Renasant Corporation (Parent Company Only) Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 414,930	$ 569,111
Loans, net	9,637,476	9,034,103
Other assets	165,527	202,621
Total assets	13,400,618	12,934,878	$ 9,829,981
Liabilities and shareholders’ equity
Other liabilities	196,163	111,084
Shareholders’ equity	2,125,689	2,043,913	$ 1,514,983	$ 1,232,883
Total liabilities and shareholders’ equity	13,400,618	12,934,878
Cash collateral	3,840	3,737
Renasant Corporation
Assets
Cash and cash equivalents	29,467	44,581
Investments	1,653	1,662
Loans, net	0	640
Investment in bank subsidiary	2,302,499	2,236,932
Accrued interest receivable on bank balances	6	6
Intercompany receivable	0	1,618
Other assets	22,861	18,574
Total assets	2,356,486	2,304,013
Liabilities and shareholders’ equity
Junior subordinated debentures	110,215	109,636
Subordinated notes	113,955	147,239
Other liabilities	6,627	3,225
Shareholders’ equity	2,125,689	2,043,913
Total liabilities and shareholders’ equity	$ 2,356,486	$ 2,304,013