Renasant Corporation (Parent Company Only) Condensed Financial Information - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income
Other dividends	$ 30,375	$ 8,853	$ 1,689
Total noninterest income	113,075	149,253	226,984
Expenses	277,992	60,512	44,684
Income tax benefit	32,509	45,240	46,935
Net income (loss)	144,678	166,068	175,892
Renasant Corporation
Income
Dividends from bank subsidiary	72,042	68,114	80,965
Interest income from bank subsidiary	28	5	7
Other dividends	260	134	80
Other income	919	85	32
Total noninterest income	73,249	68,338	81,084
Expenses	30,544	24,264	18,661
Income before income taxes	42,705	44,074	62,423
Income tax benefit	(7,577)	(6,231)	(4,795)
Equity in undistributed net income of bank subsidiary	94,396	115,763	108,674
Net income (loss)	$ 144,678	$ 166,068	$ 175,892