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Capital Ratios - Capital Ratios for Park and Each Subsidiary (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Capital Conservation Buffer | 0.625% |
Park National Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Risk-Based Capital | 9.87% | 9.83%
Tier One Risk Based Capital Required for Capital Adequacy | $ 324,115 | $ 310,560
Common Equity Tier 1 | 9.87% | 9.83%
Common Equity Tier 1 Capital Required For Capital Adequacy | $ 243,086 | $ 232,920
Total Risk-Based | 11.24% | 11.37%
Capital Required for Capital Adequacy | $ 432,153 | $ 414,079
Leverage Capital Required For Capital Adequacy To Average Total Assets | 4.00% | 4.00%
Common Equity Tier 1 Capital | $ 533,215 | $ 508,763
Leverage Capital Required To Be Well Capitalized | $ 363,339 | $ 360,183
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 6.00% | 6.00%
Leverage Capital | $ 533,215 | $ 508,763
Tier One Risk Based Capital Required to be Well Capitalized | $ 432,153 | $ 414,079
Common Equity Tier 1 Capital Required For Capital Adequacy To Average Total Assets | 4.50% | 4.50%
Common Equity Tier 1 Capital Required To Be Well Capitalized | $ 351,125 | $ 336,439
Leverage | 7.34% | 7.06%
Leverage Capital Required For Capital Adequacy | $ 290,671 | $ 288,147
Capital Required for Capital Adequacy to Risk Weighted Assets | 8.00% | 8.00%
Capital Required to be Well Capitalized | $ 540,192 | $ 517,599
Tier One Risk Based Capital | $ 533,215 | $ 508,763
Common Equity Tier 1 Capital Required To Be Well Capitalized To Average Total Assets | 6.50% | 6.50%
Risk Based Capital | $ 607,269 | $ 588,467
Leverage Capital Required To Be Well Capitalized To Average Total Assets | 5.00% | 5.00%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 8.00% | 8.00%
Capital Required to be Well Capitalized to Risk Weighted Assets | 10.00% | 10.00%
Park |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Risk-Based Capital | 12.83% | 12.82%
Tier One Risk Based Capital Required for Capital Adequacy | $ 328,673 | $ 314,310
Common Equity Tier 1 | 12.55% | 12.54%
Common Equity Tier 1 Capital Required For Capital Adequacy | $ 246,505 | $ 235,732
Total Risk-Based | 14.32% | 14.49%
Capital Required for Capital Adequacy | $ 438,231 | $ 419,080
Leverage Capital Required For Capital Adequacy To Average Total Assets | 4.00% | 4.00%
Common Equity Tier 1 Capital | $ 687,651 | $ 656,664
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 6.00% | 6.00%
Leverage Capital | $ 702,651 | $ 671,664
Common Equity Tier 1 Capital Required For Capital Adequacy To Average Total Assets | 4.50% | 4.50%
Leverage | 9.56% | 9.22%
Leverage Capital Required For Capital Adequacy | $ 293,916 | $ 291,449
Capital Required for Capital Adequacy to Risk Weighted Assets | 8.00% | 8.00%
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 | $ 702,651 | $ 671,664
Risk Based Capital | $ 784,406 | $ 758,988

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