Regulatory Matters (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Renasant Corporation
Capital and risk-based capital and leverage ratios for the Company and for Renasant Bank
Amount Included in Tier 1 Capital	$ 858,850	$ 681,731
Tier 1 Capital to Average Assets (Leverage) (percent)	10.59%	9.16%
Common Equity Tier One Capital to Risk - Weighted Assets, amount	$ 766,560	$ 591,356
Common Equity Tier One Capital to Risk - Weighted Assets (percent)	11.47%	9.99%
Tier 1 Capital to Risk -Weighted Assets, amount	$ 858,850	$ 681,731
Tier 1 Capital to Risk - Weighted Assets (percent)	12.86%	11.51%
Total Capital to Risk - Weighted Assets, amount	$ 1,004,038	$ 729,321
Total Capital to Risk - Weighted Assets (percent)	15.03%	12.32%
Renasant Bank
Capital and risk-based capital and leverage ratios for the Company and for Renasant Bank
Amount Included in Tier 1 Capital	$ 824,850	$ 654,830
Tier 1 Capital to Average Assets (Leverage) (percent)	10.20%	8.82%
Common Equity Tier One Capital to Risk - Weighted Assets, amount	$ 824,850	$ 654,830
Common Equity Tier One Capital to Risk - Weighted Assets (percent)	12.38%	11.09%
Tier 1 Capital to Risk -Weighted Assets, amount	$ 824,850	$ 654,830
Tier 1 Capital to Risk - Weighted Assets (percent)	12.38%	11.09%
Total Capital to Risk - Weighted Assets, amount	$ 871,911	$ 701,591
Total Capital to Risk - Weighted Assets (percent)	13.09%	11.89%