Defined Benefit and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2022

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 March 31,
	2022			2021
Service cost	$	29		$	63
Interest cost		48			43
Expected return on plan assets		(30	)		(33	)
Recognized net actuarial loss		60			149
Net periodic benefit cost	$	107		$	222

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 March 31,
	2022		2021
Service cost	$	18	$	19
Interest cost		330		293
Amortization of prior service cost		28		28
Recognized net actuarial loss		255		306
Net periodic benefit cost	$	631	$	646