Defined Benefit and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2019

The Continuing 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,
	2019			2018
Service cost	$	53		$	69
Interest cost		90			83
Expected return on plan assets		(51	)		(57	)
Recognized net loss due to lump sum settlements		31			40
Recognized net actuarial loss		93			142
Net periodic benefit cost	$	216		$	277

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,
	2019		2018
Service cost	$	27	$	29
Interest cost		541		495
Amortization of prior service cost		63		63
Recognized net actuarial loss		162		226
Net periodic benefit cost	$	793	$	813