to 10 years, amortized cost	34,309
Debt securities, maturing over 10 years, amortized cost	535,627
Debt securities, total amortized cost	580,579
Amortized Cost	580,579	529,245
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	10,679
Debt securities, maturing 5 to 10 years, fair value	34,542
Debt securities, maturing over 10 years, fair value	534,480
Debt securities, total fair value	579,701
Fair Value	579,701	527,291
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	22,916
Debt securities, maturing over 10 years, amortized cost	4,346
Debt securities, total amortized cost	27,262
Amortized Cost	27,262	28,021
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	22,771
Debt securities, maturing over 10 years, fair value	4,429
Debt securities, total fair value	27,200
Fair Value	27,200	27,847
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Other securities, maturing over 10 years, amortized cost	5,134
Other securities, total amortized cost	5,134
Amortized Cost	5,134	6,132
Other securities, maturing over 10 years, fair value	4,668
Other securities, total fair value	4,668
Fair Value	4,668	5,645
Equity securities
Schedule of Available-for-sale Securities
Other securities, total amortized cost	1,586
Amortized Cost	1,586	1,440
Other securities, total fair value	6,504
Fair Value	$ 6,504	$ 5,403

Available-for-sale Securities, Average Yield

No definition available.

Name:	pebo_AvailableForSaleSecuritiesAverageYield
Namespace Prefix:	pebo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Maturities, Next Rolling Twelve Months, Average Yield

+ References

No definition available.

+ Details

Name:	pebo_AvailableForSaleSecuritiesMaturitiesNextRollingTwelveMonthsAverageYield
Namespace Prefix:	pebo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Maturities, Rolling after Year Ten, Amortized Cost Basis

+ References

No definition available.

+ Details

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

- Definition

Available-for-sale Securities, Maturities, Rolling after Year Ten, Average Yield

+ References

No definition available.

+ Details

Name:	pebo_AvailableForSaleSecuritiesMaturitiesRollingAfterYearTenAverageYield
Namespace Prefix:	pebo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Maturities, Rolling after Year Ten, Fair Value

+ References

No definition available.

+ Details

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

- Definition

Available-for-sale Securities, Maturities, Rolling Year Six Through Ten, Average Yield

+ References

No definition available.

+ Details

Name:	pebo_AvailableForSaleSecuritiesMaturitiesRollingYearSixThroughTenAverageYield
Namespace Prefix:	pebo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Maturities, Rolling Year Two Through Five, Average Yield

+ References

No definition available.

+ Details

Name:	pebo_AvailableForSaleSecuritiesMaturitiesRollingYearTwoThroughFiveAverageYield
Namespace Prefix:	pebo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Other Maturities, Amortized Cost Basis

+ References

No definition available.

+ Details

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

- Definition

Available-for-sale Securities, Other Maturities, Fair Value

+ References

No definition available.

+ Details

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

- Definition

Available-for-sale Securities, Other Maturities, Rolling after Year Ten, Amortized Cost Basis

+ References

No definition available.

+ Details

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

- Definition

Available-for-sale Securities, Other Maturities, Rolling after Year Ten, Fair Value

+ References

No definition available.

+ Details

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

- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
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=28360136&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=27724398&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=6871852&loc=d3e26610-111562

+ Details

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

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ 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 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing after the tenth rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Fair value of available-for-sale debt securities maturing after the tenth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth through tenth rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Fair value of available-for-sale debt securities maturing in the sixth through tenth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing in the second through fifth rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Fair value of available-for-sale debt securities maturing in the second through fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 320

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

+ Details

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

- Definition

Amount of debt 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=28360136&loc=d3e22054-111558

Reference 2: 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=6871852&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 320

-Section 50

-Paragraph 2

-Subparagraph (b)-(g)

-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
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_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: