Employee Benefit and Deferred Compensation Plans - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) plan point shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2007 officer	Dec. 31, 2020 shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation	$ 20,195,000	$ 21,230,000
Retiring age limit, minimum	55 years
Retiring age limit, maximum	65 years
Eligible employee from service (in years)	15 years
Number of points for eligibility (points) | point	70
Minimum eligible age for Medicare coverage	65 years
Health care cost trend rate (percent)	7.70%
Pension plan assets managed by Park Place Capital (percent)	11.00%
Redemption notice	60 days
Employee deferrals (percent)	4.00%
Percentage of plan compensation as nondiscretionary contribution	5.00%
Percentage of plan compensation in excess of social security wage base	5.00%
Hours of service credited to the employees during the year	1000 hours
Profit-sharing contribution	$ 0
Employee deferrals amounts	$ 6,757,000	7,045,000	$ 11,919,000
Number of conventional deferred compensation plans | plan	2
Company's deferred compensation plan expense	$ 3,265,000	1,486,000	3,274,000
Number of officers provided for | officer				4
Expiration period subsequent to retirement				15 years
Supplemental executive retirement liabilities totaled	3,345,000	3,523,000
Incentive compensation plan expense	$ 10,030,000	$ 9,545,000	$ 8,609,000
Option expiration period	10 years
Granted (shares) | shares	0	0	0
Options outstanding (shares) | shares			0		10,500
Intrinsic value of options exercised			$ 262,000
Common shares reserved for issuance under employee benefit plans (shares) | shares	1,774,438
401(k) Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Common shares reserved for issuance under employee benefit plans (shares) | shares	950,594
Deferred Stock Unit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Common shares reserved for issuance under employee benefit plans (shares) | shares	132,246
2020 Long-Term Incentive Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Common shares reserved for issuance under employee benefit plans (shares) | shares	690,598
Stock Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Compensation expense	$ 0	$ 0	0
Performance- Based Restricted Stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Compensation expense	13,458,000	11,244,000	9,882,000
Restricted Stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unrecognized stock-based compensation expense	$ 13,487,000
Weighted average period over which unrecognized expense is expected to be recognized (in years)	1 year 9 months 10 days
Growth Investment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity income strategy (percent)	75.00%
Growth Investment | Defined Benefit Plan, Common Collective Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension plan assets, investment in collective trust, percentage	89.00%
Growth Investment | Real Estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity income strategy (percent)	6.00%
Growth Investment | Interest rate contracts
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity income strategy (percent)	25.00%
Pension Benefits Renasant
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contribution to pension benefit plan	$ 0	0
Accumulated benefit obligation	20,195,000	21,230,000	$ 27,567,000
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contribution to pension benefit plan	41,000	$ 3,000
Expected company contributions	$ 85,000