Regulatory Matters - (Details 2) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Renasant Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital to Average Assets (Leverage) - Amount		$ 495,168
Tier 1 Capital to Average Assets (Leverage) - Ratio	9.89%	8.91%
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount	$ 459,108	$ 0
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio	10.45%	0.00%
Tier 1 Capital to Risk-Weighted Assets - Amount	$ 550,106	$ 495,168
Tier One Risk Based Capital to Risk Weighted Assets - Ratio	12.52%	11.82%
Total Capital to Risk-Weighted Assets - Amount	$ 595,089	$ 543,103
Capital to Risk Weighted Assets - Ratio	13.55%	12.96%
Renasant Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital to Average Assets (Leverage) - Amount		$ 467,944
Tier 1 Capital to Average Assets (Leverage) - Ratio	9.63%	8.64%
Common Equity Tier 1 Capital to Risk-Weighted Assets - Amount	$ 534,552	$ 0
Common Equity Tier 1 Capital to Risk-Weighted Assets - Ratio	12.20%	0.00%
Tier 1 Capital to Risk-Weighted Assets - Amount	$ 534,552	$ 467,944
Tier One Risk Based Capital to Risk Weighted Assets - Ratio	12.20%	11.46%
Total Capital to Risk-Weighted Assets - Amount	$ 578,960	$ 515,993
Capital to Risk Weighted Assets - Ratio	13.21%	12.59%