| Cover | Mar. 25, 2020 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Fiscal Year Focus | |
| Document Fiscal Period Focus | |
| Entity Central Index Key | 0000805676 |
| Document Period End Date | Mar. 25, 2020 |
| Entity Registrant Name | PARK NATIONAL CORPORATION |
| Entity Incorporation, State or Country Code | OH |
| Entity File Number | 1-13006 |
| Entity Tax Identification Number | 31-1179518 |
| Entity Address, Address Line One | 50 North Third Street, |
| Entity Address, Address Line Two | P.O. Box 3500, |
| Entity Address, City or Town | Newark, |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43058-3500 |
| City Area Code | (740) |
| Local Phone Number | 349-8451 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common shares, without par value |
| Trading Symbol | PRK |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
