Defined Benefit and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

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 Trustmark’s qualified defined benefit pension plan for the periods presented ($ in thousands):

	Three Months Ended March 31,
	2016			2015
Service cost	$	108		$	131
Interest cost		830			862
Expected return on plan assets		(1,022	)		(1,296	)
Recognized net loss due to lump sum settlements		423			417
Recognized net actuarial loss		661			967
Net periodic benefit cost	$	1,000		$	1,081

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,
	2016		2015
Service cost	$	74	$	108
Interest cost		546		524
Amortization of prior service cost		63		63
Recognized net actuarial loss		221		253
Net periodic benefit cost	$	904	$	948