Defined Benefit and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2015

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 plans for the periods presented ($ in thousands):

	Three Months Ended March 31,
	2015			2014
Service cost	$	131		$	124
Interest cost		862			1,321
Expected return on plan assets		(1,296	)		(1,558	)
Recognized net loss due to lump sum settlements		417			375
Recognized net actuarial loss		967			736
Net periodic benefit cost	$	1,081		$	998

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,
	2015		2014
Service cost	$	108	$	73
Interest cost		524		554
Amortization of prior service cost		63		63
Recognized net actuarial loss		253		170
Net periodic benefit cost	$	948	$	860