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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) $ in Thousands | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Renasant corporation |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,353,317 | $ 1,306,597
Tier 1 capital to average assets (leverage) - ratio | 0.0949 | 0.0937
Common equity tier 1 capital to risk-weighted assets - amount | $ 1,245,969 | $ 1,199,394
Common equity tier 1 capital to risk-weighted assets - ratio | 11.05% | 10.93%
Tier 1 capital to risk-weighted assets - amount | $ 1,353,317 | $ 1,306,597
Tier 1 capital to risk-weighted assets - ratio | 0.1200 | 0.1191
Total capital to risk-weighted assets - amount | $ 1,701,667 | $ 1,653,694
Total capital to risk-weighted assets - ratio | 0.1509 | 0.1507
Renasant bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 capital to average assets (leverage) - amount | $ 1,412,831 | $ 1,369,994
Tier 1 capital to average assets (leverage) - ratio | 0.0991 | 0.0983
Common equity tier 1 capital to risk-weighted assets - amount | $ 1,412,831 | $ 1,369,994
Common equity tier 1 capital to risk-weighted assets - ratio | 12.52% | 12.49%
Tier 1 capital to risk-weighted assets - amount | $ 1,412,831 | $ 1,369,994
Tier 1 capital to risk-weighted assets - ratio | 0.1252 | 0.1249
Total capital to risk-weighted assets - amount | $ 1,548,990 | $ 1,504,985
Total capital to risk-weighted assets - ratio | 0.1372 | 0.1373

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