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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
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Renasant corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,281,318 | $ 1,262,588
Tier 1 capital to average assets (leverage) - ratio | 0.0917 | 0.1037
Common equity tier 1 capital to risk-weighted assets - amount | $ 1,174,260 | $ 1,156,828
Common equity tier 1 capital to risk-weighted assets - ratio | 10.80% | 11.12%
Tier 1 capital to risk-weighted assets - amount | $ 1,281,318 | $ 1,262,588
Tier 1 capital to risk-weighted assets - ratio | 0.1179 | 0.1214
Total capital to risk-weighted assets - amount | $ 1,618,837 | $ 1,432,949
Total capital to risk-weighted assets - ratio | 0.1489 | 0.1378
Renasant bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,344,938 | $ 1,331,809
Tier 1 capital to average assets (leverage) - ratio | 0.0964 | 0.1095
Common equity tier 1 capital to risk-weighted assets - amount | $ 1,344,938 | $ 1,331,809
Common equity tier 1 capital to risk-weighted assets - ratio | 12.38% | 12.81%
Tier 1 capital to risk-weighted assets - amount | $ 1,344,938 | $ 1,331,809
Tier 1 capital to risk-weighted assets - ratio | 0.1238 | 0.1281
Total capital to risk-weighted assets - amount | $ 1,470,402 | $ 1,388,553
Total capital to risk-weighted assets - ratio | 0.1353 | 0.1336

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