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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Renasant Corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,558,521 | $ 1,481,197
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.0948 | 0.0936
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,449,367 | $ 1,372,747
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 10.46% | 10.21%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,558,521 | $ 1,481,197
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1125 | 0.1101
Total Capital to Risk-Weighted Assets - Amount | $ 2,065,992 | $ 1,968,001
Total Capital to Risk-Weighted Assets - Ratio | 0.1491 | 0.1463
Renasant Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,698,680 | $ 1,630,389
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.1033 | 0.1030
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,698,680 | $ 1,630,389
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 12.23% | 12.10%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,698,680 | $ 1,630,389
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1223 | 0.1210
Total Capital to Risk-Weighted Assets - Amount | $ 1,869,600 | $ 1,781,312
Total Capital to Risk-Weighted Assets - Ratio | 0.1346 | 0.1322

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