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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Actual and Required Capital Ratios (Details) | Sep. 30, 2018 | Dec. 31, 2017
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Tier 1 capital to risk-weighted assets |  |
Total capital to risk weighted assets | 14.20% | 13.70%
Common equity tier 1 capital to risk weighted assets | 11.70% | 11.30%
Tier 1 capital to risk weighted assets | 12.60% | 12.20%
Tier 1 capital to average assets | 8.40% | 8.10%
Bank |  |
Tier 1 capital to risk-weighted assets |  |
Total capital to risk weighted assets | 13.80% | 13.70%
Common equity tier 1 capital to risk weighted assets | 13.00% | 12.90%
Tier 1 capital to risk weighted assets | 13.00% | 12.90%
Tier 1 capital to average assets | 8.70% | 8.60%
Regulatory minimum to be well capitalized, Total capital to risk weighted assets | 10.00% | 10.00%
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 Common equity Tier 1 capital ratio (Common equity Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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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