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STOCKHOLDERS' EQUITY AND REGULATORY MATTERS | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
STOCKHOLDERS' EQUITY AND REGULATORY MATTERS | STOCKHOLDERS’ EQUITY AND REGULATORY MATTERS In January 2011, the Corporation offered shareholders the opportunity to participate in the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan. The plan provides registered holders of ACNB Corporation common stock with a convenient way to purchase additional shares of common stock by permitting participants in the plan to automatically reinvest cash dividends on all or a portion of the shares owned and to make quarterly voluntary cash payments under the terms of the plan. Participation in the plan is voluntary, and there are eligibility requirements to participate in the plan. During 2020, 20,015 shares were issued under this plan with proceeds in the amount of $493,000. During 2019, 17,324 shares were issued under this plan with proceeds in the amount of $501,000. Proceeds are used for general corporate purposes. The ACNB Corporation 2009 Restricted Stock Plan expired by its own terms after ten years on February 24, 2019. No further shares may be issued under this plan. Of the 200,000 shares of common stock authorized under this plan, 25,945 shares were issued. The remaining 174,055 shares were transferred to the ACNB Corporation 2018 Omnibus Stock Incentive Plan, which was approved and ratified on May 1, 2018. Under this plan awards shall not exceed, in the aggregate, 400,000 shares of common stock plus any shares that are authorized, but not issued, under the ACNB Corporation 2009 Restricted Stock Plan. The purpose of the plans were to provide employees and directors of the Bank who have responsibility for its growth with additional incentive by allowing them to acquire ownership in the Corporation and thereby encouraging them to contribute to the success of the Corporation. In 2020 and 2019, 19,472 and 16,115 shares, respectively, were issued under these plans. The acquisition of New Windsor Bancorp, Inc. resulted in 938,360 new ACNB shares issued to the New Windsor Bancorp, Inc. shareholders valued at $28,620,000 in 2017. The acquisition of FCBI resulted in 1,590,547 new ACNB shares of common stock issued to the FCBI shareholders valued at $57,721,000. The Corporation and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Corporation’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Corporation and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Corporation and the Bank to maintain minimum amounts and ratios (set forth below) of total and Tier 1 capital to average assets. The federal banking agencies issued final rules to implement the Basel III regulatory capital reforms and changes required by the Dodd-Frank Act. The phase-in period for community banking organizations began January 1, 2015, while larger institutions (generally those with assets of $250 billion or more) began compliance effective January 1, 2014. The final rules call for the following capital requirements: •a minimum ratio of common Tier 1 capital to risk-weighted assets of 4.5%; •a minimum ratio of Tier 1 capital to risk-weighted assets of 6.0%; •a minimum ratio of total capital to risk-weighted assets of 8.0%; and, •a minimum leverage ratio of 4.0%. In addition, the final rules establish a common equity Tier 1 capital conservation buffer of 2.5% of risk-weighted assets applicable to all banking organizations. If a banking organization fails to hold capital above the minimum capital ratios and the capital conservation buffer, it will be subject to certain restrictions on capital distributions and discretionary bonus payments. The 2.5% (after a 0.625% per year phase-in period) for the capital conservation and countercyclical capital buffers for all banking organizations began on January 1, 2016. The required capital conservation buffer was 2.5% at December 31, 2020. Management believes, as of December 31, 2020, that the Corporation and the Bank meet all capital adequacy requirements to which they are subject. As of December 31, 2020, the most recent notification from the federal banking regulators categorized the Bank as “well capitalized” under the regulatory framework for prompt corrective action. There are no subsequent conditions or events that management believes have changed the Bank’s category. The actual and required capital amounts and ratios were as follows:
| Actual |  | For Capital Adequacy Purposes |  | To be Well Capitalized under Prompt Corrective Action Provisions
Dollars in thousands | Amount |  | Ratio |  | Amount (1) |  | Ratio (1) |  | Amount |  | Ratio
CORPORATION |  |  |  |  |  |  |  |  |  |  |
As of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage ratio (to average assets) | $ | 224,605 |  |  | 8.90 | % |  | $ ≥100,892 |  |  | ≥4.0% |  | N/A |  | N/A
Common Tier 1 risk-based capital ratio (to risk-weighted assets) | 224,605 |  |  | 13.68 |  |  | ≥73,873 |  |  | ≥4.5 |  | N/A |  | N/A
Tier 1 risk-based capital ratio (to risk-weighted assets) | 224,605 |  |  | 13.68 |  |  | ≥98,498 |  |  | ≥6.0 |  | N/A |  | N/A
Total risk-based capital ratio (to risk-weighted assets) | 244,831 |  |  | 14.91 |  |  | ≥131,330 |  |  | ≥8.0 |  | N/A |  | N/A
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage ratio (to average assets) | $ | 176,403 |  |  | 10.19 | % |  | $ ≥69,239 |  |  | ≥4.0% |  | N/A |  | N/A
Common Tier 1 risk-based capital ratio (to risk-weighted assets) | 176,403 |  |  | 14.50 |  |  | ≥54,759 |  |  | ≥4.5 |  | N/A |  | N/A
Tier 1 risk-based capital ratio (to risk-weighted assets) | 176,403 |  |  | 14.50 |  |  | ≥73,012 |  |  | ≥6.0 |  | N/A |  | N/A
Total risk-based capital ratio (to risk-weighted assets) | 190,319 |  |  | 15.64 |  |  | ≥97,349 |  |  | ≥8.0 |  | N/A |  | N/A
BANK |  |  |  |  |  |  |  |  |  |  |
As of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage ratio (to average assets) | $ | 226,800 |  |  | 9.01 | % |  | $ ≥100,654 |  |  | ≥4.0% |  | $ ≥ | 125,818 |  |  | ≥5.0 | %
Common Tier 1 risk-based capital ratio (to risk-weighted assets) | 226,800 |  |  | 13.86 |  |  | ≥73,638 |  |  | ≥4.5 |  | 106,366 |  |  | ≥6.5 |
Tier 1 risk-based capital ratio (to risk-weighted assets) | 226,800 |  |  | 13.86 |  |  | ≥98,184 |  |  | ≥6.0 |  | 130,912 |  |  | ≥8.0 |
Total risk-based capital ratio (to risk-weighted assets) | 247,119 |  |  | 15.10 |  |  | ≥130,912 |  |  | ≥8.0 |  | 163,640 |  |  | ≥10.0 |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage ratio (to average assets) | $ | 171,179 |  |  | 9.93 | % |  | $ ≥68,982 |  |  | ≥4.0% |  | $ ≥86,228 |  |  | ≥5.0 | %
Common Tier 1 risk-based capital ratio (to risk-weighted assets) | 171,179 |  |  | 14.13 |  |  | ≥54,514 |  |  | ≥4.5 |  | ≥78,742 |  |  | ≥6.5 |
Tier 1 risk-based capital ratio (to risk-weighted assets) | 171,179 |  |  | 14.13 |  |  | ≥72,685 |  |  | ≥6.0 |  | ≥96,913 |  |  | ≥8.0 |
Total risk-based capital ratio (to risk-weighted assets) | 185,095 |  |  | 15.28 |  |  | ≥96,913 |  |  | ≥8.0 |  | ≥121,142 |  |  | ≥10.0 |
(1) Amounts and ratios do not include capital conservation buffer.

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- Definition The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1F -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958575-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958569-112826 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1D -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958573-112826 + Details
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