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REGULATORY CAPITAL MATTERS (Details) | 12 Months Ended |
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Dec. 31, 2021 | Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual, Ratio (as a percent) | 4.5 | 7.0
Tier One Risk Based Capital to Risk Weighted Assets | 6.0 | 8.5
Capital to Risk Weighted Assets | 8.0 | 10.5
Common Equity Tier One Capital Ratio | 4.5 | 7.0
Basel III |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual, Ratio (as a percent) | 9.5 | 10.2
Tier One Risk Based Capital to Risk Weighted Assets | 10.7 | 12.4
Capital to Risk Weighted Assets | 13.4 | 15.4
For Capital Adequacy Purposes, Ratio (as a percent) | 4.0 | 4.0
Additional capital conservation buffer (as a percentage) | 2.50% |
Common Equity Tier One Capital Ratio | 9.5 | 10.2
BNB Bank | Basel III |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual, Ratio (as a percent) | 12.5 | 12.5
Tier One Risk Based Capital to Risk Weighted Assets | 12.5 | 12.5
Capital to Risk Weighted Assets | 13.4 | 13.3
For Capital Adequacy Purposes, Ratio (as a percent) | 4.0 | 4.0
Common Equity Tier One Capital Ratio | 12.5 | 12.5

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- Definition Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 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)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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