Renasant Corporation (Parent Company Only) Condensed Financial Information - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income
Other dividends	$ 1,689	$ 1,189	$ 5,892
Total noninterest income	226,984	235,532	153,254
Expenses	44,684	71,335	98,923
Income tax benefit	46,935	19,840	48,091
Net income	175,892	83,651	167,596
Renasant Corporation
Income
Dividends from bank subsidiary	80,965	81,443	132,563
Interest income from bank subsidiary	7	9	9
Other dividends	80	93	175
Other income	32	74	138
Total noninterest income	81,084	81,619	132,885
Expenses	18,661	15,179	16,050
Income before income tax benefit and equity in undistributed net income of bank subsidiary	62,423	66,440	116,835
Income tax benefit	(4,795)	(3,889)	(4,077)
Equity in undistributed net income of bank subsidiary	108,674	13,322	46,684
Net income	$ 175,892	$ 83,651	$ 167,596