Employee Benefit and Deferred Compensation Plans - Plan Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in benefit obligation
Benefit obligation at beginning of year	$ 20,195,000
Benefit obligation at end of year	18,685,000	$ 20,195,000
Pension Benefits Renasant
Change in benefit obligation
Benefit obligation at beginning of year	20,195,000	21,230,000
Service cost	0	0	$ 0
Interest cost	908,000	995,000	738,000
Plan participants’ contributions	0	0
Actuarial (gain) loss	(620,000)	74,000
Benefits paid	(1,798,000)	(2,104,000)
Benefit obligation at end of year	18,685,000	20,195,000	21,230,000
Change in fair value of plan assets
Fair value of plan assets at beginning of year	20,119,000	20,854,000
Actual return on plan assets	827,000	1,369,000
Contribution by employer	0	0
Benefits paid	(1,798,000)	(2,104,000)
Fair value of plan assets at end of year	19,148,000	20,119,000	20,854,000
Funded status at end of year	$ 463,000	$ (76,000)
Weighted-average assumptions as of December 31
Discount rate used to determine the benefit obligation	5.37%	4.74%
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of year	$ 512,000	$ 551,000
Service cost	0	1,000	4,000
Interest cost	21,000	22,000	12,000
Plan participants’ contributions	21,000	49,000
Actuarial (gain) loss	(89,000)	(21,000)
Benefits paid	(17,000)	(90,000)
Benefit obligation at end of year	448,000	512,000	$ 551,000
Change in fair value of plan assets
Contribution by employer	0	41,000
Funded status at end of year	$ (448,000)	$ (512,000)
Weighted-average assumptions as of December 31
Discount rate used to determine the benefit obligation	4.99%	4.53%