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Regulatory Capital Matters (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Common equity tier 1 capital ratio
Actual, Amount	$ 253,014	$ 247,395
Actual, Ratio	12.26%	12.94%
Requirement for Capital Adequacy Purposes, Amount	$ 92,891	$ 86,039
Requirement for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Total risk based capital ratio
Actual, Amount	$ 277,167	$ 264,188
Actual, Ratio	13.43%	13.82%
Requirement for Capital Adequacy Purposes, Amount	$ 165,139	$ 152,958
Requirement for Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 risk based capital ratio
Actual, Amount	$ 262,215	$ 249,701
Actual, Ratio	12.70%	13.06%
Requirement for Capital Adequacy Purposes, Amount	$ 123,854	$ 114,719
Requirement for Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 leverage ratio
Actual, Amount	$ 262,215	$ 249,701
Actual, Ratio	10.18%	10.69%
Requirement for Capital Adequacy Purposes, Amount	$ 103,016	$ 93,406
Requirement for Capital Adequacy Purposes, Ratio	4.00%	4.00%
Farmers National Banc Corp
Common equity tier 1 capital ratio
Actual, Amount	$ 240,670	$ 213,507
Actual, Ratio	11.57%	11.19%
Requirement for Capital Adequacy Purposes, Amount	$ 93,568	$ 85,854
Requirement for Capital Adequacy Purposes, Ratio	4.50%	4.50%
To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 135,154	$ 124,011
To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Total risk based capital ratio
Actual, Amount	$ 255,622	$ 227,994
Actual, Ratio	12.29%	11.95%
Requirement for Capital Adequacy Purposes, Amount	$ 166,344	$ 152,629
Requirement for Capital Adequacy Purposes, Ratio	8.00%	8.00%
To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 207,929	$ 190,787
To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 risk based capital ratio
Actual, Amount	$ 240,670	$ 213,507
Actual, Ratio	11.57%	11.19%
Requirement for Capital Adequacy Purposes, Amount	$ 124,758	$ 114,472
Requirement for Capital Adequacy Purposes, Ratio	6.00%	6.00%
To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 166,344	$ 152,629
To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Tier 1 leverage ratio
Actual, Amount	$ 240,670	$ 213,507
Actual, Ratio	9.34%	9.06%
Requirement for Capital Adequacy Purposes, Amount	$ 103,052	$ 94,304
Requirement for Capital Adequacy Purposes, Ratio	4.00%	4.00%
To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 128,815	$ 117,881
To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

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The amount of total capital as defined in the regulations.

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