Capital Ratios (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	0.0250
Park National Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital to Average Assets	0.0858	0.0859
Tier One Risk Based Capital to Risk Weighted Assets	0.1105	0.1066
Common Equity Tier 1	0.1105	0.1066
Capital to Risk Weighted Assets	0.1256	0.1216
Leverage Capital Required For Capital Adequacy To Average Total Assets	0.0400	0.0400
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0450	0.0450
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Common Equity Tier One Capital Required to be Well-Capitalized	$ 485,139	$ 476,746
Leverage Capital Required To Be Well Capitalized To Average Total Assets	0.0500	0.0500
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0800	0.0800
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Capital Required for Capital Adequacy	$ 597,094	$ 586,764
Capital Required to be Well Capitalized	746,368	733,455
Tier One Risk Based Capital	825,045	782,148
Tier One Risk Based Capital Required for Capital Adequacy	447,821	440,073
Tier One Risk Based Capital Required to be Well Capitalized	597,094	586,764
Tier One Leverage Capital	825,045	782,148
Tier One Leverage Capital Required for Capital Adequacy	384,582	364,079
Tier One Leverage Capital Required to be Well Capitalized	480,728	455,098
Common Equity Tier One Capital	825,045	782,148
Common Equity Tier One Capital Required for Capital Adequacy	$ 335,866	$ 330,055
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	0.0650	0.0650
Banking Regulation, Total Capital, Actual	$ 937,438	$ 891,585
Park
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital to Average Assets	0.0977	0.0963
Tier One Risk Based Capital to Risk Weighted Assets	0.1257	0.1192
Common Equity Tier 1	0.1237	0.1172
Capital to Risk Weighted Assets	0.1605	0.1543
Leverage Capital Required For Capital Adequacy To Average Total Assets	0.0400	0.0400
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0450	0.0450
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Leverage Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	4.00%	4.00%
Tier One Risk Based Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	8.50%	8.50%
Common Equity Tier 1 Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	7.00%	7.00%
Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	10.50%	10.50%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0600	0.0600
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Capital Required for Capital Adequacy	$ 599,102	$ 589,619
Capital Required to be Well Capitalized	748,878	737,023
Tier One Risk Based Capital	941,536	878,740
Tier One Risk Based Capital Required for Capital Adequacy	449,327	442,214
Tier One Risk Based Capital Required to be Well Capitalized	449,327	442,214
Tier One Leverage Capital	941,536	878,740
Tier One Leverage Capital Required for Capital Adequacy	385,313	365,143
Common Equity Tier One Capital	926,536	863,740
Common Equity Tier One Capital Required for Capital Adequacy	336,995	331,661
Banking Regulation, Total Capital, Actual	$ 1,202,225	$ 1,137,305