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Employee Benefit and Deferred Compensation Plans - Additional Information (Details) | 12 Months Ended |
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Dec. 31, 2024 USD ($) point plan shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2007 officer | Dec. 31, 2021 shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Accumulated benefit obligation | $ 18,685,000 | $ 20,195,000 |  |  |
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) | 7.50% |  |  |  |
Pension plan assets managed by Park Place Capital (percent) | 13.00% |  |  |  |
Redemption notice | 60 days |  |  |  |
Employee deferrals (percent) | 4.00% |  |  |  |
Hours of service credited to the employees during the year | 1000 hours |  |  |  |
Profit-sharing contribution | $ 0 |  |  |  |
Employee deferrals amounts | $ 7,290,000 | 6,757,000 | $ 7,045,000 |  |
Number of conventional deferred compensation plans | plan | 2 |  |  |  |
Company's deferred compensation plan expense | $ 3,269,000 | 3,265,000 | 1,486,000 |  |
Number of officers provided for | officer |  |  |  | 4 |
Expiration period subsequent to retirement |  |  |  | 15 years |
Supplemental executive retirement liabilities totaled | 3,143,000 | 3,345,000 |  |  |
Incentive compensation plan expense | $ 8,659,000 | $ 10,303,000 | $ 9,545,000 |  |
Option expiration period | 10 years |  |  |  |
Granted (shares) | shares | 0 | 0 | 0 |  |
Options outstanding (shares) | shares |  |  |  |  | 0
Common shares reserved for issuance under employee benefit plans (shares) | shares | 2,418,071 |  |  |  |
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 | 955,493 |  |  |  |
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 | 124,250 |  |  |  |
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 | 1,338,328 |  |  |  |
Performance- Based Restricted Stock |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Compensation expense | $ 13,562,000 | $ 13,458,000 | $ 11,244,000 |  |
Restricted Stock |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Unrecognized stock-based compensation expense | $ 13,322,000 |  |  |  |
Weighted average period over which unrecognized expense is expected to be recognized (in years) | 1 year 8 months 4 days |  |  |  |
Growth Investment |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Equity income strategy (percent) | 63.00% |  |  |  |
Growth Investment | Common Collective Trust |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Pension plan assets, investment in collective trust, percentage | 87.00% |  |  |  |
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) | 37.00% |  |  |  |
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 | 18,685,000 | 20,195,000 | 21,230,000 |  |
Other Benefits |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Company contribution to pension benefit plan | 0 | 41,000 |  |  |
Accumulated benefit obligation | 448,000 | $ 512,000 | $ 551,000 |  |
Expected company contributions | $ 86,000 |  |  |  |

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