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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Jun. 30, 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 | $ 2,314,564 | $ 1,935,522
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.0936 | 0.1134
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 2,314,564 | $ 1,825,197
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 11.08% | 12.73%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 2,314,564 | $ 1,935,522
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1108 | 0.1350
Total Capital to Risk-Weighted Assets - Amount | $ 3,128,661 | $ 2,449,129
Total Capital to Risk-Weighted Assets - Ratio | 0.1497 | 0.1708
Renasant Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Capital to Average Assets (Leverage) - Amount | $ 2,480,714 | $ 1,843,123
Tier 1 Capital to Average Assets (Leverage) - Ratio | 0.1005 | 0.1080
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount | $ 2,480,714 | $ 1,843,123
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio | 11.88% | 12.85%
Tier 1 Capital to Risk-Weighted Assets - Amount | $ 2,480,714 | $ 1,843,123
Tier 1 Capital to Risk-Weighted Assets - Ratio | 0.1188 | 0.1285
Total Capital to Risk-Weighted Assets - Amount | $ 2,742,024 | $ 2,022,737
Total Capital to Risk-Weighted Assets - Ratio | 0.1313 | 0.1410

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