Defined Benefit and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 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 June 30,						Six Months Ended June 30,
	2022			2021			2022			2021
Service cost	$	29		$	63		$	58		$	126
Interest cost		48			43			96			86
Expected return on plan assets		(30	)		(32	)		(60	)		(65	)
Recognized net actuarial loss		60			148			120			297
Net periodic benefit cost	$	107		$	222		$	214		$	444

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,
	2022		2021		2022		2021
Service cost	$	18	$	19	$	36	$	38
Interest cost		316		277		646		570
Amortization of prior service cost		27		28		55		56
Recognized net actuarial loss		244		295		499		601
Net periodic benefit cost	$	605	$	619	$	1,236	$	1,265