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Loans (Recorded Investment By Loan Grade) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment $ 4,844,496prk_LoansAndLeasesReceivableRecordedInvestment $ 4,843,311prk_LoansAndLeasesReceivableRecordedInvestment
Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 413,758prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember		 418,650prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 1,074,794prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 [1] 1,073,183prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 [1]
Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 3,242prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		 3,188prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
5 Rated [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 21,597us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 16,252us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember
5 Rated [Member] | Remaining Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 4,006us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 3,349us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember
5 Rated [Member] | Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 2,185us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 2,581us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember
5 Rated [Member] | Commercial, Financial, and Agricultural [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 3,017us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 [2] 1,874us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 [2]
5 Rated [Member] | Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 12,389us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 [2] 8,448us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 [2]
5 Rated [Member] | Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember		 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_FiveRatedMember
6 Rated [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 2,527us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 3,568us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember
6 Rated [Member] | SEPH Commercial Land and Development [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2] 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2]
6 Rated [Member] | Remaining Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment   57us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember
6 Rated [Member] | Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 436us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 598us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember
6 Rated [Member] | Commercial, Financial, and Agricultural [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 595us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2] 1,201us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2]
6 Rated [Member] | Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 1,496us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2] 1,712us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 [2]
6 Rated [Member] | Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember		 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_SixRatedMember
Impaired [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 70,499us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 73,729us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember
Impaired [Member] | SEPH Commercial Land and Development [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 2,077us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2] 2,078us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2]
Impaired [Member] | Remaining Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 5,725us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 5,609us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember
Impaired [Member] | Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 25,219us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 24,930us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember
Impaired [Member] | Commercial, Financial, and Agricultural [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 20,578us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2] 19,123us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2]
Impaired [Member] | Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 16,900us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2] 21,989us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 [2]
Impaired [Member] | Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember		 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_ImpairedMember
Pass Rated [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 2,357,065us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 2,378,859us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass Rated [Member] | SEPH Commercial Land and Development [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 106us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2] 117us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2]
Pass Rated [Member] | Remaining Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 100,382us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 106,424us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass Rated [Member] | Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 385,918us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 390,541us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass Rated [Member] | Commercial, Financial, and Agricultural [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 823,408us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2] 837,555us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2]
Pass Rated [Member] | Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 1,044,009us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2] 1,041,034us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 [2]
Pass Rated [Member] | Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total ending loan balance, recorded investment 3,242us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 3,188us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Recorded Investment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 2,451,688prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 2,472,408prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember
Recorded Investment [Member] | SEPH Commercial Land and Development [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 2,183prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2] 2,195prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_SephCommercialLandAndDevelopmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2]
Recorded Investment [Member] | Remaining Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 110,113prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 115,439prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_RemainingCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember
Recorded Investment [Member] | Residential Real Estate - Commercial [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 413,758prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 418,650prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= prk_ResidentialRealEstateCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember
Recorded Investment [Member] | Commercial, Financial, and Agricultural [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 847,598prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2] 859,753prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= prk_CommercialFinancialAgriculturalMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2]
Recorded Investment [Member] | Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment 1,074,794prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2] 1,073,183prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 [2]
Recorded Investment [Member] | Leases [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded Investment $ 3,242prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember		 $ 3,188prk_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= prk_RecordedInvestmentMember
[1] Included within commercial, financial and agricultural loans, commercial real estate loans, and SEPH commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.
[2] * Included within commercial, financial and agricultural loans, commercial real estate loans, and SEPH commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.