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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Renasant Corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,000,640 | $ 979,604
Tier 1 capital to average assets (leverage) - ratio | 10.61% | 10.18%
Common equity tier 1 capital to risk-weighted assets - amount | $ 917,501 | $ 896,733
Common equity tier 1 capital to risk-weighted assets - ratio | 11.38% | 11.34%
Tier 1 capital to risk-weighted assets - amount | $ 1,000,640 | $ 979,604
Tier 1 capital to risk-weighted assets - ratio | 12.41% | 12.39%
Total capital to risk-weighted assets - amount | $ 1,164,193 | $ 1,142,926
Total capital to risk-weighted assets - ratio | 14.44% | 14.46%
Renasant Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,023,486 | $ 1,000,715
Tier 1 capital to average assets (leverage) - ratio | 10.88% | 10.42%
Common equity tier 1 capital to risk-weighted assets - amount | $ 1,023,486 | $ 1,000,715
Common equity tier 1 capital to risk-weighted assets - ratio | 12.71% | 12.69%
Tier 1 capital to risk-weighted assets - amount | $ 1,023,486 | $ 1,000,715
Tier 1 capital to risk-weighted assets - ratio | 12.71% | 12.69%
Total capital to risk-weighted assets - amount | $ 1,073,712 | $ 1,050,751
Total capital to risk-weighted assets - ratio | 13.33% | 13.32%

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- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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