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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
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Renasant Corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,594,020 | $ 1,578,918
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.0975 | 0.0962
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,484,398 | $ 1,469,531
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 10.59% | 10.52%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,594,020 | $ 1,578,918
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1137 | 0.1130
Total Capital to Risk-Weighted Assets - Amount | $ 2,102,933 | $ 2,085,531
Total Capital to Risk-Weighted Assets - Ratio | 0.1500 | 0.1493
Renasant Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,728,934 | $ 1,714,965
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.1057 | 0.1045
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,728,934 | $ 1,714,965
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 12.31% | 12.25%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,728,934 | $ 1,714,965
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1231 | 0.1225
Total Capital to Risk-Weighted Assets - Amount | $ 1,904,816 | $ 1,888,104
Total Capital to Risk-Weighted Assets - Ratio | 0.1356 | 0.1349

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