Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 27, 2020	Jun. 30, 2019
Cover page.
Entity Tax Identification Number	31-1179518
Entity Address, Address Line One	50 North Third Street,
Entity Address, City or Town	Newark,
Entity Address, Address Line Two	P.O. Box 3500
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43058-3500
City Area Code	(740)
Title of 12(b) Security	Common Shares, without par value
Local Phone Number	349-8451
Trading Symbol	PRK
Entity Voluntary Filers	No
Security Exchange Name	NYSEAMER
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 1,593,940,725
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		16,270,436
Amendment Flag	false
Document Fiscal Year Focus	2019
Entity Central Index Key	0000805676
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Registrant Name	PARK NATIONAL CORPORATION
Entity File Number	1-13006
Document Period End Date	Dec. 31, 2019
Document Annual Report	true
Document Type	10-K
Document Transition Report	false
Entity Incorporation, State or Country Code	OH