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Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Statement of Comprehensive Income [Abstract] |  |
Unrealized net holding gain on securities available-for-sale, Tax expense (benefit) | $ 4,232 prk_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesIncludingReclassificationAdjustmentTax | $ 5,891 prk_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesIncludingReclassificationAdjustmentTax

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- Definition Other Comprehensive Income Loss Available For Sale Securities Including Reclassification Adjustment Tax + References No definition available. + Details
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Namespace Prefix: | prk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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