Employee Benefit and Deferred Compensation Plans - Plan Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in benefit obligation
Benefit obligation at beginning of year	$ 21,230,000
Benefit obligation at end of year	20,195,000	$ 21,230,000
Change in fair value of plan assets
Fair value of plan assets at beginning of year	20,854,000
Fair value of plan assets at end of year	20,119,000	20,854,000
Pension Benefits Renasant
Change in benefit obligation
Benefit obligation at beginning of year	21,230,000	27,567,000
Service cost	0	0	$ 0
Interest cost	995,000	738,000	682,000
Plan participants’ contributions	0	0
Actuarial loss (gain)	74,000	(5,256,000)
Benefits paid	(2,104,000)	(1,819,000)
Benefit obligation at end of year	20,195,000	21,230,000	27,567,000
Change in fair value of plan assets
Fair value of plan assets at beginning of year	20,854,000	30,399,000
Actual return on plan assets	1,369,000	(7,726,000)
Contribution by employer	0	0
Benefits paid	(2,104,000)	(1,819,000)
Fair value of plan assets at end of year	20,119,000	20,854,000	30,399,000
Funded status at end of year	$ (76,000)	$ (376,000)
Weighted-average assumptions as of December 31
Discount rate used to determine the benefit obligation	4.74%	4.94%
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of year	$ 551,000	$ 586,000
Service cost	1,000	4,000	5,000
Interest cost	22,000	12,000	14,000
Plan participants’ contributions	49,000	85,000
Actuarial loss (gain)	(21,000)	(48,000)
Benefits paid	(90,000)	(88,000)
Benefit obligation at end of year	512,000	551,000	$ 586,000
Change in fair value of plan assets
Funded status at end of year	$ (512,000)	$ (551,000)
Weighted-average assumptions as of December 31
Discount rate used to determine the benefit obligation	4.53%	4.74%