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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
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Renasant Corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,948,348 | $ 1,935,522
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.1139 | 0.1134
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,837,789 | $ 1,825,197
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 12.59% | 12.73%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,948,348 | $ 1,935,522
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1335 | 0.1350
Total Capital to Risk-Weighted Assets - Amount | $ 2,465,568 | $ 2,449,129
Total Capital to Risk-Weighted Assets - Ratio | 0.1689 | 0.1708
Renasant Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 1,855,377 | $ 1,843,123
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.1085 | 0.1080
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,855,377 | $ 1,843,123
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 12.71% | 12.85%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 1,855,377 | $ 1,843,123
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1271 | 0.1285
Total Capital to Risk-Weighted Assets - Amount | $ 2,038,363 | $ 2,022,737
Total Capital to Risk-Weighted Assets - Ratio | 0.1396 | 0.1410

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