Defined Benefit and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 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 June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Service cost	$	129		$	125		$	260		$	249
Interest cost		864			1,322			1,726			2,643
Expected return on plan assets		(1,297	)		(1,560	)		(2,593	)		(3,118	)
Recognized net loss due to lump sum settlements		479			375			896			750
Recognized net actuarial loss		971			736			1,938			1,472
Net periodic benefit cost	$	1,146		$	998		$	2,227		$	1,996

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,
	2015		2014		2015		2014
Service cost	$	108	$	75	$	216	$	148
Interest cost		519		548		1,043		1,102
Amortization of prior service cost		62		62		125		125
Recognized net actuarial loss		246		163		499		333
Net periodic benefit cost	$	935	$	848	$	1,883	$	1,708