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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2017
Banking and Thrift [Abstract] |
Guidelines specify capital tiers | The Federal Reserve, the FDIC and the Office of the Comptroller of the Currency have issued guidelines governing the levels of capital that bank holding companies and banks must maintain. Those guidelines specify capital tiers, which include the following classifications:
Capital Tiers | Tier 1 Capital to Average Assets (Leverage) |  | Common Equity Tier 1 to Risk - Weighted Assets |  | Tier 1 Capital to Risk – Weighted Assets |  | Total Capital to Risk – Weighted Assets
Well capitalized | 5% or above |  | 6.5% or above |  | 8% or above |  | 10% or above
Adequately capitalized | 4% or above |  | 4.5% or above |  | 6% or above |  | 8% or above
Undercapitalized | Less than 4% |  | Less than 4.5% |  | Less than 6% |  | Less than 8%
Significantly undercapitalized | Less than 3% |  | Less than 3% |  | Less than 4% |  | Less than 6%
Critically undercapitalized | Tangible Equity / Total Assets less than 2%
Capital and risk-based capital and leverage ratios for the Company and for Renasant Bank | The following table provides the capital and risk-based capital and leverage ratios for the Company and for Renasant Bank as of December 31:
| 2017 |  | 2016
| Amount |  | Ratio |  | Amount |  | Ratio
Renasant Corporation |  |  |  |  |  |  |
Tier 1 Capital to Average Assets (Leverage) | $ | 979,604 |  |  | 10.18 | % |  | $ | 858,850 |  |  | 10.59 | %
Common Equity Tier 1 Capital to Risk-Weighted Assets | 896,733 |  |  | 11.34 | % |  | 766,560 |  |  | 11.47 | %
Tier 1 Capital to Risk-Weighted Assets | 979,604 |  |  | 12.39 | % |  | 858,850 |  |  | 12.86 | %
Total Capital to Risk-Weighted Assets | 1,142,926 |  |  | 14.46 | % |  | 1,004,038 |  |  | 15.03 | %
Renasant Bank |  |  |  |  |  |  |
Tier 1 Capital to Average Assets (Leverage) | $ | 1,000,715 |  |  | 10.42 | % |  | $ | 824,850 |  |  | 10.20 | %
Common Equity Tier 1 Capital to Risk-Weighted Assets | 1,000,715 |  |  | 12.69 | % |  | 824,850 |  |  | 12.38 | %
Tier 1 Capital to Risk-Weighted Assets | 1,000,715 |  |  | 12.69 | % |  | 824,850 |  |  | 12.38 | %
Total Capital to Risk-Weighted Assets | 1,050,751 |  |  | 13.32 | % |  | 871,911 |  |  | 13.09 | %

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- Definition Tabular disclosure of capital requirements for branches of foreign financial institutions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65210-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65207-112826 + Details
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