| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Document Information [Line Items] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | Trustmark Corporation |
| Entity Central Index Key | 0000036146 |
| Pay vs Performance Disclosure | 12 Months Ended | ||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | |
| Pay vs Performance Disclosure [Table] | |||
| Pay vs Performance [Table Text Block] | Pay-Versus-Performance The following table presents certain information regarding compensation paid to Trustmark’s CEO and other NEOs, and certain measures of cal S-K. Year Summary Compensation Table Total for CEO ($) Compensation Actually Paid to CEO (1) ($) Average Summary Compensation Table Total for non-CEO Named Executive Officers ($) Average Compensation Actually Paid to non-CEO Named Executive Officers (2) ($) Value of Initial Fixed $100 Investment Based on: Net Income (4) ($in thousands) ($) ROATE (5) (%) Trustmark Total Shareholder Return ($) S&P 500 Regional Banks Total Shareholder Return (3) ($) 2022 $2,739,279 $2,810,846 (6) $1,047,684 $1,056,136 (9) $111.19 $99.93 $71,887 12.12% 2021 $2,472,426 $2,666,493(7 ) $1,151,155 $1,222,268 (10) $100.46 $134.16 $147,365 11.45% 2020 $3,616,342 $2,317,370 (8) $1,277,423 $948,065( 11) $82.09 $95.47 $160,025 12.81% (1) Mr. Dewey served as CEO during 2021 and 2022. Mr. Host was CEO for 2020. (2) In 2022, the other NEOs were Messrs. Owen, Harvey, Stevens and Tate. In 2021, the other NEOs were Messrs. Owens, Host, Harvey, Tate and Louis E. Greer (former CFO). In 2020, the other NEOs were Messrs. Dewey, Greer, Harvey, and Breck Tyler. (3) Market index used for this column is S&P 500 – Regional Banks. (4) Net income for 2022 includes a reduction of $75.6 million (after tax) related to the Stanford settlement. (5) Return on average tangible equity (ROATE) is calculated using net income adjusted for intangible amortization divided by total average tangible common equity (total shareholders’ equity less goodwill and other identifiable intangible assets); it excludes the impact of (i) restructurings, discontinued operations, extraordinary items and other significant non-routine 2016-02 2016-13, (6) To calculate the compensation “actually paid” to CEO for 2022, the Stock Awards value in the Summary Compensation Table (SCT) was deducted ($799,741) and an amount equal to $871,308 was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. (7) To calculate the compensation “actually paid” to CEO for 2021, the Stock Awards value in the SCT was deducted ($909,128) and an amount equal to $1,103,195 was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. (8) To calculate the compensation “actually paid” to CEO for 2020, the Stock Awards value ($791,431) and the Change in Pension Value ($638,447) in the SCT were deducted and an amount equal to $130,906 was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. (9) To calculate the compensation “actually paid” to other NEOs for 2022, the Stock Awards value in the SCT was deducted (average $249,936), the service cost related to the Supplemental Executive Retirement Plan was added (average $9,803) and an amount equal to $248,584 (average) was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. (10) To calculate the compensation “actually paid” to other NEOs for 2021, the Stock Awards value in the SCT was deducted (average $405,875), the service cost related to the Supplemental Executive Retirement Plan was added ($7,023 average) and an amount equal to $469,964 (average) was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. (11) To calculate the compensation “actually paid” to other NEOs for 2020, the Stock Awards value (average $215,185) and the Change in Pension Value (average $188,344) in the SCT were deducted, the service cost related to the Supplemental Executive Retirement Plan was added (average $14,868) and an amount equal to $59,302 (average) was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. | ||
| Company Selected Measure Name | Return on average tangible equity (ROATE) | ||
| Named Executive Officers, Footnote [Text Block] | Mr. Dewey served as CEO during 2021 and 2022. Mr. Host was CEO for 2020.In 2022, the other NEOs were Messrs. Owen, Harvey, Stevens and Tate. In 2021, the other NEOs were Messrs. Owens, Host, Harvey, Tate and Louis E. Greer (former CFO). In 2020, the other NEOs were Messrs. Dewey, Greer, Harvey, and Breck Tyler. | ||
| Peer Group Issuers, Footnote [Text Block] | Market index used for this column is S&P 500 – Regional Banks. | ||
| PEO Total Compensation Amount | $ 2,739,279 | $ 2,472,426 | $ 3,616,342 |
| PEO Actually Paid Compensation Amount | $ 2,810,846 | 2,666,493 | 2,317,370 |
| Adjustment To PEO Compensation, Footnote [Text Block] | To calculate the compensation “actually paid” to CEO for 2022, the Stock Awards value in the Summary Compensation Table (SCT) was deducted ($799,741) and an amount equal to $871,308 was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. S-K. S-K. | ||
| Non-PEO NEO Average Total Compensation Amount | $ 1,047,684 | 1,151,155 | 1,277,423 |
| Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,056,136 | 1,222,268 | 948,065 |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | To calculate the compensation “actually paid” to other NEOs for 2022, the Stock Awards value in the SCT was deducted (average $249,936), the service cost related to the Supplemental Executive Retirement Plan was added (average $9,803) and an amount equal to $248,584 (average) was added, representing the result of the stock calculations required by Item 402(v)(2)(iii)(C) of Regulation S-K. S-K. S-K. | ||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | Actually Paid versus Company Performance . CEO · From 2021 to 2022, compensation actually paid to the CEO increased by $144,353 or 5.4%. Over this same period, the company’s TSR increased by 10.7%, net income decreased by 51.2%, and ROATE increased by 5.9%. Net income for 2022 includes a reduction of $75.6 million (after tax) related to the Stanford settlement; excluding this charge, net income for 2022 would have been $147.5 million. Some key factors that drove the changes in compensation actually paid during this CEO’s second year were an increase in salary, an increase in annual MIP bonus, and a decrease in stock value due to the CEO receiving a one-time · From 2020 to 2021, compensation actually paid to the CEO increased by $349,123 or 15.1%. Over this same period, the company’s TSR increased by 22.4%, net income decreased by 7.9%, and ROATE decreased by 10.6%. Some key factors that drove the changes in compensation actually paid were the transition to the new first-year CEO during 2021, which represented a traditional compensation decrease in salary, MIP bonus, and equity awards. However, the addition of a one-time Other NEOs · From 2021 to 2022, compensation actually paid to the other NEOs decreased by $166,132 or 13.6%. Over this same period, the company’s TSR increased by 10.7%, net income decreased by 51.2%, and ROATE increased by 5.9%. Net income for 2022 includes a reduction of $75.6 million (after tax), related to the Stanford settlement; without this charge, net income for 2022 would have been $147.5 million. Some key factors that drove the decrease in pay over this period were leadership transitions within the NEO group, including a full year of service by the Executive Chairman in 2021 and only four months of service by the Executive Chairman in 2022, creating an expanded average when compared to the more traditional NEO levels in 2022. · From 2020 to 2021, compensation actually paid to the other NEOs increased by $274,203 or 28.9%. Over this same period, the company’s TSR increased by 22.4%, net income decreased by 7.9%, and ROATE decreased by 10.6%. Some key factors that drove the changes in pay included the impact of leadership transitions within the NEO group, as well as one-time | ||
| Total Shareholder Return Vs Peer Group [Text Block] | The relationship between the company’s TSR and the TSR of S&P 500 Regional Banks index is shown below: Comparison of Total Shareholder Return Assumes Initial Investment of $100 | ||
| Tabular List [Table Text Block] | Tabular List of Financial Performance Measures. the t important · ROATE · EPS · Efficiency Ratio · Non-Performing · Non-Interest | ||
| Total Shareholder Return Amount | $ 111.19 | 100.46 | 82.09 |
| Peer Group Total Shareholder Return Amount | 99.93 | 134.16 | 95.47 |
| Net Income (Loss) | $ 71,887,000 | $ 147,365,000 | $ 160,025,000 |
| Company Selected Measure Amount | 0.1212 | 0.1145 | 0.1281 |
| PEO Name | Mr. Dewey | Mr. Host | |
| Measure [Axis]: 1 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | ROATE | ||
| Non-GAAP Measure Description [Text Block] | Return on average tangible equity (ROATE) is calculated using net income adjusted for intangible amortization divided by total average tangible common equity (total shareholders’ equity less goodwill and other identifiable intangible assets); it excludes the impact of (i) restructurings, discontinued operations, extraordinary items and other significant non-routine 2016-02 2016-13, | ||
| Measure [Axis]: 2 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | EPS | ||
| Measure [Axis]: 3 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Efficiency Ratio | ||
| Measure [Axis]: 4 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Non-Performing Assets/total loans + ORE, excluding PPP loans | ||
| Measure [Axis]: 5 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Non-Interest Expense (Core) | ||
| PEO [Member] | Deducted Due To Stock Calculations [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ (799,741) | $ (909,128) | $ (791,431) |
| PEO [Member] | Added Due To Stock Calculations [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 871,308 | 1,103,195 | 130,906 |
| PEO [Member] | Deduction Due To Change In Pension Value [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (638,447) | ||
| Non-PEO NEO [Member] | Deducted Due To Stock Calculations [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (249,936) | (405,875) | (215,185) |
| Non-PEO NEO [Member] | Added Due To Stock Calculations [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 9,803 | 7,023 | 59,302 |
| Non-PEO NEO [Member] | Deduction Due To Change In Pension Value [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (188,344) | ||
| Non-PEO NEO [Member] | Service Cost Related To Supplemental Executive Retirement Plan [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ 248,584 | $ 469,964 | $ 14,868 |
