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v2.3.0.11

Regulatory Update (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Jun. 30, 2011 | Dec. 31, 2010
Regulatory Update |  |
Guarantor support, total | $ 13.1 | $ 21.6
Guarantor support, exception taken | 12.7 | 18.0
Number of individual credit relationships incorporated into guarantor support analysis | 25 | 25
Guarantor support, offset by cash payments received | 2.1 |
Guarantor support, offset by increases in collateral values | 1.0 |
Guarantor support, offset by charge-offs or additional reserves | 5.4 |
Guarantor support, decline in value during the period | $ 8.5 |

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- Definition Guarantor Support, Decline In Value During The Period + Details
Name: | prk_GuarantorSupportDeclineInValueDuringPeriod
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition GuarantorSupportExceptionTaken + Details
Name: | prk_GuarantorSupportExceptionTaken
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Guarantor Support Offset By Cash Payments Received + Details
Name: | prk_GuarantorSupportOffsetByCashPaymentsReceived
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Guarantor Support Offset By Charge-Offs Or Additional Reserves + Details
Name: | prk_GuarantorSupportOffsetByChargeOffsOrAdditionalReserves
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Guarantor Support Offset By Increases In Collateral Values + Details
Name: | prk_GuarantorSupportOffsetByIncreasesInCollateralValues
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number Of Individual Credit Relationships + Details
Name: | prk_NumberOfIndividualCreditRelationships
Namespace Prefix: | prk
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | instant

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- Definition Regulatory Update [Abstract] + Details
Name: | prk_RegulatoryUpdateAbstract
Namespace Prefix: | prk
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Total Guarantor Support + Details
Name: | prk_TotalGuarantorSupport
Namespace Prefix: | prk
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant