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Loans - Recorded Investment in Financing Receivable Modified as TDR Within 12 Month (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 contracts | Dec. 31, 2012 contracts
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 132 | 208
Recorded Investment | $ 7,379 | $ 8,879
Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 11 | 8
Recorded Investment | 771 | 244
Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 11 | 10
Recorded Investment | 2,839 | 2,113
SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 0 | 7
Recorded Investment |  | 970
Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 0 | 4
Recorded Investment |  | 1,476
Mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 0 | 1
Recorded Investment | 0 | 85
Installment |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 1 | 1
Recorded Investment | 10 | 27
Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 4 | 1
Recorded Investment | 1,683 | 16
Mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 26 | 39
Recorded Investment | 1,533 | 2,863
HELOC |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 0 | 5
Recorded Investment |  | 70
Installment |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 5 | 9
Recorded Investment | 72 | 272
Leases |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 74 | 123
Recorded Investment | 471 | 743
Leases |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Contracts | 0 | 0
Recorded Investment | $ 0 |

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- Definition Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period + References No definition available. + Details
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Namespace Prefix: | prk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period + References No definition available. + Details
Name: | prk_FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentDuringPeriod
Namespace Prefix: | prk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration