v3.25.2
Defined Benefit and Other Postretirement Benefits (Tables)
6 Months Ended
Jun. 30, 2025
Trustmark Capital Accumulation Plan [Member]  
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]  
Net Periodic Benefit Cost

The following table presents information regarding the net periodic benefit cost for the Continuing Plan for the periods presented ($ in thousands):

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2025

 

 

2024

 

 

2025

 

 

2024

 

Service cost

 

$

9

 

 

$

10

 

 

$

18

 

 

$

20

 

Interest cost

 

 

69

 

 

 

61

 

 

 

138

 

 

 

123

 

Expected return on plan assets

 

 

(31

)

 

 

(24

)

 

 

(63

)

 

 

(48

)

Recognized net (gain) loss due to lump sum settlements

 

 

 

 

 

(13

)

 

 

(50

)

 

 

(13

)

Recognized net actuarial (gain) loss

 

 

(2

)

 

 

 

 

 

(4

)

 

 

 

Net periodic benefit cost

 

$

45

 

 

$

34

 

 

$

39

 

 

$

82

 

Supplemental Retirement Plan [Member]  
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]  
Net Periodic Benefit Cost

The following table presents information regarding the net periodic benefit cost for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2025

 

 

2024

 

 

2025

 

 

2024

 

Service cost

 

$

4

 

 

$

11

 

 

$

8

 

 

$

22

 

Interest cost

 

 

475

 

 

 

459

 

 

 

970

 

 

 

936

 

Amortization of prior service cost

 

 

3

 

 

 

27

 

 

 

7

 

 

 

55

 

Recognized net actuarial loss

 

 

63

 

 

 

84

 

 

 

136

 

 

 

179

 

Net periodic benefit cost

 

$

545

 

 

$

581

 

 

$

1,121

 

 

$

1,192