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Regulatory Matters - Capital and Risk-Based Capital and Leverage Ratios (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Renasant Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to average assets (leverage) - amount	$ 1,256,295	$ 1,188,412
Tier 1 capital to average assets (leverage) - ratio	10.65%	10.11%
Common equity tier 1 capital to risk-weighted assets - amount	$ 1,151,807	$ 1,085,751
Common equity tier 1 capital to risk-weighted assets - ratio	11.64%	11.05%
Tier 1 capital to risk-weighted assets - amount	$ 1,256,295	$ 1,188,412
Tier 1 capital to risk-weighted assets - ratio	12.69%	12.10%
Total capital to risk-weighted assets - amount	$ 1,447,352	$ 1,386,507
Total capital to risk-weighted assets - ratio	14.62%	14.12%
Renasant Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to average assets (leverage) - amount	$ 1,355,408	$ 1,276,976
Tier 1 capital to average assets (leverage) - ratio	11.50%	10.88%
Common equity tier 1 capital to risk-weighted assets - amount	$ 1,355,408	$ 1,276,976
Common equity tier 1 capital to risk-weighted assets - ratio	13.71%	13.02%
Tier 1 capital to risk-weighted assets - amount	$ 1,355,408	$ 1,276,976
Tier 1 capital to risk-weighted assets - ratio	13.71%	13.02%
Total capital to risk-weighted assets - amount	$ 1,408,931	$ 1,331,619
Total capital to risk-weighted assets - ratio	14.25%	13.58%

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The amount of total capital as defined in the regulations.

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