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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Actual and Required Capital Ratios (Details) | Mar. 31, 2018 | Dec. 31, 2017
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Tier 1 capital to risk-weighted assets |  |
Total capital to risk weighted assets | 13.90% | 13.70%
Common equity tier 1 capital to risk weighted assets | 11.40% | 11.30%
Tier 1 capital to risk weighted assets | 12.30% | 12.20%
Tier 1 capital to average assets | 8.20% | 8.10%
Regulatory minimum to be well capitalized, Total capital to risk weighted assets | 10.50% | 10.50%
Regulatory minimum to be well capitalized, Common Equity Tier 1 Capital to risk weighted assets | 6.50% | 6.50%
Regulatory minimum to be well capitalized, Tier 1 capital to risk weighted assets | 8.00% | 8.00%
Regulatory minimum to be well capitalized, Tier 1 capital to average assets | 5.00% | 5.00%
Bank |  |
Tier 1 capital to risk-weighted assets |  |
Total capital to risk weighted assets | 13.70% | 13.70%
Common equity tier 1 capital to risk weighted assets | 12.90% | 12.90%
Tier 1 capital to risk weighted assets | 12.90% | 12.90%
Tier 1 capital to average assets | 8.60% | 8.60%
Regulatory minimum to be well capitalized, Total capital to risk weighted assets | 10.50% | 10.50%
Regulatory minimum to be well capitalized, Common Equity Tier 1 Capital to risk weighted assets | 6.50% | 6.50%
Regulatory minimum to be well capitalized, Tier 1 capital to risk weighted assets | 8.00% | 8.00%
Regulatory minimum to be well capitalized, Tier 1 capital to average assets | 5.00% | 5.00%

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- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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